Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 November 1972
Published in Agron J 64:743-746 (1972)
© 1972 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Fertilizer Nitrogen, Phosphorus, and Potassium on Yield and Nutrient Content of Lee Soybeans1

M. S. Bhangoo and D. J. Albritton2

Further studies on mineral nutrition of soybeans [Glycine max (L.) Merrill] were needed for better understanding of the relationship between the nutrient contents of the grain and leaf tissue in relation to grain yield as influenced by N, P, and K fertilization.

Field experiments with ‘Lee’ soybeans were conducted over a 3-year period on a Calloway silt loam in southeast Arkansas to obtain data on the effects of various rates and combinations of N, P, and K (112 kg N/ha, 40 kg P/ha, and 75 kg K/ha) fertilizers on grain yield and on the elemental content of leaf tissue and the grain.

Marked yield increases were obtained from N and K fertilizers and from various NPK combinations. Yield increases from N ranged from 10 to 15%, and from K, from 9 to 19%. Yield increases in 1967, 1968, and 1969 from NPK over the check were 32.8, 28.3, and 14.7%, respectively.

Fertilizer application increased the N and K content of both the leaves and grain and depressed their Ca and Mg content. Soybean yield showed a positive correlation with the N and K and negative correlation with the Ca and Mg content of grain and leaf tissue. Elemental content of the leaf tissue declined with plant age.

Key Words: Glycine max (L.) Merrill • Mineral nutrition • Chemical composition of grian and leaf tissue • Growth stages

1 Contribution from the Department of Agriculture, Arkansas Agricultural, Mechanical and Normal College, Pine Bluff, Ark. This research was partially supported by the Cooperative State Research Service, USDA, under Grant No. 716-15-25. Published with the approval of the Vice President for Academic Affairs, Research and Development, the Dean of the Division of Agriculture and Technology, and the Director of Agriculture as Paper No. 1 of the Journal Series.

2 Professors of Agronomy, Arkansas Agricultural, Mechanical and Normal College, Pine Bluff, Ark.

Received for publication September 24, 1971.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
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Environmental Quality		 The Plant Genome
Copyright © 1972 by the American Society of Agronomy.