Response of safflower (Carthamus tinctorius) to in-situ green manuring and nitrogen: phosphorus levels under rainfed condition
DOI:
https://doi.org/10.59797/ija.v62i1.4262Keywords:
Cowpea, Fertility level, In-situ green manures, Safflower, Seed yield, Sunnhemp,Abstract
A field experiment was conducted during the rainy (kharif) and winter (rabi) seasons of 201112 and 201213 at Agricultural Research Station, Annigeri (Northern Dry Zone of Karnataka-Zone-3), Dharwad, Karnataka, re- sponse of safflower (Carthamus tinctorius L.) to in-situ green manuring and NP levels under rainfed condition. The experiment consisted of 4 green-manure crops, viz. sunhemp (Crotalaria juncea L.), greengram [Vigna radiata (L.) R. Wilczek], cowpea [Vigna unjuiculata (L.) Walp] and fallow, grown during the rainy season 4 fertility levels to succeeding safflower (0 : 0, 20 : 20, 30 : 30 and 40 : 40 N : P O kg/ha) during the winter (rabi) season. The ex- 2 5 periment was laid out in split-plot design with 3 replications. Among the green manures, incorporation cowpea and sunnhemp resulted in significantly higher safflower seed yield (1.25 and 1.15 t/ha), net returns( 22,319 and 19,551) and benefit: cost ratio (3.17 and 2.89), respectively, than greengram and fallow treatments. Among the fertility levels, higher fertility level (40 : 40 N : P O kg/ha) recorded significantly higher seed yield (1.32 t/ha), net 2 5 returns ( 23,833/ha) and benefit: cost ratio (3.25) than lower fertility levels. Among the interaction, significantly higher seed yield (1.57 and 1.42 t/ha), net returns ( 30,227 and 26,263/ha) and benefit: cost ratio (3.85 and 3.45), respectively, were recorded in cowpea and sunnhemp plots coupled with higher fertility level (40 : 40 N : P O kg/ha) than fallow-safflower system with higher fertility level. 2 5References
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