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Carolyne Dürr - One of the best experts on this subject based on the ideXlab platform.

  • Seedbed structure of major field crops as affected by cropping systems and climate: Results of a 15-year field trial
    Soil and Tillage Research, 2021
    Co-Authors: Jay-ram Lamichhane, Jean Boiffin, Hubert Boizard, Carolyne Dürr, Guy Richard
    Abstract:

    Seedbed structure directly or indirectly affects crop establishment by modifying seed-soil contact, acting as mechanical obstacles or modifying temperature, moisture and oxygen contents of seedbed as well as the dynamic of pests, pathogens and weeds. However, very few detailed descriptions of seedbed’s structure of major field crops exist to date, in terms of precise aggregate size distributions in relation to different factors including the cropping system (CS), soil and climatic conditions and their interactions. Here, we characterized Seedbeds of major European field crops across three CSs over a 15-year period (1991–2005) of a long-term field experiment. CS I was the succession of spring pea/winter wheat/oilseed rape/winter wheat. Likewise, CSs II and III were the succession of sugar beet/winter wheat/maize/winter wheat with different sowing dates based on two different decision rules aimed at: minimizing the risk of soil compaction in the CS II or maximizing the duration of the crop in the CS III. We classified three types of seedbed structure, namely fine (with >20 mm soil aggregates 20 mm soil aggregates >15 < 25 %), and coarse (with>20 mm soil aggregates >25 %). We found a statistically significant effect of CSs (P < 0.05), crops (P < 0.001), previous crops (P < 0.01) and year (P < 0.001) while no significant effect of wheel traffic (P> 0.05) and tillage (P > 0.05) was observed on the soil aggregates > 20 mm. No irreversible effect of the CSs was observed over the study period on seedbed structure and the consequent risks of generating coarser Seedbeds, which is unfavorable for crop establishment. This dataset offers a unique description of the seedbed structure variations for major European field crops. This information can be used for future simulation studies of crop emergence, using, for example, the SIMPLE model that has seedbed structure as one of the input variables.

  • Harnessing crop models to pinpoint the establishment quality of field crops under the 21 st century climate change: case studies of soybean and sugar beet in northern france
    2020
    Co-Authors: Jay-ram Lamichhane, Jean-noël Aubertot, Julie Constantin, Elana Dayoub, Philippe Debaeke, Pierre Maury, Céline Schoving, Carolyne Dürr
    Abstract:

    Ongoing climate change has been reported to have far-reaching impact on agriculture worldwide owing to increased mean temperatures, higher precipitation variability and higher frequency of extreme temperature events. However, there is paucity of information on the potential effect of climate change on crop establishment that includes three stages: seed germination, seedling emergence and beginning of competition among young plantlets. A better understanding on the evolution of seedbed conditions under future climate change not only facilitates adaptation of crops in their original area of production but also helps explore new areas that were not suitable in the past for a given field crop establishment, but may result opportune in the future. Here we used a model-based framework to pinpoint whether the establishment quality of soybean and sugar beet in northern France will be affected by future climate change. To this objective, we first parameterized the SIMPLE crop emergence model and tested its prediction quality on seed germination and seedling emergence in relation to temperatures, water content, and soil structure. We then performed a simulation study over the 2020-2100 period, for early, conventional and late sowing dates. We generated soil temperatures and water contents of Seedbeds for these three sowing dates using the STICS soil-crop model with the most pessimistic IPCC scenario (RCP 8.5). We then used these data to feed the SIMPLE crop emergence model to run simulations. Our results showed that, when analyzed by sowing date and for successive 20-year period from 2020 to 2100, there was a significant increase in average seedbed temperatures 30 days after sowing by 2 °C after 2060, while no change in cumulative rainfall 30 days after sowing was found, compared with the past. Emergence rate of sugar beet was generally higher for 2081-2100 while there was no significant change for that of soybean. Main causes of non-emergence for both crops were: seedling death due to clods or soil surface crust, non-germination, and seedling mortality due to drought. Our study shows that the use of future climate scenarios coupled with crop

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil & Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    Abstract This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50°N latitude, 3°E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17–0.25 g g −1 clay and 0.02 g g −1 organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004–2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0.15 to 0.30 (medium seedbed), >0.30 g g −1 (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content ( −1 ) but increased sharply for water contents over 0.17 g g −1 . Stage F1 was reached more rapidly (only 11 mm versus 19 mm cumulated rainfall) only for fine Seedbeds with less than 0.15 g g −1 of clods over 2 cm and with a low water content at sowing, The stage of 50% of soil surface covered with sedimentary crusts was reached for 85 mm for fine seedbed versus 120 mm for medium seedbed. The mean penetrometer resistance of dry crusts was 0.55 ± 0.43 MPa for stage F1 and 3.54 ± 0.83 MPa for a sedimentary stage; mean penetrometer resistance increased continuously with cumulated rainfall and was much lower for wet crusts. These quantitative data gathered under field conditions constitute the first step towards the prediction of soil surface crusting. The cumulative rainfalls were used in order to estimate the risk of occurrence of structural and sedimentary crusts forming during crop emergence with several types of Seedbeds.

