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The Effect of Organic and Inorganic Fertilizer and Organic Manure on the Yield and Yield Components of Soybean
Thesis Abstract:
The effects of organic manure (rice straw at 25 tons.ha and chicken manure at 5 tons/ha) applied singly or in combination with organic (Sagana 100, Fertilaid) and inorganic (30-30-0, 6-9-15) fertilizers on the yield and yield components of soybean variety Clark 63 were studies at the College Experimental Station, UPLB, during the 1977 wet season.
Results showed that among the various treatments, chicken manure increased the number of pobs and filled-pods per plant, 100-seed weight, total dry-matter yield, NPK content of the plant and total N accumulation. This treat also reduced lodging rate, resulting in the highest grain yield.
The addition of Inorganic fertilizer (3-30-0 kg N and P/ha) in the organic manure-treated plots resulted in the production of the highest average number of seeds per pod and grain yield. However, in plots without organic manure, the application of inorganic fertilizer 6-9-15 (F2) produced higher grain yields than those fertilized with 30-30-0 (F1).
In non-manured plots, 6-9-15 (F2) gave the highest grain yield and seed weight; Sagana 100 (F3), the highest number of pods and filled-pods per plant and number of branches; and 30-30-0 (F1), the highest number of seeds per pod. Although lowest in number of branches, 6-9-15 (F2) was second in number of pods and filled-pods per plant, resulting in higher grain yield than the other inorganic fertilizer.
Interaction between organic manure and fertilizer treatments markedly affected dry-matter production, shoot-root ratio and number of nodules