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Guang-hui Zhang - One of the best experts on this subject based on the ideXlab platform.
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Soil Resistance to flowing water erosion of seven typical plant communities on steep gully slopes on the loess plateau of china
Catena, 2019Co-Authors: Baojun Zhang, Guang-hui Zhang, Hanyue Yang, Hao WangAbstract:Abstract Steep gully slopes are widespread and have been recognized as the main sediment source on the Loess Plateau. Different vegetation growth may lead to the differences in Soil properties and plant roots, and thus likely affects Soil Resistance to flowing water erosion, reflected by rill erodibility and critical shear stress. However, few studies have been conducted to evaluate this effect on steep gully slopes on the Loess Plateau of China. This study was performed to investigate the effects of vegetation growth on Soil Resistance to flowing water erosion on steep gully slopes, and quantify the main potential influencing factors on the Loess Plateau. Three typical shrub communities and four typical grass communities that distributed on different gully slopes were selected. 240 undisturbed Soil samples were collected from these seven gully slope lands and one slope farmland (control), and were subjected to detachment by overland flow under six different shear stresses (6.64 to 17.85 Pa). The results showed that the mean detachment capacity of slope farmland was 6.9 to 47.8 times greater than those of steep gully slopes covered with different plant communities. The rill erodibilities of steep gully slopes covered with different plant communities reduced greatly by 77.0% to 95.1% compared to the control slope. The critical shear stress of slope farmland (2.72 Pa) was only 57.2% and 39.6% of that of shrubland (4.76 Pa) and grassland (6.88 Pa). Both shrub and grass communities were effective in reducing Soil detachment capacity and rill erodibility, and increasing critical shear stress on steep gully slopes. But the effects were more obvious for the grass communities. The differences in rill erodibility between slope farmland and gully slope lands were mainly explained by the changes in root mass density (82.4%). Plant roots had strong direct effects on increasing Soil cohesion (0.78), organic matter content (0.56), and water stable aggregation (0.92). Rill erodibility was negatively related to root mass density as an exponential function (p
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Effects of landscape positions on Soil Resistance to rill erosion in a small catchment on the Loess Plateau
Biosystems Engineering, 2017Co-Authors: Ren Geng, Guang-hui Zhang, Hao WangAbstract:Landscape position has significant effects on Soil properties and plant roots, and thus probably affects Soil Resistance to rill erosion, reflected by rill erodibility and critical shear stress. However, the potential effects of landscape positions on Soil Resistance to rill erosion are still unclear. Therefore, this study was conducted to investigate the spatial variations in Soil Resistance to rill erosion under different landscape positions, and to identify the main factors controlling these variations in a small catchment of the Loess Plateau. 540 undisturbed Soil samples were collected from 18 typical sampling sites of natural succession grassland under six landscape positions and subjected to scour under different flow shear stresses. The results showed that landscape position significantly affected the spatial variation of rill erodibility. The mean rill erodibility decreased gradually from the top of ridge to footslope and increased linearly with elevation. Significant differences were detected in rill erodibility between three grass species. No significant difference was found in critical shear stress between six landscape positions. Soil erosion and Soil water content dominated the regular spatial changes of Soil properties and root mass density along six landscape positions. All of these factors collectively resulted in the regular decrease of rill erodibility from the top of ridge to footslope. A negative relationship was identified between critical shear stress and clay content. Rill erodibility could be satisfactorily estimated by the median Soil grain size, Soil cohesion, water stable aggregate and root mass density.
