Planting Geometry and Soil Moisture Conservation Practices in Late Kharif Sunflower (Helianthus annuus L.)
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Date
2018-08
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University of Agricultural Sciences, Dharwad
Abstract
A field experiment was conducted to study the planting geometry and soil moisture
conservation practices in late kharif sunflower (Helianthus annuus L.) at the Main
Agricultural Research Station (MARS), University of Agricultural Sciences, Dharwad during
2017 in black clayey soil. The experiment consisted seven treatments with five different
planting geometries (60 cm × 30 cm, 60 cm × 20, 45 cm × 15 cm, 45 cm × 20 cm and 120 cm
× 10 cm) and three land configurations (flatbed, skip row after every two rows of planting and
skip row after every two rows of planting with opening furrow in skipped rows). The
experiment was laid out in completely randomized block design with three replications.
Significantly higher number of green leaves per plant of 22.7 at 60 DAS (days after
sowing), leaf area index (1.21, 3.75 and 1.86 at 30, 60 DAS and at harvest respectively), leaf
area duration (73.40 and 83.07 days at 30-60 DAS and 60 DAS-harvest respectively) and crop
growth rate (0.154 g dm-2 day-1 at 30-60 DAS), seed yield (2,240 kg ha-1), stalk yield (3,589
kg ha-1) and oil yield (868 kg ha-1) were recorded with skip row after every two rows of
planting (45 cm × 15 cm spacing) + opening furrow at 30 DAS: 98,765 plants ha-1. Soil
moisture content and soil dehydrogenase activity (DHA) were not differed significantly due to
planting geometry and soil moisture conservation practices.
Skip row after every two rows of planting (45 cm × 15 cm spacing) + opening furrow
at 30 DAS: 98,765 plants ha-1 recorded significantly higher seed yield (2,240 kg ha-1) and
gross returns ( 78,400 ha-1). However, skip row after every two rows of planting (45 cm × 15
cm spacing): 98,765 plants ha-1 recorded significantly higher net returns ( 49,157 ha-1) and
B: C ratio (2.71).