TY - GEN AU - Sankaran,S. TI - Studies on the efficiency, selectivity and residual toxicity of herbicides in grain sorghum ( Sorghum vulgare pers. var. CSH-1 ) KW - Sorghum vulgare KW - Toxicity KW - Herbicides KW - Chemical methods KW - Physical methods KW - Weed control KW - Field experimentation ER -