施肥に依る亜酸化鉄の生成に就て(承前)

抄録

The previous report on this subject (J. Science of Soil and Manure (Japan.) VII, 120,1933.) dealt with the results on the same subject which were obtained under laboratory conditions, in flasks and pots. In this investigation, the same procedure was carried out in the field, in a larger scale and obtained the similar results to those which were previously reported except some ferrous iron were found even in the control and ammonium sulfate section.