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil and Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50 degrees N latitude, 3 degrees E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17-0.25 g g(-1) clay and 0.02 g g(-1) organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004-2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0. 15 to 0.30 (medium seedbed), >0.30 g g(-1) (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content (

  • Characterization of Sugar Beet Seedbed Structure
    Soil Science Society of America Journal, 1999
    Co-Authors: Jean-noël Aubertot, Carolyne Dürr, K. Kiêu, Guy Richard
    Abstract:

    Little information is available on the distribution and shape of aggregates or their spatial arrangement within Seedbeds, although it influences crop emergence. The aim of this study was to obtain quantitative information on seedbed structure by sampling soil layers, sieving, surface photographs, and stereological analysis of embedded sample sections. Seedbeds prepared with a combined implement (spring tine cultivator and rollers) in a silt loam soil (Typic Hapludalf) with two seeders (K and Pl) on plowed (P), not plowed (NP), and not plowed and compacted (NPC) plots, were analyzed. Aggregates were described by measurements of L, I, h, the longest, intermediate and shortest axes and visually classified according to their surface roughness (smooth, 0; to rough, 4). The D fitting parameter of the power-law aggregate size distribution after seeding was significantly smaller (3.4) on NPC than on the other plots (3.8-4.0). The aggregate aspect ratios (l/L and h/L) did not vary with aggregate size or plot, their overall means were 0.77 and 0.55 respectively. Aggregates of roughness classes >2 were 28 to 32% on NPC and NP plots, compared with 74% on P plot. Seeders reduced the number of aggregates >10 mm by one-third compared with the values before seeding. Seeder K placed over 60% of the aggregates > 20 mm on the soil surface. Aggregates were uniformly distributed across the row by K seeder and away from the center of the row by Pl seeder. The information obtained will be used in a computerized seedbed generator.

Aude Gallardo-carrera - One of the best experts on this subject based on the ideXlab platform.

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil & Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    Abstract This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50°N latitude, 3°E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17–0.25 g g −1 clay and 0.02 g g −1 organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004–2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0.15 to 0.30 (medium seedbed), >0.30 g g −1 (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content ( −1 ) but increased sharply for water contents over 0.17 g g −1 . Stage F1 was reached more rapidly (only 11 mm versus 19 mm cumulated rainfall) only for fine Seedbeds with less than 0.15 g g −1 of clods over 2 cm and with a low water content at sowing, The stage of 50% of soil surface covered with sedimentary crusts was reached for 85 mm for fine seedbed versus 120 mm for medium seedbed. The mean penetrometer resistance of dry crusts was 0.55 ± 0.43 MPa for stage F1 and 3.54 ± 0.83 MPa for a sedimentary stage; mean penetrometer resistance increased continuously with cumulated rainfall and was much lower for wet crusts. These quantitative data gathered under field conditions constitute the first step towards the prediction of soil surface crusting. The cumulative rainfalls were used in order to estimate the risk of occurrence of structural and sedimentary crusts forming during crop emergence with several types of Seedbeds.

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil and Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50 degrees N latitude, 3 degrees E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17-0.25 g g(-1) clay and 0.02 g g(-1) organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004-2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0. 15 to 0.30 (medium seedbed), >0.30 g g(-1) (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content (

  • Analysis and modelling of soil surface crusting and crop emergence. Contribution to the improvement of the SIMPLE model
    2006
    Co-Authors: Aude Gallardo-carrera
    Abstract:

