The present investigation was performed in Horticultural Research Station, Mondouri, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal during 2017 to 2018 to assess the best dose of humic acid and vermicompost combination for African marigold. The experiment was designed in Randomised Block Design (RBD) with three replications. There were four concentrations of humic acid extracts (0.5 g/l, 1.0 g/l, 1.5 g/l and 2 g/l) applied as a foliar spray in combination with basal doses of vermicompost (1 kg/m2 and 2 kg/m2). All the parameters showed significant differences regarding vegetative, flowering as well as quality parameters. The results indicated that foliar spray with 1.5 g/l of humic acid extract along with 2 kg/m2 vermicompost significantly increased plant height (54.54 cm), number of primary branches (7.21), flower diameter (7.44 cm), fresh weight & dry weight of flower (9.06 g & 1.2 g respectively), number of flowers per plant (84.16), yield per hectare (47.01 tons/ha) as well as the quality parameters. So, among the nine treatments, T8 (Humic acid 1.5 g/l + 2 kg vermicompost/m2) was the best combination for improving plant growth, yield and quality of African marigold in the Indo-Gangetic plains of West Bengal.

An experiment was carried to evaluate the effect of combined application of seaweed and neem cake on growth and flowering of tuberose (Polianthes tuberosa)cv. Prajwal. The study was laid out under Randomized Block Design (RBD) with eleven treatments and three replications where different combinations of neem cake and seaweed were compared with control. The result of the experiment revealed that the application of neem cake and seaweed significantly affected the quantitative and qualitative characters of tuberose. Among all the treatments, treatment T11 (Seaweed 4g/m2 + Neem cake 0.4 kg/m2 ) was found most effective regarding the growth and flowering attributes in comparison to control. The treatment T11 (Seaweed 4g/m2 + Neem cake 0.4 kg/m2 ) also gave most promising result regarding vase life and spike yield.