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Dry Matter Accumulation in Soybean ( Glycine max (L) Merrill) Plants As Influenced by N, P, and K Fertilization 1
Author(s) -
Hanway J. J.,
Weber C. R.
Publication year - 1971
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1971.00021962006300020020x
Subject(s) - dry matter , dry weight , human fertilization , agronomy , biology , fertilizer , yield (engineering) , growing season , horticulture , metallurgy , materials science
Dry matter accumulation in the different parts of soybean plants grown on plots with different fertilizer treatments was determined at successive developmental stages throughout the growing season. Moderate applications of P and K fertilizers had relatively small effects on weights of the different plant parts or seed yields, but heavy applications of KC1 significantly reduced plant weights and seed yields. N fertilizer markedly increased yield of non‐nodulated soybeans. With adequate N (672 kg N/ha), seed yields of nodulated and non‐nodulated soybeans were similar. To produce a final plant weight of 10,000 kg/ha, the average daily increase in dry weight of plants was 186 kg/ha/day between stages 5 and 9. Rapid increase in seed yield began at about stage 8 and continued to stage 10. Other plant parts lost weight after stages 8 or 9. At maturity, dry matter consisted of 28% fallen leaves, 15% fallen petioles, 17% stems, 11% pods, and 29% beans.