EFFECT OF IRRIGATION, NITROGEN AND PHOSPHORUS ON GARLIC (ALLIUM-SATIVUM) AND THEIR RESIDUAL EFFECT ON GROUNDNUT (ARACHIS-HYPOGAEA)

A field experiment carried out during 1991-92 ro 1993-94 at Junagadh ( Gujarat) to study the effect of irrigation(1.0, 1.2 and 1.4 IW : CPE), nitrogen (25, 50 and 75 kg N/ha) and phosphorus (25, 50 and 75 kg P2O 5/ha) on garlic (Allium sativum L.), and their residual effect on succ eeding groundnut (Arachis hypogaea L.) showed that irrigation schedule d at 1.2 and 1.4 irrigtion water : cumulative pan evaporation (IW : CP E) significantly increased bulb yield, water-use efficeincy (WUE) and uptake of N and P by garlic over irrigation at 1.0 IW : CPE, while max imum net return was realised with irrigation at 1.4 IW : CPE. Applicat ion of 50 kg N/ha emerged out to be the optimum dose in terms of bulb yield, net return, WUE and uptake of N and P. Phosphorus fertilization failed to exert consistent influence on bulb yield, WUE and uptake of N and P by garlic. Irrigation, nitrogen and phosphorus applied to gar lic did not show residual effect on pod yield and uptake of N and P by groundnut grown in succeeding kharif seasons.