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Soil Resistance to runoff on steep croplands in Eastern China
CATENA, 2017Co-Authors: Ren Geng, Guang-hui Zhang, Lunjiang WangAbstract:Abstract The knowledge of Soil Resistance to runoff (reflected by rill erodibility, K r , and critical shear stress, τ c ) of steep croplands from laboratory flume experiments and their influencing factors are unclear at a larger scale. Therefore, the disturbed Soil samples (representing the freshly tilled steep croplands) of 36 Soil types were collected from eastern China and scoured under different flow shear stresses to investigate the spatial variations in K r and τ c and their influencing factors. The results showed that the Soil “Argi-Udic Ferrosols” had the lowest K r , while the Soil “Aqui-Sandic Primosols” had the highest K r . The K r values of the 36 Soil types showed a high spatial variability. The mean K r of the northwest Loess Plateau was significantly greater than that of the other five secondary water erosion regions. Soil texture with moderate clay and sand content had the highest K r . τ c showed moderate spatial variability, and no obvious correlation was detected with Soil types, the six secondary water erosion regions, or Soil textures. K r was significantly correlated with the measured Soil physical and chemical properties. No significant correlation was found between τ c and measured Soil properties. K r could be satisfactorily estimated by the silt content, sand content, the geometric mean particle diameter of the Soil ( D g ), cation exchange capacity ( CEC ) and Soil organic matter ( SOM ) ( R 2 = 0.70).
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Temporal variation in Soil Resistance to flowing water erosion for Soil incorporated with plant litters in the Loess Plateau of China
CATENA, 2016Co-Authors: Long Sun, Guang-hui Zhang, Li-li Luan, Fa LiuAbstract:Abstract Plant litter can be incorporated into topSoil under natural circumstances by Soil splash, sediment deposition, and Soil-dwelling animal activities. The incorporated litter can change the mechanical properties of Soil and the decomposition of the incorporated litter can improve Soil structural stability. Those changes likely influence Soil detachment process by overland flow. This study was undertaken to quantify the effects of incorporated plant litters into topSoil on the temporal variation in Soil Resistance to detachment by overland flow using natural Soil samples collected from four different plots (one control and three litter incorporation treatments) and then scoured under six different flow shear stresses in a hydraulic flume. The experiment started from April 19 to October 5, 2015 for 10 times at approximately 20 days sampling intervals. Soil properties and environmental parameters were also measured at each sampling time to explain the temporal variations in rill erodibility and critical shear stress. The results showed that the incorporated plant litter was effective to enhance Soil Resistance to flowing water erosion. Compared to bare Soil, rill erodibilities of litter incorporated Soils of black locust, sea buckthorn, and green bristle grass decreased by 24.3%, 33.5%, and 34.8%. The temporal variations in rill erodibility of bare and litter incorporated Soils were similar. Rill erodibility decreased significantly over time as an exponential function for both bare and litter incorporated Soils. The relative rill erodibility of three litter incorporated Soils increased over time as a power function. The fitted critical shear stress increased exponentially over time. The temporal variations in rill erodibility could be explained by the temporal variations in Soil consolidation, water stable aggregate, and litter decomposition. Rill erodibility could be well estimated by Soil bulk density, water stable aggregate, and litter mass density ( r 2 = 0.92).
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Effects of incorporated plant litter on Soil Resistance to flowing water erosion in the Loess Plateau of China
Biosystems Engineering, 2016Co-Authors: Long Sun, Guang-hui Zhang, Fa Liu, Li-li LuanAbstract:Plant litter can be incorporated into top Soil via different approaches, which probably influence Soil erosion processes controlled by overland flow. However, few studies have been conducted to quantify the effects of incorporated plant litter on the Soil detachment process by overland flow. This study was performed to investigate the effects of incorporated litter rate on Soil detachment capacity and Soil Resistance to flowing water erosion using undisturbed Soil samples taken from 16 plots (three plant litter species by five incorporation rates, and one bare control) and were subjected to six different flow shear stresses in the Loess Plateau. The results showed that Soil detachment capacity decreased exponentially with incorporated plant litter rate. A threshold of 0.35 kg m−2 of litter needed to be incorporated to provide protection of Soil from overland flow erosion. The effects of litter incorporation rate on Soil detachment capacity was not significant when the incorporation rate was greater than 0.35 kg m−2. Rill erodibility also decreased exponentially with the incorporated plant litter rate. The shape of plant litter fragments was hypothesised to account for the variations in the effects of different incorporated litter species on Soil detachment capacity and rill erodibility. A distinguishable increasing linear trend was observed between critical shear stress and litter incorporated rate, but with a weak correlation. Critical shear stress also increased with incorporated rate and was related to Soil cohesion.
