SAND CULTURE STUDIES OF THE USE OF SALINE AND ALKALINE WATERS IN GREENHOUSES

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Abstract
Tomato plants were treated with separate series of solns. of NaCl and NaHCO3 to determine the limits of tolerance to these salts. The concs. of these salt solns. varied from 100 to 3000 ppm. Injury to the plant was based on the reduction in growth measured by the dry wts. Concs. of either salt > 1400-1600 ppm. proved extremely injurious. Chem. analyses were made to determine the ash, Ca, Mg, Si, and Na content of the plant. A discussion of the changes in the mineral composition effected by the application of increased amts. of the 2 salts is given.