Proceedings
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| Filter results2 paper(s) found. |
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1. An Overview of the Thompson/Baker Farming Systems StudyThere is a general lack of quantitative information, collected from field-scale studies, that can be used to assess long-term effects of alternative farming systems. The objective of an on-going study in central Iowa is to quantitatively evaluate several chemical, physical, biological, and economic parameters on the Richard Thompson (alternative) and Eugene Baker (conventional) farms. This project was initiated in 1989 on adjacent 32-ha tracts of land, that have Clarion loam, Nicollet loam, Canisteo... |
2. Enhancing Soil Nitrogen Availability in Corn-Based Cropping SystemsThe development of sustainable N management systems requires a better understanding of the contribution of on-farm resources to the active N pool size and its mineralization. This study explores the effect of substrate diversity and living corn roots on improving N supply through mineralization. A "diverse system", consisting of a corn (Zea mays L.)-corn-soybean (Glycine mar L.)-wheat (Triticum aesiiwrm L.) rotation with cover crops and fertilized with composted manure was compared with a corn monoculture... |