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Crop Response to Manganese Sources Applied with Ortho‐ and Polyphosphate Fertilizers
Author(s) -
Mortvedt J. J.,
Giordano P. M.
Publication year - 1975
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/sssaj1975.03615995003900040048x
Subject(s) - polyphosphate , diammonium phosphate , phosphate , ammonium polyphosphate , chemistry , manganese , avena , agronomy , phosphorite , forage , phosphorus , nutrient , ammonium , ammonium phosphate , environmental chemistry , fertilizer , raw material , organic chemistry , biology
Fine MnSO 4 , MnO, and MnEDTA were applied alone or with various granular and fluid ortho‐ and polyphosphate fertilizers to a Mn‐deficient Maumee 1s in three greenhouse pot experiments. Other nutrients were applied uniformly to the soil at nonlimiting rates. Forage yields and Mn uptake by oats ( Avena sativa L.) were increased by all Mn applications. All three Mn sources applied alone were equally effective, but forage yields and Mn uptake were generally higher when these sources were applied with the phosphates. The Mn‐containing fertilizers were more effective with banded than with mixed application. The granular fertilizers in decreasing order of effectiveness as carriers of MnSO 4 or MnO were: monoammonium phosphate, diammonium phosphate, and ammonium polyphosphate. Fluid polyphosphates generally were less effective than granular fertilizers as carriers of MnSO 4 or MnO. This was related to formation of Mn‐phosphate reaction products of differing plant availability. Chelated Mn (MnEDTA) did not react with polyphosphates and was quite effective for plants when applied with all phosphate fertilizers.