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Continuando a publicação dos resultados obtidos em ensaios de adubação do milho com diversos fosfatos, os autores relatam três que foram conduzidos, sempre nos mesmos canteiros, de 1941-42 a 1944-45. Um dêles foi instalado em solo arenito Bauru, na Estação Experimental de Pindorama; os outros dois. em terra-roxa-misturada, nas Estações Experimentais de Tatuí e Limeira. No ensaio de Limeira, numa área muito deficiente de Fósforo, farinha de ossos se mostrou inferior a superfosfato, e, apatita de Ipanema, muito inferior a qualquer dos outros adubos; nos de Tatuí e Pindorama, conduzidos em solos que só no útlimo ano responderam moderadamente à adição de fósforo, os fosfatos estudados tiveram efeitos equivalentes. The authors report the results of further experiments designed to test the efficiency of various phosphates for corn. This second series consists of three experiments which were conducted in the same plots from 1941-42 to 1944-45 at three localities of the State of São Paulo. In one experiment, located on an area of "terra-roxa-misturada" soil highly deficient in phosphorus, superphosphate was fairly superior to bone meal and much superior to ground apatite (from Ipanema, São Paulo). In the other experiments, one of which was located also on "terra-roxa-misturada" soil and the second on "arenito Bauru" 6oiL both in areas which only in the fourth year showed a moderate response to the phosphorus additions, the three phosphates gave similar results

Adubação do milho: XVI - Ensaios com diversos fosfatos (2.ª série)