Hao Wang - One of the best experts on this subject based on the ideXlab platform.
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Soil Resistance to flowing water erosion of seven typical plant communities on steep gully slopes on the loess plateau of china
Catena, 2019Co-Authors: Baojun Zhang, Guang-hui Zhang, Hanyue Yang, Hao WangAbstract:Abstract Steep gully slopes are widespread and have been recognized as the main sediment source on the Loess Plateau. Different vegetation growth may lead to the differences in Soil properties and plant roots, and thus likely affects Soil Resistance to flowing water erosion, reflected by rill erodibility and critical shear stress. However, few studies have been conducted to evaluate this effect on steep gully slopes on the Loess Plateau of China. This study was performed to investigate the effects of vegetation growth on Soil Resistance to flowing water erosion on steep gully slopes, and quantify the main potential influencing factors on the Loess Plateau. Three typical shrub communities and four typical grass communities that distributed on different gully slopes were selected. 240 undisturbed Soil samples were collected from these seven gully slope lands and one slope farmland (control), and were subjected to detachment by overland flow under six different shear stresses (6.64 to 17.85 Pa). The results showed that the mean detachment capacity of slope farmland was 6.9 to 47.8 times greater than those of steep gully slopes covered with different plant communities. The rill erodibilities of steep gully slopes covered with different plant communities reduced greatly by 77.0% to 95.1% compared to the control slope. The critical shear stress of slope farmland (2.72 Pa) was only 57.2% and 39.6% of that of shrubland (4.76 Pa) and grassland (6.88 Pa). Both shrub and grass communities were effective in reducing Soil detachment capacity and rill erodibility, and increasing critical shear stress on steep gully slopes. But the effects were more obvious for the grass communities. The differences in rill erodibility between slope farmland and gully slope lands were mainly explained by the changes in root mass density (82.4%). Plant roots had strong direct effects on increasing Soil cohesion (0.78), organic matter content (0.56), and water stable aggregation (0.92). Rill erodibility was negatively related to root mass density as an exponential function (p
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Effects of landscape positions on Soil Resistance to rill erosion in a small catchment on the Loess Plateau
Biosystems Engineering, 2017Co-Authors: Ren Geng, Guang-hui Zhang, Hao WangAbstract:Landscape position has significant effects on Soil properties and plant roots, and thus probably affects Soil Resistance to rill erosion, reflected by rill erodibility and critical shear stress. However, the potential effects of landscape positions on Soil Resistance to rill erosion are still unclear. Therefore, this study was conducted to investigate the spatial variations in Soil Resistance to rill erosion under different landscape positions, and to identify the main factors controlling these variations in a small catchment of the Loess Plateau. 540 undisturbed Soil samples were collected from 18 typical sampling sites of natural succession grassland under six landscape positions and subjected to scour under different flow shear stresses. The results showed that landscape position significantly affected the spatial variation of rill erodibility. The mean rill erodibility decreased gradually from the top of ridge to footslope and increased linearly with elevation. Significant differences were detected in rill erodibility between three grass species. No significant difference was found in critical shear stress between six landscape positions. Soil erosion and Soil water content dominated the regular spatial changes of Soil properties and root mass density along six landscape positions. All of these factors collectively resulted in the regular decrease of rill erodibility from the top of ridge to footslope. A negative relationship was identified between critical shear stress and clay content. Rill erodibility could be satisfactorily estimated by the median Soil grain size, Soil cohesion, water stable aggregate and root mass density.
Ivica Kisić - One of the best experts on this subject based on the ideXlab platform.
