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A Five‐Year Comparison of Rock Phospate and Concentrated Superphospate for Several Forage Crops 1
Author(s) -
Jackson James E.,
Burton GLenn W.
Publication year - 1960
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/agronj1960.00021962005200120007x
Subject(s) - lime , phosphorite , forage , acre , agronomy , fodder , phosphate , phosphorus , environmental science , biology , chemistry , fertilizer , paleontology , biochemistry , organic chemistry
Synopsis Rock phosphate, at high rates, compared favorably with concentrated superphosphate. Sweet clover utilized rock phosphate more efficiently than other legumes when lime was also applied, but was very inefficient in the absence of lime. Six hundred pounds per acre of P 2 O 5 from rock, supplemented with 60 pounds from concentrated superphosphate applied the first year, resulted in more total forage during 5 years than did 120 pounds per acre of P 2 O 5 from concentrated super applied annually.