Effects of land preparations and fertilization as soil management on corn yield grown on Lopburi Soil Series [Thailand]
1988
Satit Areerak
Bulk density of the soil tended to decrease when growing mungbean as green manure before growing corn, but was not different among land preparation practices. The soil moisture content from deep tillage practice was the highest when compared to no-tillage and conventional tillage practices. Corn growth rate from growing mungbean as green manure was significantly higher than that from no mungbean as green manure but they were difference among land preparation practices and rates of chemical fertilizer. Corn yield were significantly increased from 519 to 653 kg/rai when growing mungbean as green manure before growing corn, but yields were not effected by three different land preparation practices. The chemical fertilizer rate of 5-5-0 + 5-0-0 top dressing gave the highest corn yield (621 kg/rai). Nitrogen concentration in grain and stover were increased when mungbean was used as green manure. Phosphorus concentration in stover was decreased. Potassium concentration in grain and stover were not effected by green manure. Nitrogen uptake in corn was significantly increased when used mungbean as green manure.
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