Effect of organic manures along with humic acid on growth and leaf yield of thudhuvalai (solanum trilobatum l.) in the coastal ecosystem of cauvery delta region

“An investigation was carried out to study the “Effect of organic manures along with Humic acid on growth and yield of Thuduvalai was carried out with four different organic manures such as Farm yard manure @15, 17.5 and 20 t ha-1, vermicompost @ 2.5, 2.75 and 3 t ha-1, Coir pith compost @ 2.5, 2.75 and 3 t ha-1 t ha-1, Poultry manure @ 2.5, 2.75 and 3 t ha-1 along with Humic acid @ 0.1, 0.2, 0.3 per cent as foliar spray were studied under in randomized block design with three replication of 13 treatments. The growth parameters viz., plant height, number of branches, number of leaves, leaf area, leaf yield parameters, dry matter production and chlorophyll content were registered to be the highest when the Vermicompost (3 t ha-1) + Humic acid @ 0.3 per cent were sprayed. Among the treatments, application of Vermicompost (3 t ha-1) along in addition with Humic acid @ 0.3 per cent were found to be the best in increasing the plant growth and leaf yield attributes.