Effect of Graded Levels of Nitrogen and VAM on Growth and Flowering in Calendula (Calendula Officinalis Linn.)

A field experiment was conducted to study the effect of graded of nitrogen levels and VAM inoculation on growth and yield of calendula (Calendula officinalis Linn.). Treatments comprised of four levels of nitrogen (0, 50, 75 and 100 kg/ha) and three levels of VAM (0, 3 and 5 g/plant) which were tested in factorial randomized block design with three replications. Results revealed that the higher level of nitrogen (100 kg/ha) or VAM (5 g/plant) caused significant influences in increasing most of the growth, flowering and yield parameters studied. Interaction of higher levels of nitrogen and VAM (100 kg N + 5 g VAM) significantly increased width of leaf, flower diameter and number of branches and flowers per plant.