    The SIMPLE model can predict the emergence of various types of crop. It includes an empirical module predicting seedling emergence from under a crust. That module is based on the observation of the emergence of sugar beet crops in a field network with silt loam soils. This module is basic, but effective, and the purpose of this work is to allow the extension of forecasts to other sowing conditions and other crops (seedbed types, soil types, different characteristics of the seeds), given the huge problems in crop emergence resulting from the formation of crusts on the surface of Seedbeds for various crops. Field experiments were carried out to characterize the different tactics used by the seedlings to break through (penetration, rupture and passage through cracks), according to the different types of crust, in the case of spring (sugar beet, flax and bean) and autumn crops (wheat). On the same plots, we characterized the dynamics of crust formation for the various initial states of Seedbeds (aggregate size, soil water content) according to the rains cumulated since sowing. We also analysed soil crusting data acquired on a long term experiment, thus complementing our two experimentation campaigns. The crusts were characterized by their stage, their thickness and their resistance to penetration. Various quantities of cumulated rains, from 11mm for Seedbeds mainly made of thin dry earth to 27mm for coarse soil surfaces, were determined in order to obtain the formation of structural crusts, which are already enough to penalize emergence if they dry out. Complementary experiments were led in the laboratory in order to obtain under simulated rainfalls more advanced stages of crust unobserved during the two years of experimentation in the field, and characterize them. We quantified the evolution of the forming network of cracks according to the degree of degradation and the moistening/desiccation alternation. Those data made it possible to parameterise and test geometrical models for the appearance of cracks. The forces exerted by the seedlings and their changes in time, according to the variations in the seed mass, the varieties and the species studied, were measured with force sensors in the laboratory. All those elements made it possible to build a new module integrating factors which had not been taken into account before when predicting emergence through crusts. This module integrates initial states for various Seedbeds (structure and water content) and different cumulated rain values which lead to successive stages in the formation of the crust. With each type of crust, a characteristic distribution of resistances is associated. The maximum force of every seedling that comes to the surface is drawn at random in a distribution, then decreases with the age of the seedling. That value is compared day after day with the resistance of the material via a coefficient that makes it possible to determine whether the seedling will emerge or not. That coefficient results from an adjustment to the data observed. It was based on sugar beet, a crop for which numerous and precise data were recorded. The first simulations carried out with this new module show the importance of the effects of the initial states of the Seedbeds on emergence rates. The effect of force differences due to the mass of the seeds is more limited (about 10% on average) but it reaches about 20% in certain sowing conditions. We also tested the possibility of using this coefficient for other crops, the force of which had been measured. The extension to other species gives encouraging results but requires additional work. We finally discuss the possibility of using various parameters measured on soils in the laboratory in order to be able to adapt the proposed model to other soil types.

Y. Duval - One of the best experts on this subject based on the ideXlab platform.

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil & Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    Abstract This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50°N latitude, 3°E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17–0.25 g g −1 clay and 0.02 g g −1 organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004–2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0.15 to 0.30 (medium seedbed), >0.30 g g −1 (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content ( −1 ) but increased sharply for water contents over 0.17 g g −1 . Stage F1 was reached more rapidly (only 11 mm versus 19 mm cumulated rainfall) only for fine Seedbeds with less than 0.15 g g −1 of clods over 2 cm and with a low water content at sowing, The stage of 50% of soil surface covered with sedimentary crusts was reached for 85 mm for fine seedbed versus 120 mm for medium seedbed. The mean penetrometer resistance of dry crusts was 0.55 ± 0.43 MPa for stage F1 and 3.54 ± 0.83 MPa for a sedimentary stage; mean penetrometer resistance increased continuously with cumulated rainfall and was much lower for wet crusts. These quantitative data gathered under field conditions constitute the first step towards the prediction of soil surface crusting. The cumulative rainfalls were used in order to estimate the risk of occurrence of structural and sedimentary crusts forming during crop emergence with several types of Seedbeds.

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil and Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50 degrees N latitude, 3 degrees E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17-0.25 g g(-1) clay and 0.02 g g(-1) organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004-2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0. 15 to 0.30 (medium seedbed), >0.30 g g(-1) (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content (

Joël Léonard - One of the best experts on this subject based on the ideXlab platform.

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil & Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    Abstract This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50°N latitude, 3°E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17–0.25 g g −1 clay and 0.02 g g −1 organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004–2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0.15 to 0.30 (medium seedbed), >0.30 g g −1 (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content ( −1 ) but increased sharply for water contents over 0.17 g g −1 . Stage F1 was reached more rapidly (only 11 mm versus 19 mm cumulated rainfall) only for fine Seedbeds with less than 0.15 g g −1 of clods over 2 cm and with a low water content at sowing, The stage of 50% of soil surface covered with sedimentary crusts was reached for 85 mm for fine seedbed versus 120 mm for medium seedbed. The mean penetrometer resistance of dry crusts was 0.55 ± 0.43 MPa for stage F1 and 3.54 ± 0.83 MPa for a sedimentary stage; mean penetrometer resistance increased continuously with cumulated rainfall and was much lower for wet crusts. These quantitative data gathered under field conditions constitute the first step towards the prediction of soil surface crusting. The cumulative rainfalls were used in order to estimate the risk of occurrence of structural and sedimentary crusts forming during crop emergence with several types of Seedbeds.

