Expts. were undertaken to study temp, and other factors affecting salt tolerance with certain indicator plants. Water culture, soil culture and field plots were included. A constant temp. germinator was employed and chem. detns. were made with soils used.[long dash]Temperature is a dominant factor in the germination and growth of plants under saline or alkaline conditions. Strawberry clover was the most promising resistant legume for saline conditions, followed by sweet clover and then alfalfa. Chem. analyses show; marked improvement of treated plats over those of checks with restoration of Ca for Na in the exchange complex, improved reaction, decreased salt conc, higher level of organic matter and N, a tendency to increase base exchange capacity and useful water capacity or moisture equivalent. The crop yields obtained under field conditions substantiate the chemical results. The S-oxidizing power of reclaimed soil was greater than that of the virgin alkali soil. Various treatments increased nitrate N.