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Influence of Bulk Density on Soil Resistance and Yield of Tobacco
2016Co-Authors: Ivan Turšić, Ivica Kisić, Milan Mesić, Aleksandar RaczAbstract:Influence of Soil compaction on the growth and development of flue-cured tobacco was investigated at the experimental station of the Tobacco institute Zagreb. Research was carried out in model trials, in Mitscherlich's pots. Three Soil compaction levels (1.2, 1.4 and 1.6 gcm -3 ) were randomized according to the block method with four replications. The Soil used in the trials was the plough Iayer of Luvisol, the Soil typical of the area in which flue-cured tobacco is grown in Croatia. Tobacco was picked in six harvests, and after the sixth harvest the tobacco root yield was determined by washing it out in a sieve. The Soil Resistance to penetration was measured during tobacco flowering, and a statistically significant increase of Soil Resistance (compaction) was recorded in the Soil with medium and the highest bulk density compared to that with the Iowest density, increased Soil compaction considerably reduced leaf yields and root development of tobacco. Tobacco leaf and root yields were significantly increased by intensified fertilization. The highest leaf and root yields were obtained in the lowest Soil compaction.
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Bulk density and Soil Resistance variability in different Soil moisture conditions under different tillage systems.
Cereal Research Communications, 2009Co-Authors: Krunoslav Sajko, Ivica Kisić, Ferdo Bašić, Mijo SabolićAbstract:Field experiment with 6 Soil tillage systems was set up on Stagnosol in Central Croatia in 1994. Tillage systems differed in tools that were used, depth and direction of tillage. 13 years after experiment establishment, oil seed rape was cover crop (season 2006/07). In 2007 Soil Resistance, bulk density and Soil water content data were collected in order to detect effects of different Soil tillage systems on Soil compaction. Data were obtained at 4 depths in different time intervals during vegetation period. Statistical data evaluation showed significant differences in Soil Resistance between all tillage systems at all depths. Soil Resistance varied at depth 0-10 cm from 0.46 to 2.82 MPa, at depth 10-20 cm from 0.85 to 3.85 MPa, at depth 20-30 cm from 1.02 to 5.01 and at depth 30-40 cm from 1.21 to 5.31 MPa. Bulk density values at all depths of all tillage systems varied from 1.46 to 1.73 g cm(-3). Soil water content during research period varied from 27 to 43%. It can be concluded that climate conditions differently affected Soil Resistance at different tillage practice
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Soil Resistance under different tillage methods
2002Co-Authors: Ivica Kisić, Ferdo Bašić, Milan Mesić, Anđelko ButoracAbstract:Increasing Soil compaction has become a global problem due to the use of ever larger and heavier tractors and attachments, i.e. more intensive tillage and also tillage under unfavourable conditions. As a consequence, low or decreasing yields are obtained due to increased bulk density of the Soil, which is also reflected in reduced infiltration and transmission of water into/through the Soil, lower pipe drainage efficiency and crop rooting depth, higher incidence of plant diseases and reduced root efficiency. Aimed at determining the optimal tillage system for the region, five-year penetration Resistance measurements, among others, were carried out on Stagnic Luvisol of the trial field "Freivogels Hill" near Daruvar in central Croatia. The trial included the following treatments: Standard plot, black fallow, ploughed up/down the slope ; 2. Conventional ploughing (till 25 cm) up/down the slope ; 3. No-tillage ; 4. Conventional ploughing across the slope (till 25 cm) ; 5. Very deep ploughing across the slope (50 cm) ; and 6. SubSoiling to the depth of 60 cm + conventional ploughing across the slope. Crops were sown in the following crop rotation: 1994/95 - maize, 1995/96 - soybean, 1996/97 - winter wheat, 1997/98 oil-seed rape, and 1998/99 - spring barley + soybean. Measurements of Soil Resistance to penetration to the depth of tillage in four repetitions, as the principal parameter of Soil compaction, were carried out continuously parallel to the plant cover growth and application of appropriate agricultural practices using the Bush Soil Recording Penetrometer. At the same time, samples were taken of the Soil while in disrupted state in order to determine its moisture. The five-year investigations point to the conclusion that the Soil Resistance to penetration is predominantly influenced by the effective state of the plant cover development, actual Soil moisture and the tillage system applied. The lowest penetration Resistance results in all trial treatments were recorded in the first measurements, immediately after the application of tilling practices. In treatments involving deep practices (very deep ploughing and subSoiling) penetration Resistance values were constant to the measurement depth whereas an increase was recorded in penetration Resistance below the ploughing depth in treatments with conventional ploughing to the depth of 25 cm. Soil Resistance to penetration recorded in the winter period was expressly low, one might say it was practically non-existent. According to the Soil Resistance values recorded in treatments with deeper Soil tillage, as well as the achieved yields, these treatments rendered the best results in the investigations.
