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A Comparison of the Efficiency of Eighteen Sources of Phosphate Fertilizers on Houston Black Clay
Author(s) -
Bennett O. L.,
Longnecker T. C.,
Gray Carl
Publication year - 1954
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/sssaj1954.03615995001800040014x
Subject(s) - phosphate , phosphorite , phosphorus , chemistry , pyrophosphate , agronomy , ammonium nitrate , sodium , yield (engineering) , potassium , ammonium , biology , materials science , biochemistry , organic chemistry , metallurgy , enzyme
A five‐year study was made to determine the efficiency of 18 phosphate fertilizers and amendments in 3 by 3 foot soil frames under simulated field conditions. A uniform application of 120 pounds of P 2 O 5 per acre from each source of phosphorus was made. Treatments were set up in two identical series, one cropped to legumes and the other to grass. Total yields were taken on each harvest and chemical analyses were made on legumes and Sudangrass. Total yields and chemical composition indicated that: 1. Most soluble forms of phosphate fertilizers gave significant increases in yield for both grasses and legumes. 2. Phosphate materials such as colloidal phosphate, defluorinated rock, and tricalcium phosphate were of little value on this type of soil, although defluorinated rock appeared to be better than the other two. 3. Such materials as sodium silicate and magnesium nitrate had very little effect on yield when used alone. When sodium silicate was used in combination with 20% superphosphate, a slight depressing effect on yield was noted. 4. Plant analyses showed very little differences due to source of phosphorus. 5. Sodium pyrophosphate and mono‐ammonium phosphate produced higher yields on the average than 20% superphosphate or 45% superphosphate, but the differences were not significant at the 5% level.