  • Effects of seedbed structure and water content at sowing on the development of soil surface crusting under rainfall
    Soil and Tillage Research, 2007
    Co-Authors: Aude Gallardo-carrera, Joël Léonard, Y. Duval, Carolyne Dürr
    Abstract:

    This study was carried out to observe the dynamics of crust formation on the soil surface under field conditions and analyse the effects of seedbed structure and water content on soil surface crusting. Seedbed sensitivity to crusting was also estimated in the laboratory by stability tests on aggregates. We observed 57 plots during the sowings of spring and autumn crops in fields in Northern France (Estrees-Mons, 50 degrees N latitude, 3 degrees E longitude). The soil is an Orthic Luvisol according to the FAO classification (0.17-0.25 g g(-1) clay and 0.02 g g(-1) organic matter on average). Visual assessments in situ were performed and photographs taken of crust stages on delimited areas, each 5 mm of cumulated rainfall since sowing. In 2004-2005, the Seedbeds were characterised by their distribution of aggregate sizes and tests of aggregate stabilities of surface samples kept with their water content at sowing. A penetrometer was used to measure crust resistance and estimate its thickness. These data were analysed to detect the cumulative rainfall values needed for the initiation and development of the successive stages of crusts. A fully developed structural crust (stage F1) required 13, 22, 27 mm cumulated rainfall respectively for Seedbeds with proportions of clods over 2 cm ranging from 0 to 0.15 (fine seedbed), 0. 15 to 0.30 (medium seedbed), >0.30 g g(-1) (coarse seedbed). Aggregate stability measured on samples kept at sowing water content was low for soil with low water content (

Gurjeet Gill - One of the best experts on this subject based on the ideXlab platform.

  • Integrated weed management in dry-seeded rice using stale Seedbeds and post sowing herbicides
    Field Crops Research, 2018
    Co-Authors: Manpreet Singh, Makhan S. Bhullar, Gurjeet Gill
    Abstract:

    Abstract Dry-seeded rice (DSR) grown with alternate wetting and drying water management (AWD) has recently been introduced in northwest India as an alternative to conventional puddled hand-transplanted rice which is labour, water and energy intensive. The aerobic seedbed of DSR can be extremely susceptible to invasion by diverse weed flora, and if weeds are not controlled effectively, yield losses can be very high. This study was undertaken to investigate the impacts of stale seedbed techniques on the soil weed seedbank and weed infestation in DSR, and to determine the influence of integration of the stale seedbed methods with post sowing herbicides on weed control and rice grain yield. The study, conducted in 2014 and 2015, comprised three seedbed treatments in main plots: without stale seedbed-conventional method, stale seedbed with glyphosate 1 kg ha−1andstale seedbed with shallow (5 cm) tillage, and four post sowing herbicide treatments in sub plots: unsprayed check, pendimethalin 0.75 kg ha−1 (pre-emergence), bispyribac-sodium 0.025 kg ha−1(post-emergence) and pendimethalin followed by bispyribac-sodium. The two stale seedbed treatments included one additional irrigation prior to sowing which increased weed seedling emergence prior to sowing by 1.9–2.2-fold; weeds in the stale seedbed treatments were then killed with the application of glyphosate or shallow tillage. At sowing, both stale seedbed treatments significantly decreased the viable seedbank of Echinochloa colona and Dactyloctenium aegyptium to 25–30% of that without a stale seedbed. After rice harvest, both stale seedbed treatments had a significantly lower seedbank than without a stale seedbed, by 13–33%; the stale seedbed with tillage had significantly lower seedbank at harvest than the stale seedbed with glyphosate in the second year. The sequential application of pendimethalin and bispyribac resulted in a significantly lower seedbank of both these grass weed species at harvest. At 20 DAS, both stale seedbed methods had 22–51% lower density of Cyperus rotundus and 42–67% less grass weeds than rice sown without a stale seedbed. There was more than a 2-fold increase in C. rotundus density from 2014 to 2015 without a stale seedbed and with the stale seedbed with glyphosate, and a 1.6-fold increase in the stale seedbed with tillage. In the absence of post sowing herbicides, the stale seedbed with tillage increased grain yield from 0.7–1.0 t ha−1 to 2.1–2.5 t ha−1, while the stale seedbed with glyphosate only increased grain yield in 2015. The combination of the stale seedbed with tillage, pendimethalin and bispyribac had the highest rice grain yield (7.3 t ha−1) and the highest economic returns ($ 1310 ha−1); the returns in this treatment were $ 260 ha−1 higher than using the same herbicides used without a stale seedbed. The results indicate that integrated use of a stale seedbed with shallow tillage followed by the sequential application of post sowing herbicides has potential to control the complex weed flora in dry-seeded rice. The reasons for greater consistency in weed control with the stale seedbed with tillage than glyphosate are unclear and need further investigation in dry seeded rice, as do the long term effects of use of stale Seedbeds.