EFFECT OF IRRIGATION WATER CONTAINING RSC ON THE YIELD, CHEMICAL COMPOSITION AND UPTAKE OF NUTRIENTS BY PERIWINKLE LEAVES

A field experiment was conducted during 1995–96 to examine the effect of RSC irrigation water on the yield, chemical composition and uptake of nutrients by periwinkle leaves. It was observed that N, P, K, Na, Ca and Mg content in cultivated soil ranged from 2.0–3.5, 0.2–3.5, 0.52–1.60, 1.08–1.80 and 0.16–0.74% respectively. Increased level of RSC irrigation water, decreases P, K, Ca and Mg content in soil and N and Na content in leaf increases. The uptake values of N, P, K, Na, Ca, and Mg were reduced significantly with higher level of RSC irrigation waters. Yield (Fresh weight and dry weight of leaves) decreased with increasing RSC irrigation water. Increased the levels of RSC, decreased the EC and increased pH values of soil.