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Soil Resistance under different tillage methods
2000Co-Authors: Ivica Kisić, Ferdo Bašić, Milan Mesić, Anđelko ButoracAbstract:Aimed at determining the optimal tillage method for the region, penetration Resistance measurements, among others, were carried out on stagnic podzoluvisols (pseudogley) of the trial field "Freivogels Hill" near Daruvar in central Croatia. Measurements of Soil Resistance to penetration to the depth of 50 cm in four repetition, as the principal parameter of Soil compaction, were carried out continuously parallel to the plant cover growth and application of appropriate agricultural practices using The Bush Soil Recording Penetrometer. At the same time, samples were taken of the Soil while in disrupted state in order to determine its moisture. The investigations point to the conclusion that the Soil Resistance to penetration is predominantly influenced by the effective state of the plant cover development, actual Soil moisture and the tillage method applied. The lowest penetration Resistance results in all trial treatments were recorded in first measurements, immediately after the application of tilling practices. In treatments involving deep practices (very deep ploughing and subSoiling till 50 cm) penetration Resistance values were constant to the measurement depth whereas an increase was recorded in penetration Resistance below the ploughing depth in treatments with conventional ploughing to the depth of 30 cm. Soil Resistance to penetration recorded in the winter period was expressly low, one might say it was practically non-existent. The overall lowest values of Soil Resistance to penetration throughout the investigation period were recorded in treatments with very deep ploughing and subSoiling or ploughing across the slope, while the highest penetration Resistance was determined in the no-tillage treatment, as a consequence of the tillage method applied in this treatment.
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Soil Resistance to penetration in different tillage methods
2000Co-Authors: Ivica Kisić, Ferdo Bašić, Milan Mesić, Anđelko ButoracAbstract:Aimed at determining the optimal tillage method for the region, four-year penetration Resistance measurements, among others, were carried out on stagnic podzouvisols of the trial field near Daruvar in central Croatia. The trial included the following treatments: Standard plot, Conventional ploughing up/down the slope, No-tillage, Conventional ploughing across the slope, Very deep ploughing across the slope (50 cm) and SubSoiling to the depth of 60 cm + conventional ploughing across the slope. Crops were sown in the following crop sequence: 1994/95 - maize, 1995/96 - soybean, 1996/97 - winter wheat, and 1997/98 oil rape. Measurements of Soil Resistance to penetration to the depth of 50 cm in four repetition, as the principal parameter of Soil compaction, were carried out continuously parallel to the plant cover growth and application of appropriate agricultural practices using The Bush Soil Recording Penetrometer. At the same time, samples were taken of the Soil while in disrupted state in order to determine its moisture. The four-year investigations point to the conclusion that the Soil Resistance to penetration is predominantly influenced by the effective state of the plant cover development, actual Soil moisture and the tillage method applied. The lowest penetration Resistance results in all trial treatments were recorded in first measurements, immediately after the application of tilling practices. In treatments involving deep practices (very deep ploughing and subSoiling) penetration Resistance values were constant to the measurement depth whereas an increase was recorded in penetration Resistance below the ploughing depth in treatments with conventional ploughing to the depth of 25-30 cm.
Anđelko Butorac - One of the best experts on this subject based on the ideXlab platform.
