The Effect of HPAN and IBMA on the Fixation and Availability of Potassium in Several Ohio Soils
1957
Jones, M. B. | Pratt, P. F. | Martin, W. P.
Solutions of K salts with and without conditioner were added to four soils in sufficient solution to bring the soils approximately to field capacity. The conditioners were HPAN (hydrolized polyacrylonitrile) and IBMA (isobutylene maleic acid). The treated soils were incubated for several days, oven-dried at 68°C., and K fixation against extraction with NH₄OAc was determined. The results indicated that K fixation was reduced by the conditioner treatments. In a pot experiment, using corn and Sudangrass as assay plants, K was added at 2 levels with and without conditioner on 2 Ohio soils. High levels of N and P were added to all pots so that they would not be limiting factors. The yield and K content of corn and Sudangrass were greater on pots treated with conditioner and K than on pots treated with either alone. Possible explanations for the reduction in K fixation and greater availability of K resultant from treatment with conditioners are presented.
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