6 Result(s)
within
S. P. Deng
Life Sciences
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Article
Long-term cattle manure application in soil. II. Effect on soil microbial populations and community structure
Studies were conducted to evaluate microbial populations and community structures in soils under different management systems in a long-term continuous winter wheat experiment. These soils had been treated wit...
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Article
Characterization of active nitrogen pools in soils under different crop** systems
Studies were conducted to evaluate the relationships among different active N pools of organic matter in soils at two long-term crop** systems in Iowa. Results indicated that multi-crop** systems, particu...
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Article
Effect of crop** systems on nitrogen mineralization in soils
Understanding the effect of crop** systems on N mineralization in soils is crucial for a better assessment of N fertilizer requirements of crops in order to minimize nitrate contamination of surface and gro...
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Article
Effect of tillage and residue management on enzyme activities in soils: III. Phosphatases and arylsulfatase
This study was carried out to investigate the effect of tillage and residue management on activities of phosphatases (acid phosphatase, alkaline phosphatase, phosphodiesterase, and inorganic pyrophosphatase) ...
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Article
Effect of tillage and residue management on enzyme activities in soils
Recent interest in soil tillage and residue management has focused on low-input sustainable agriculture. In this study we investigated the effect of three tillage systems (no-till, chisel plow, and moldboard p...
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Article
Effect of tillage and residue management on enzyme activities in soils
In this study we investigated the effect of tillage and residue management on activities of glycosidases, including cellulase, α-and β-glucosidases, and α-and β-galactosidases. The land treatments included thr...
