Sahasranaman, K.N.Radha, K.Pandalai, K.M.2014-06-112014-06-112007-02-08Indian Cocon.J.1964.18:3-11http://hdl.handle.net/123456789/2754The effect of (1) manuring with standard dose of NPK fertilizers at the rate of 0.55 lb. N, 0.56 1b. P2O5 and 1.0 Ib. K2O plus intercultivation, (2) heavy dose of NPK fertilizers 1.5 and 3.0 Ib. of N and P2OB, and 3.0, 4.5 and 6.0 lb. of K2O plus intercultivation and (3) no manuring and no cultivation, on the yield and foliar disease symptoms of four groups of palms affected by root (wilt) disease as well as leaf rot have been recorded. Manuring with standard dose of fertilizers plus intercultivation was found to be beneficial in maintaining an economic yield and the general health of the palms, although it has not been able to check the progress of the disease to any appreciable extent in the case of trees in an advanced stage of either of the diseases. A higher dose than the standard dose of manures is not advocated as it seemed, under the conditions of the experiment, to aggravate disease conditions and reduce yield. This probably arises due to the antagonists action of increased potassium on the magnesium.enArticle