The Experts below are selected from a list of 1761 Experts worldwide ranked by ideXlab platform
Cherrnor S Kamara - One of the best experts on this subject based on the ideXlab platform.
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characterization of the mangrove Swamp rice Soils along the great scarcies river in sierra leone using principal component analysis
Catena, 2018Co-Authors: Idriss Baggie, Foday Sumah, Sander J Zwart, Patrick A Sawyerr, Tamba Bandabla, Cherrnor S KamaraAbstract:Abstract Mangrove Swamp rice cultivation is important for food security in some countries of West Africa including Sierra Leone. In this agro-ecology, rice is cultivated during the rainy season when freshwater flows in the rivers and salt and acidity concentrations have reduced to non-toxic levels. Rice yields in the mangrove ecosystem of Sierra Leone are higher than in other agro-ecologies and weed, disease and pest pressures are minimal. However, salinity, acidity and crabs negatively affect rice productivity in the mangrove Swamps. Due to the differences in levels of flooding, salinity and acid sulphate conditions of mangrove Swamp Soils, it is assumed that there is variability of soil properties of mangrove Swamps along the associated river, which may impact the choice of suitable rice varieties and soil management practices. The purpose of this study was to understand the soil physical and chemical properties of mangrove Swamp Soils along the Great Scarcies River of Sierra Leone. A soil sampling survey was designed and implemented using transects to collect composite soil samples of 1 ha area at 0–0.2 m depth at 11 different sites located from the estuary of the Great Scarcies River to approximately 35 km inland. The soil samples were air-dried, processed and analyzed for selected physical and chemical properties by recommended methods. Statistical analysis generated mean, standard deviations, coefficient of variation, correlation matrix and principal components. The high variability in soil physical and chemical characteristics of mangrove Swamp Soils along the Great Scarcies River could be attributed to the complex interactions between the twice daily tidal inundations and depositions of soil organic matter, physical particles and nutrients onto the mangrove Swamp Soils along the river. The result of this is a soil fertility gradient down-stream.
Sander J Zwart - One of the best experts on this subject based on the ideXlab platform.
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characterization of the mangrove Swamp rice Soils along the great scarcies river in sierra leone using principal component analysis
Catena, 2018Co-Authors: Idriss Baggie, Foday Sumah, Sander J Zwart, Patrick A Sawyerr, Tamba Bandabla, Cherrnor S KamaraAbstract:Abstract Mangrove Swamp rice cultivation is important for food security in some countries of West Africa including Sierra Leone. In this agro-ecology, rice is cultivated during the rainy season when freshwater flows in the rivers and salt and acidity concentrations have reduced to non-toxic levels. Rice yields in the mangrove ecosystem of Sierra Leone are higher than in other agro-ecologies and weed, disease and pest pressures are minimal. However, salinity, acidity and crabs negatively affect rice productivity in the mangrove Swamps. Due to the differences in levels of flooding, salinity and acid sulphate conditions of mangrove Swamp Soils, it is assumed that there is variability of soil properties of mangrove Swamps along the associated river, which may impact the choice of suitable rice varieties and soil management practices. The purpose of this study was to understand the soil physical and chemical properties of mangrove Swamp Soils along the Great Scarcies River of Sierra Leone. A soil sampling survey was designed and implemented using transects to collect composite soil samples of 1 ha area at 0–0.2 m depth at 11 different sites located from the estuary of the Great Scarcies River to approximately 35 km inland. The soil samples were air-dried, processed and analyzed for selected physical and chemical properties by recommended methods. Statistical analysis generated mean, standard deviations, coefficient of variation, correlation matrix and principal components. The high variability in soil physical and chemical characteristics of mangrove Swamp Soils along the Great Scarcies River could be attributed to the complex interactions between the twice daily tidal inundations and depositions of soil organic matter, physical particles and nutrients onto the mangrove Swamp Soils along the river. The result of this is a soil fertility gradient down-stream.
Idriss Baggie - One of the best experts on this subject based on the ideXlab platform.
