Formerly International Journal of Basic and Applied Agricultural Research

Productivity, nutrient uptake and economics of sweet corn (Zea mays L. var. saccharata) under different planting geometry and NPK levels

Pantnagar Journal of Research, Volume - 22, Issue - 1 ( January-April 2024)

Published: 2024-04-30

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To study the response of sweet corn to varied fertilizer doses and planting geometry, a field experiment was conducted at G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand during kharif 2018.Four planting geometries (60 × 25 cm, 60 × 30 cm, 75 × 25 cm and 75 × 30 cm) were assigned to main plots, while three doses of NPK (120+60+40, 150+75+50 and 180+90+60 kg N+P2O5 +K2O/ha) were allocated to sub plots with in a splitplot design. The results revealed that the narrowest planting geometry, i.e., 60 × 25 cm, exhibited significantly higher husked cob yield (13325 kg/ha) and dehusked cob yield (10327 kg/ha) compared to the widest geometry of 75 × 30 cm, although it remained comparable with the other geometries. Planting geometry did not significantly affect the uptake of N, P and K. Notably, the 60 × 25 cm geometry resulted in significantly higher gross returns (Rs. 199875/ha), which were on par with the 60 × 30 cm geometry. Similarly, the net returns (Rs. 150176/ha) and BC ratio (3.02) were maximum under the 60 × 25 cm geometry, although differences were not significant. Regarding nutrient levels, the application of 180+90+60 kg N+P2O5 +K2O/ha resulted increase in husked cob yield (12687 kg/ha) and dehusked cob yield (10351 kg/ha), but the differences were not significant. However, crops fertilized with 180+90+60 kg N+P2O5 +K2O/ha exhibited significantly higher nutrient uptake. Gross returns, net returns and BC ratio did not significantly differ among different nutrient levels

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