Soil microorganisms are important for the stabilization and preservation of a good soil structure. Management practices can affect the diversity and population of microorganisms, which could beneficially change soil properties and promote a more sustainable dryland system. This study was established near Pontotoc, MS on Atwood silt loam to evaluate the impacts of cover crops and fertilizer sources on selected biologically related soil properties in a no-tillage, dryland soybean system. Soil analyses included total carbon and nitrogen, permanganate oxidizable carbon (POXC), easily extractable glomalin-related soil protein (EE-GRSP), water stable aggregate (WSA) and soil pH. Cover crop biomass and percent groundcover, soybean leaf area index (LAI), plant height, and yield were also determined. Results indicated that fertilizer source did have an impact on total nitrogen, EE-GRSP, and soybean yield. A positive impact on soil properties is expected with the use of cover crops if studied for a longer period of time.
|Advisor:||Shankle, Mark, Shanmugam, Shankar G.|
|Commitee:||Cox, Michael S., Jones, Keri, Tewolde, Haile|
|School:||Mississippi State University|
|Department:||Plant and Soil Sciences|
|School Location:||United States -- Mississippi|
|Source:||MAI 82/2(E), Masters Abstracts International|
|Keywords:||Biological properties, Cover crops, Dryland, Poultry litter, Soil microorganisms, Soybean|
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