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Soil Resistance under different tillage methods
2002Co-Authors: Ivica Kisić, Ferdo Bašić, Milan Mesić, Anđelko ButoracAbstract:Increasing Soil compaction has become a global problem due to the use of ever larger and heavier tractors and attachments, i.e. more intensive tillage and also tillage under unfavourable conditions. As a consequence, low or decreasing yields are obtained due to increased bulk density of the Soil, which is also reflected in reduced infiltration and transmission of water into/through the Soil, lower pipe drainage efficiency and crop rooting depth, higher incidence of plant diseases and reduced root efficiency. Aimed at determining the optimal tillage system for the region, five-year penetration Resistance measurements, among others, were carried out on Stagnic Luvisol of the trial field "Freivogels Hill" near Daruvar in central Croatia. The trial included the following treatments: Standard plot, black fallow, ploughed up/down the slope ; 2. Conventional ploughing (till 25 cm) up/down the slope ; 3. No-tillage ; 4. Conventional ploughing across the slope (till 25 cm) ; 5. Very deep ploughing across the slope (50 cm) ; and 6. SubSoiling to the depth of 60 cm + conventional ploughing across the slope. Crops were sown in the following crop rotation: 1994/95 - maize, 1995/96 - soybean, 1996/97 - winter wheat, 1997/98 oil-seed rape, and 1998/99 - spring barley + soybean. Measurements of Soil Resistance to penetration to the depth of tillage in four repetitions, as the principal parameter of Soil compaction, were carried out continuously parallel to the plant cover growth and application of appropriate agricultural practices using the Bush Soil Recording Penetrometer. At the same time, samples were taken of the Soil while in disrupted state in order to determine its moisture. The five-year investigations point to the conclusion that the Soil Resistance to penetration is predominantly influenced by the effective state of the plant cover development, actual Soil moisture and the tillage system applied. The lowest penetration Resistance results in all trial treatments were recorded in the first measurements, immediately after the application of tilling practices. In treatments involving deep practices (very deep ploughing and subSoiling) penetration Resistance values were constant to the measurement depth whereas an increase was recorded in penetration Resistance below the ploughing depth in treatments with conventional ploughing to the depth of 25 cm. Soil Resistance to penetration recorded in the winter period was expressly low, one might say it was practically non-existent. According to the Soil Resistance values recorded in treatments with deeper Soil tillage, as well as the achieved yields, these treatments rendered the best results in the investigations.
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Soil Resistance under different tillage methods
2000Co-Authors: Ivica Kisić, Ferdo Bašić, Milan Mesić, Anđelko ButoracAbstract:Aimed at determining the optimal tillage method for the region, penetration Resistance measurements, among others, were carried out on stagnic podzoluvisols (pseudogley) of the trial field "Freivogels Hill" near Daruvar in central Croatia. Measurements of Soil Resistance to penetration to the depth of 50 cm in four repetition, as the principal parameter of Soil compaction, were carried out continuously parallel to the plant cover growth and application of appropriate agricultural practices using The Bush Soil Recording Penetrometer. At the same time, samples were taken of the Soil while in disrupted state in order to determine its moisture. The investigations point to the conclusion that the Soil Resistance to penetration is predominantly influenced by the effective state of the plant cover development, actual Soil moisture and the tillage method applied. The lowest penetration Resistance results in all trial treatments were recorded in first measurements, immediately after the application of tilling practices. In treatments involving deep practices (very deep ploughing and subSoiling till 50 cm) penetration Resistance values were constant to the measurement depth whereas an increase was recorded in penetration Resistance below the ploughing depth in treatments with conventional ploughing to the depth of 30 cm. Soil Resistance to penetration recorded in the winter period was expressly low, one might say it was practically non-existent. The overall lowest values of Soil Resistance to penetration throughout the investigation period were recorded in treatments with very deep ploughing and subSoiling or ploughing across the slope, while the highest penetration Resistance was determined in the no-tillage treatment, as a consequence of the tillage method applied in this treatment.
