Integrated Nitrogen Management Options on Growth and Yield of Rabi Castor, Ricinus communis L.

A field experiment was conducted during 2011-12 on loamy sand soil at Sardarkrushinagar to evaluate the effect of integrated nitrogen management on growth and yield of Rabi castor. maximum growth interms of plant height and number of branches per plant was observed with application of 75 per cent nitrogen through inorganic + 25% N through castor cake + Azospirillum . it also resulted in longer length of main spike , length of primary spike, more number of secondary and tertiary and total spikes per plant and more number of capsules on main spike. Integrated use of inorganic fertilizer with organic manure and seed treated with Azospirillum recorded highest seed yield. Oil content and oil yield was also higher with application of 75% N through inorganic + 25% N through castor cake + Azospirillum .