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Recent advances in fertilizer placement. I. Fertilizer placement for swedes and turnips in Scotland
Author(s) -
Reith J. W. S.
Publication year - 1954
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740050906
Subject(s) - potash , fertilizer , nitrogen , agronomy , chemistry , mathematics , biology , organic chemistry
During 1947‐52 over 40 field experiments were carried out to compare broadcast and band applications of sulphate of ammonia, superphosphate, muriate of potash, 40% potash salts and two granular NPK fertilizers. Placement positions at distances up to 3 in. to the side of the row and up to 3.5 in. below the soil surface were examined by using a special drill machine developed by the National Institute of Agricultural Engineering. Placing superphosphate directly below the seed at a depth of about 3.3.5 in. from the soil surface has consistently given higher yields than placing it in other positions or broadcasting. The results show that there is no advantage in placing sulphate of ammonia, and that placing it directly below the seed may be harmful to early growth. There is no benefit or disadvantage from placing muriate of potash (60% of K 2 O), but with 40% potash salts broadcasting is likely to be better than placing below the seed. With NPK fertilizer mixtures there does not appear to be any benefit from placing, and this seems to be due to the positive effect from superphosphate being counterbalanced by the negative effect from a mixture of nitrogen and potash.