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Legume Productivity and Soil Nitrogen Dynamics in Lowland Rice-Based Cropping Systems
Rice (Oryza sativa L.) in wet season (WS) preceded by a dry season (DS) fallow, commonly practiced in rainfed lowlands, causes large losses of N through NO leaching and denitrification. TheExpand
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Efficient management of soil and biologically fixed N2 in intensively-cultivated rice fields
Abstract A decline in productivity in wetland rice has been detected in some intensively-cultivated experimental farms in Asia since the early 1980s. Increased doses of fertilizer N are being used inExpand
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Tillage Depth Influence on Soil Nitrogen Distribution and Availability in a Rice Lowland
Previous studies using artificial barriers at selected depths have shown the importance of N supply from soil below 15 cm to rice (Oryza saliva L.). Subsoil N availability and its use by wetlandExpand
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Rapid Textural Analysis for Saline and Alkaline Soils with Different Physical and Chemical Properties
In most soil testing laboratories, textural analysis is performed by the pipette method (PM) or by hydrometer. Objectives of this study were (i) to evaluate simplified methods that can be used forExpand
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Sustaining productivity of lowland rice soils: issues and options related to N availability
The subsistence rice farming of the prechemical era efficiently sustained the N status of soils by maintaining a balance between N loss and N gain from biological N2 fixation. Intensive monocroppingExpand
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Enhancing soil nitrogen use and biological nitrogen fixation in Wetland rice
The limited fossil fuel reserve available for manufacturing fertilizer nitrogen and the adverse effects of continued use of high fertilizer nitrogen doses on the environment call for a more efficientExpand
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Impact of balanced fertilization on nutrient acquisition, fibre yield of jute and soil quality in New Gangetic alluvial soils of India
Abstract Balanced fertilization not only enhances crop growth and yield but also improves its quality and soil health. This study was conducted to determine the best approach of fertilization forExpand
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Growth, dry-matter partitioning and yiel of sweet potato (Ipomoea batatas L.) as influenced by soil mechanical impedance and mineral nutrition under different irrigation regimes.
Sweet potato plants were grown under different irrigation regimes ranging from IW/CPE ratio 1.5, 1.2, 0.9, 0.6, 0.3 as well as rainfed control. At lower irrigation level, mechanical resistance ofExpand
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Effect of growing rice on nitrogen mineralization in flooded soil
Only a small fraction of the total organic N in soils is mineralized to the plant-available forms during a cropping season. The mineralization process and the availability of mineral N in soils areExpand
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