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Value of Manure on an Irrigated Calcareous Soil
Author(s) -
Herron G. M.,
Erhart A. B.
Publication year - 1965
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1965.03615995002900030017x
Subject(s) - sorghum , calcareous , agronomy , manure , phosphorus , nitrogen , forage , environmental science , yield (engineering) , fertilizer , chemistry , materials science , geology , metallurgy , biology , organic chemistry , paleontology
Each ton of high quality manure was equivalent to 22 lb of nitrogen from ammonium nitrate as measured by equivalent grain sorghum ( Sorghum vulgare Pers.) yields over a 4‐year period. Phosphorus level of the soil by the Bray and Kurtz no. 1 procedure was increased by 1 ppm for each ton of applied manure. Commercial phosphorus fertilizer did not increase grain yields. Total N content of the surface soil was increased by all manure treatments. Nitrogen uptake by grain was correlated with relative yield of grain. The forage portion of sorghum appeared to take up N in excess of needs for maximum grain yield.