An investigation was conducted to study the effect of graded levels of nitrogen and Azospiriilum on growth and yield of Ashgourd (Benincasa hispida cogn.) cv.CO-1" was taken up in a new area, vegetable unit, Annamalai University, Annamalainagar during 2014- 2016. The mineral nutrient nitrogen was applied at 5 levels viz., 30, 45, 60, 75 and 90 kg ha"1 and Azospiriilum was applied in two levels [with Azospiriilum (At and without Azospiriilum (Ao)] and totally there were ten treatment combinations in three replications and the experiment was laid out in Randomized block design (RBD). The results of this experiment revealed that the plots that received combined application of nitrogen 75 kg ha-1 along with of Azospirillum -@ 2 kg ha-1 of soil evinced better performance on the growth attributes like, vine length, number of primary Branches, number of leaves per vine, leaf area, leaf area index, days to first female flowering, number of female flowers per vine, sex ratio, number of fruits per vine, fruit length, fruit girth, fruit weight, fruit yield
