Erosional effects on soil properties and corn (Zea mays L.) yield on a Miamian soil in Ohio

ABSTRACT Effects of severity of erosion on soil physical properties and corn growth and yield were evaluated on a farm for a Miamian soil in Ohio for 1993 and 1994 seasons. The depth to carbonates, total porosity, and silt content decreased while soil bulk density (pb), clay content and pH increased with increase in severity of erosion. Corn growth and yield were adversely affected by erosion in 1993, when precipitation was lower than normal. Yield reductions in corn grain yield by severe erosion were 29.2% compared to slight erosion, and 32.7% compared to the depositional phase. No clear trend was observed for corn grain yields in 1994, probably due to sufficient rainfall during the grain-fill stage. A regression equation relating corn grain yield (Y) to soil properties in 1993 was Y = 23.9 - 7.11 pb - 0.163 Clay - 0.919 pH (R2 = 0.36∗∗), where the yield is in Mg/ha, soil pb is in Mg/m3, clay is in %, and pH is 1:1 in H2O.

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