SOIL AND CROP RESPONSES FROM FIELD APPLICATIONS OF SOIL CONDITIONERS

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Abstract
The effect of Krilium and related polymeric soil conditioners on the physical properties of heavy-textured Miami, Crosby, Brookston and Paulding soils was studied. Applns. at rates varying from 0.02 to 0.20% in powder form to these soils in the field, with subsequent mixing by disking and rototilling, invariably increased soil aggregation and such related characters as porosity and permeability. Large crumbs (aggregates larger than 2 mm.) were most commonly produced, total aggregation often exceeding 80%. Moreover, the aggregates proved to be water-stable and the conditioning chemicals highly resistant to decomposition. Structural improvement persisted through the 2d growing season. The effect of Krilium treatment on the growth of many crops was tested in statistically controlled field expts. Not all crops responded to treatment, although in many instances yields increased appreciably. Corn, oats, and carrots were most responsive to conditioner treatment. No toxicities were noted.

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