Effect of zinc and boron on yield and quality of onion (Allium cepa L.) in alifisols of Tamirabarni tract
A field experiment was conducted at Agriculture College and Research Institute, Killikulam, Tamil Nadu during Rabi season crop, 2017-18 to determine the effect of zinc and boron as well as soil test crop response (STCR) application of N, P and K for achieving higher yield and better quality. The results showed that yield parameters like bulb lets clump-1 (6.4), polar diameter (3.35 cm), equatorial diameter (2.98 cm), weight of bulb (85.2g) and bulb yield (16.85 t ha-1) and bulb qualities such as total soluble solids (15.7 oBrix), ascorbic acid content (13.95 mg 100g-1), protein (8.46%) and pyruvic acid content (4.82 μmol g-1) was better in application of STCR (106:97:54 kg of NPK ha-1) + ZnSO4 @ 25 kg ha-1 with 0.5% foliar spray. This treatment recorded the highest net income (254243 ha-1) and B: C ratio (4.07).
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