OPTIMIZATION OF SULPHUR, ZINC AND BORON ON THE PRODUCTIVITY OF RAINFED MAIZE (Zea mays L.)
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Date
2015-06-30
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UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR
Abstract
A field experiment was conducted during kharif season of 2014, at Agricultural College Farm, Raichur to study the “Optimization of sulphur, zinc and boron on the productivity of rainfed maize” in medium black soil. The results revealed that significantly higher available nitrogen (313.65 kg ha-1), phosphorous (31.90 kg ha-1), potassium (235.56 kg ha-1), sulphur (12.33 kg ha-1), DTPA extractable zinc (0.42 mg kg-1) and HWSB (0.30 mg kg-1) were observed by the application of 125-150% RDF along with 10-15 kg S, 5-7.5 kg Zn and 0.25-0.5 kg B ha-1. The taller plant height (249.78 cm), leaf area (3702.91 cm2), total dry matter production (233.82 g), cob length (28.00 cm), number of grain cob-1 (682.29), test weight (32.56 g), grain and stover yield (8.40 t ha-1 & 12.99 t ha-1, respectively); total uptake of nitrogen (325.43 kg ha-1), phosphorous (81.12 kg ha-1), potassium (273.76 kg ha-1), sulphur (48.19 kg ha-1), zinc (405.83 g ha-1) and boron (239.81 g ha-1) by maize crop were significantly higher by the application of 125% RDF along with 15 kg S, 7.5 kg Zn and 0.5 kg B ha-1. The higher recovery efficiency and agronomic efficiency of nitrogen (179.46 % and 35.01), phosphorous (97.37 % & 70.03), potassium (557.11 % & 140.05), sulphur (287.09 % & 299.00), zinc (4.37 & 598.00) and boron (46.87 % & 11960.00) were registered with application of 125% RDF along with 10-15 kg S, 5-7.5 kg Zn and 0.25-0.5 kg B ha-1. The higher net returns ( 79,989.00 ha-1) and B:C (2.59) were recorded with application of 125% RDF along with 10 kg S, 5 kg Zn and 0.25 kg B ha-1.
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