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Soil Resistance to penetration in different tillage methods
2000Co-Authors: Ivica Kisić, Ferdo Bašić, Milan Mesić, Anđelko ButoracAbstract:Aimed at determining the optimal tillage method for the region, four-year penetration Resistance measurements, among others, were carried out on stagnic podzouvisols of the trial field near Daruvar in central Croatia. The trial included the following treatments: Standard plot, Conventional ploughing up/down the slope, No-tillage, Conventional ploughing across the slope, Very deep ploughing across the slope (50 cm) and SubSoiling to the depth of 60 cm + conventional ploughing across the slope. Crops were sown in the following crop sequence: 1994/95 - maize, 1995/96 - soybean, 1996/97 - winter wheat, and 1997/98 oil rape. Measurements of Soil Resistance to penetration to the depth of 50 cm in four repetition, as the principal parameter of Soil compaction, were carried out continuously parallel to the plant cover growth and application of appropriate agricultural practices using The Bush Soil Recording Penetrometer. At the same time, samples were taken of the Soil while in disrupted state in order to determine its moisture. The four-year investigations point to the conclusion that the Soil Resistance to penetration is predominantly influenced by the effective state of the plant cover development, actual Soil moisture and the tillage method applied. The lowest penetration Resistance results in all trial treatments were recorded in first measurements, immediately after the application of tilling practices. In treatments involving deep practices (very deep ploughing and subSoiling) penetration Resistance values were constant to the measurement depth whereas an increase was recorded in penetration Resistance below the ploughing depth in treatments with conventional ploughing to the depth of 25-30 cm.
Damien Raclot - One of the best experts on this subject based on the ideXlab platform.
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Soil Resistance to interrill erosion: Model parameterization and sensitivity
CATENA, 2009Co-Authors: Silvio José Gumière, Yves Le Bissonnais, Damien RaclotAbstract:Abstract Interrill erosion, which is less visible in the landscape than rill and gully erosion, may cause major sediment deposits in the lower part of cultivated fields. It is often associated with runoff resulting from sealing and crusting, and Soil properties such as Soil detachability or Soil aggregate stability have been used to express Soil Resistance to interrill erosion processes, i.e., interrill erodibility. From a literature review including more than fifteen erosion models, we have identified three main methods used to measure these properties: aggregate stability and splash cup detachability, methods performed in the laboratory using only a few grams of Soil, and standard plot methods that are based on field plot measurements. This difference makes the parameters involved in assessing interrill erodibility dependent upon the scale and the hydrological processes involved and difficult to compare. According to the literature, the sensitivity of actual erosion models to interrill erodibility is lower than the sensitivity to hydrological properties and rill erodibility parameters. This numerical study shows that erodibility measurements from the three major assessment methods give different results regarding the contribution of interrill erosion and show that the sensitivity of erosion modeling to interrill erodibility may in fact be greater than shown in the literature on global sensitivity analysis.
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Soil Resistance to interrill erosion: parametrisation and model sensibility
CATENA, 2009Co-Authors: Silvio José Gumière, Yves Le Bissonnais, Damien RaclotAbstract:Interrill erosion, which is less visible in the landscape than rill and gully erosion, may cause major sediment deposits in the lower part of cultivated fields. It is often associated with runoff resulting from sealing and crusting, and Soil properties such as Soil detachability or Soil aggregate stability have been used to express Soil Resistance to interrill erosion processes, i.e., interrill erodibility. From a literature review including more than fifteen erosion models, we have identified three main methods used to measure these properties: aggregate stability and splash cup detachability, methods performed in the laboratory using only a few grams of Soil, and standard plot methods that are based on field plot measurements. This difference makes the parameters involved in assessing interrill erodibility dependent upon the scale and the hydrological processes involved and difficult to compare. According to the literature, the sensitivity of actual erosion models to interrill erodibility is lower than the sensitivity to hydrological properties and rill erodibility parameters. This numerical study shows that erodibility measurements from the three major assessment methods give different results regarding the contribution of interrill erosion and show that the sensitivity of erosion modeling to interrill erodibility may in fact be greater than shown in the literature on global sensitivity analysis
