Studies on the varietal response of soybeans to nitrogen application level under different soil acidity, 2; effect of pH and nitrogen application on the growth and yield of soybean cultivars
1988
Lee, H.S. | Kwon, O.H. | Ahn, Y.T. (Seoul National Univ., Suwon (Korea R.). Coll. of Agriculture)
This study was carried out with two cultivars under two levels of pH and four levels of nitrogen fertilization in a field and nutriculture experiments to obtain the information about the effects of pH and nitrogen fertilization on the growth and yield of soybean. Acidic condition suppressed the growth of soybean plants, and thus yield and yield components of soybean decreased under acidic condition. But they increased with increased nitrogen fertilization. Especially, these respones were more remarkable under acidic condition in the variety Jangbaegkong. Grain yield of soybean were highly correlated with the content of allantoin and total nitrogen of soybean plants in the variety Jangbaegkong, but this was not in the variety Danyeobkong. The content of protein and fat of soybean seeds decreased under acidic condition, and more nitrogen fertilization increased the protein content, but decreased the fat content
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