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characterization of the mangrove Swamp rice Soils along the great scarcies river in sierra leone using principal component analysis
Catena, 2018Co-Authors: Idriss Baggie, Foday Sumah, Sander J Zwart, Patrick A Sawyerr, Tamba Bandabla, Cherrnor S KamaraAbstract:Abstract Mangrove Swamp rice cultivation is important for food security in some countries of West Africa including Sierra Leone. In this agro-ecology, rice is cultivated during the rainy season when freshwater flows in the rivers and salt and acidity concentrations have reduced to non-toxic levels. Rice yields in the mangrove ecosystem of Sierra Leone are higher than in other agro-ecologies and weed, disease and pest pressures are minimal. However, salinity, acidity and crabs negatively affect rice productivity in the mangrove Swamps. Due to the differences in levels of flooding, salinity and acid sulphate conditions of mangrove Swamp Soils, it is assumed that there is variability of soil properties of mangrove Swamps along the associated river, which may impact the choice of suitable rice varieties and soil management practices. The purpose of this study was to understand the soil physical and chemical properties of mangrove Swamp Soils along the Great Scarcies River of Sierra Leone. A soil sampling survey was designed and implemented using transects to collect composite soil samples of 1 ha area at 0–0.2 m depth at 11 different sites located from the estuary of the Great Scarcies River to approximately 35 km inland. The soil samples were air-dried, processed and analyzed for selected physical and chemical properties by recommended methods. Statistical analysis generated mean, standard deviations, coefficient of variation, correlation matrix and principal components. The high variability in soil physical and chemical characteristics of mangrove Swamp Soils along the Great Scarcies River could be attributed to the complex interactions between the twice daily tidal inundations and depositions of soil organic matter, physical particles and nutrients onto the mangrove Swamp Soils along the river. The result of this is a soil fertility gradient down-stream.
Nianpeng He - One of the best experts on this subject based on the ideXlab platform.
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changes to soil organic matter decomposition rate and its temperature sensitivity along water table gradients in cold temperate forest Swamps
Catena, 2020Co-Authors: Hongfeng Bian, Shuai Zheng, Li Xu, Zhi Chen, Nianpeng HeAbstract:Abstract High-latitude forest Swamp soil stores a large amount of carbon (C), because of its anaerobic condition and lower temperature. The combination of decreasing water table by artificial drainage and climate warming exert a considerable influence on soil C storage. In this study, we explored how the soil organic matter decomposition rate (Rs) and its temperature sensitivity (Q10) are altered with water-table gradients in high-latitude Swamp soil. We sampled soil from cold-temperate forest Swamps at three water-table gradients (permanently flooded, seasonally flooded, and non-flooded) in the high-latitude areas of Genhe and Mohe in China. We then conducted an incubation experiment using a new mode of varying incubation temperature, with rapid and continuous measurements of Rs. Our results showed that Rs at 20 °C (R20) was significantly higher in seasonally flooded (SF) Swamp soil, compared to permanently flooded (PF) or non-flooded (NF) soil. Soil redox condition mainly controlled R20 during the early drying stage of forest Swamps, while substrate quantity and quality dominated the latter stage. The highest Q10 was observed in SF Soils in Genhe, but this was not significant compared to the Q10 in Soils from Mohe. There were clear regional differences in Q10 driven by changes to soil substrate (dissolved organic C and nitrogen) and physicochemical properties. Our findings indicate that high-latitude forest Swamp Soils may emit more CO2 and act as a C source under the scenarios of artificial draining and climate warming.
Yuana Nurulita - One of the best experts on this subject based on the ideXlab platform.
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assessment of the influence of oil palm and rubber plantations in tropical peat Swamp Soils using microbial diversity and activity analysis
Journal of Agricultural Chemistry and Environment, 2016Co-Authors: Yuana Nurulita, Eric M Adetutu, Krishna K Kadali, Esmaeil Shahsavari, Delita Zul, Mohamed Taha, Andrew S BallAbstract:In this study, tropical peat Swamp Soils from Giam Siak Kecil-Bukit Batu Biosphere Reserve (GSKBB) in Indonesia was evaluated to assess the impact of oil palm and rubber plantations on this unique organic soil through comparisons with Soils from a natural forest using a polyphasic approach (chemical and molecular microbial assays). Changes in the ammonium, nitrate and phosphate concentration were observed in Soils converted to agricultural use. Soil enzyme activities in plantation Soils showed reduced β-glucosidase, cellobiohydrolase and acid phosphatase activities (50% - 55% decrease). PCR-DGGE based analysis showed that the soil bacterial community from agricultural Soils exhibited the lowest similarity amongst the different microbial groups (fungi and Archaea) evaluated (34% similarity to the natural forest soil). Shannon Diversity index values showed that generally the conversion of tropical peatland natural forest to rubber plantation resulted in a greater impact on microbial diversity (ANOVA p < 0.05). Overall, this study indicated substantial shifts in the soil microbial activity and diversity upon conversion of natural peatland forest to agriculture, with a greater change being observed under rubber plantation compared to oil palm plantation. These findings provided important data for future peatland management by relating changes in the soil microbial community and activities associated to agricultural practices carried out on peatland.
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tropical peat Swamp Soils the impact of agricultural and restoration practices on activity and diversity of the soil microbial community
2016Co-Authors: Yuana NurulitaAbstract:Although occupying just 3-4% of the world’s landmass covering temperate, boreal and tropical areas, peatlands play an important role in conserving biodiversity and as a carbon sink. Current intensification of agricultural activities, especially
