Soil aggregate stability

Article Abstract:

Fields managed with alternative methods showed greater water stability of soil aggregates. Clarion loam farmed alternatively near Boone, IA, had more organic matter and lower bulk density than conventionally farmed soil. The prime factors of the alternative system were rotations using hay and oat crops, ridge tillage and use of manure/sludge mixtures. The improved stability will probably reduce erosion losses and improve soil water regimes.

Soil structure, Soil stabilization

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Infiltration techniques

Article Abstract:

Small single ring infiltrometers proved to be most effective for measuring soil infiltration in Clarion loam and Webster silty clay loam. They proved superior to rainfall simulators, tension infiltrometers, and double ring infiltrometers for comparing soil infiltration in conventionally managed and alternatively managed farms. This is helpful for quantitatively comparing the two farming techniques.

Measurement, Seepage, Seepage (Hydrology), Soil moisture

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Earthworm population density and species diversity

Article Abstract:

Amount of tillage influenced earthworm species and populations in Clarion-Nicollet-Webster soil in Polk County and Boone County, IA. Greater tillage generally resulted in lower earthworm populations, which can decrease soil quality for crop raising. Sites using minimum tilling and alternative crop and soil management had the greatest populations.

Environmental aspects, Agricultural ecology, Earthworms, Tillage, Cultivation (Land)

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