EFFECT OF WEED MANAGEMENT AND Rhizobium INOCULATION ON GROWTH AND YIELD OF GROUNDNUT (Arachis hypogaea L.)
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Date
2004
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AAU, Anand
Abstract
A field investigation was carried out during kharif season of 2001 — 02 on sandy loam soil of College Agronomy Farm, B. A. College of Agriculture, Anand Agricultural University, Anand campus, Anand to study the effect of weed management practices and Rhizobium inoculation on growth and yield of groundnut (Arachis hypogaea L.) Ten weed management treatments comprising four pre-emergence herbicides viz., fluchloralin, pendimethalin, butachlor and metolachlor each @ 1.0 kg ha-1 and three hand weedings (at 15, 30 and 45 DAS) and weedy check combined with and without Rhizobium inoculation under factorial randomized complete block design with four replications. Seed treatment with Rhizobium was given in the morning on the day of sowing. Herbicides application was made the next day of sowing with the help of knapsack sprayer fitted with flat fan nozzle using 500 liter water per hectare. The net plot size was 12.0 m2. Minimum dry matter accumulation of weeds (70.00 kg ha-1) with higher weed control efficiency (90.70 %) was recorded under integrated method (i.e. pendimethalin @ 1.0 kg ha-1 + hand weeding at 30 DAS), which resulted in maximum pod yield (1773.50 kg ha-1). This treatment was comparable with fluchloralin applied @ 1.0 kg ha-1 coupled with hand weeding at 30 DAS. Weedy condition for the entire crop season reduced the pod yield by 29.90 - 35.95 % as compared to integrated method. Significant higher pod yield was obtained with Rhizobium inoculation than no inoculation. Yield attributes viz. number of pods plant-1, 100-pod weight and shelling per cent were influenced by integrated treatments (pendimethalin and fluchloralin @ 1.0 kg ha-1 plus hand weeding at 30 DAS). Maximum net realization (Rs. 29,047.83 ha-1) accured with cost : benefit ratio (4.13) was accured with treatment H6 (pendimethalin @ 1.0 kg ha-1 + hand weeding at 30 DAS) followed by fluchloralin alone and fluchloralin with hand weeding. In most of all the examined agronomical parameters, Rhizobium inoculation and weed control treatments have independent in their effect.
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AGRONOMY, AGRICULTURE, A STUDY