Ameliorating caustic properties of aluminum extraction residue to establish a vegetative cover.

High pH, electrical conductivity (E.C.), and extractable Na levels in the residue remaining after aluminum was extracted from bauxite were greater than can support vigorous plant growth.

Preparation and analysis of cyclotri- and cyclotetraphosphate and their hydrolysis products in soil.

Cyclotriphosphate (Na(3)P(3)O(9)) and cyclotetraphosphate (Na(4)P(4)O(12)) are not strongly sorbed by soil constituents. Potential movement and efficient plant utilization of P from these compounds are dependent on the hydrolysis of the cyclophosphate ring structure and their hydrolysis products. The objectives of this study were to prepare pure useable quantities of these cyclophosphates and their hydrolysis products and to extract, separate, and analyze these compounds after application to diverse soils.