ISSN:
1573-5036
Keywords:
Glycine max
;
N fertilization
;
Soil NO 3 − −N residues
;
Soybean
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary During 1976 through 1978, 10N treatments (combinations of N application times and rates) were used in a corn study. Those treatments created different levels of soil NO 3 − −N content that were well-suited to a study of the influence of residual NO 3 − −N and applied N on soybean yield. In April 1979 we applied ammonium nitrate at rates of 0, 75, or 150 kg N/ha to three subplots formed from each of the whole plots (previous N treatment plots). With N fertilization in 1979, seed yield increased where the residual NO 3 − −N amount was less than 190 kg/ha but decreased where the residual amount was greater than 190 kg/ha. As the NO 3 − −N content in the soil increased by 1 kg/ha, the soybean yield increase due to N fertilization in 1979 decreased by approximately 4 kg/ha.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02143188
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