Journal of FARM SCIENCES, Vol 33, No 4 (2020)

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Response of groundnut to micro-irrigation and methods of fertilizer application during rabi season

LAXMAN CHINCHALI, G B Shashidhar

Abstract


A field experiment was conducted at Main Agricultural Research Station, University of Agricultural Sciences,Dharwad during rabi, 2019. It comprised of three levels of irrigations at different growth stages and two different methodsof fertilizer application, fertigation with calcium nitrate, sulphur granules and basal application of fertilizer as per recommendedpackage of practice (RPP). The treatments were replicated thrice in strip plot design. Drip irrigation applied at 0.6 ET0(Seedling) + 1.0 ET0 (Flowering) + 1.25 ET0 (Pegging) + 0.8 ET0 (Pod formation) stages with three split application ofnitrogen and phosphorus at nodule formation (on 3rd, 4th and 5th week after sowing) stages and fertigation of three splits ofcalcium nitrate [Ca(NO3)2] and sulphur (granular form) at peg formation stage (on 7th, 8th and 9th week after sowing)recorded significantly higher number of pods per plant, pod weight per plant and dry pod yield (28.8, 25.0 g per plant and3771 kg ha-1) over surface (16.9, 14.9 g per plant and 1937 kg ha-1) and sprinkler (18.7, 16.4 g per plant 2272 kg ha-1) methodof irrigation. The same treatment recorded significantly higher net returns ( 1,04,109 ha-1) compared to surface ( 34,917 ha-1)and sprinkler ( 47,775 ha-1) method of irrigation and fetched an additional amount of 69,192 and 56,334 ha-1, respectively.Similar treatment recorded significantly higher water productivity (1.06 kg m-3) over surface and sprinkler irrigation(0.37 and 0.67 kg m-3, respectively) with a saving of irrigation water to the extent of 31.49 and 12.21 per cent over surfaceand sprinkler irrigation.

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