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Paper Details

Effect of planting geometry and nitrogen levels on growth, green cob yield and economics of sweet corn (Zea mays saccharata Sturt.)

AARTI VERMA* AND G.S.TOMAR1

Journal Title:International Journal of Agricultural Sciences
Abstract


A field experiment was conducted at the Instructional Farm of Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) during Kharif season of 2009. The sweet corn var. Sugar-75 was sown on July 7th 2009 using experimental techniques of Split Plot Design with three replications. Treatment comprised of three planting geometry viz., 60 25cm (P1), 60 x 20cm (P2), 60 x 15cm (P3) in main plots and 5 levels of nitrogen viz., control (N0), 40 (N1), 80 (N2), 120 (N3), 150 (N4), kg N ha-1 in sub plots. Results revealed that all the growth parameters were influenced significantly due to different planting geometries and levels of nitrogen. Wider plant spacing 60x25cm (P1) produced maximum number of green leaves, stem girth, dry matter accumulation and crop growth rate which resulted in maximum green cob yield (9.65 t ha-1) and higher net returns (Rs. 78,371 ha-1) coupled with wider B:C ratio (3.33) as compared to other planting geometries. However, narrow plant spacing (60 15 cm was found to be superior in terms of number of cobs ha-1 (91.63 103), green fodder and stover yields. Application of nitrogen @ 120 kg N ha-1 was found to improve growth and yield attributes of sweet corn and consequently the higher green cob yield (10.23 t ha-1). Wider plant geometry (60 25cm) in combination with 120 kg N ha-1 recorded maximum green cob yield (11.06 t ha-1).

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