Field investigations were conducted during 2015 and 2016 kharif seasons at the experimental farm of ICAR, Nagaland Centre, Medziphema to study weed growth and nutrient uptake in organically managed rice and maize as affected by N management and live mulching with cowpea. The experiment was laid out in factorial RBD with two kharif crops viz., rice (C1) and maize (C2), two organic N management viz., vermicompost @ 2 t/ha (N1) and vermicompost @ 2.7 t/ha (N2) and two mulches viz., control (No mulching) (L1) and live mulching with cowpea (L2). The dominant weed species observed were Cynodon dactylon, Digitaria setigera, Ageratum conyzoides, Amaranthus viridis, Cyperus iria and Cyperus rotundus. Weed density, dry weight and NPK uptake was found to be significantly lower in maize compared to rice during both years. Weed growth and NPK uptake was also found to be significantly higher with application of vermicompost @ 2.7 t/ha (N2) compared to 2 t/ha (N1) whereas, significantly lower weed growth as well as NPK uptake was also recorded with cowpea live mulch (L2) as compared to no mulching (L1). Cowpea live mulch (L2) with application of vermicompost @ 2 t/ha (N1) was found to record significantly lower NPK uptake by weeds in both crops. Yield and yield attributes of rice and maize were observed to be higher under cowpea live mulch with application of vermicompost @ 2.7 t/ha (N2).
A field experiment was conducted in ICR farm of Assam Agricultural University, Jorhat to evaluate the effect panchagavya on growth, yield and economics late sown rapeseed in Assam condition during rabi season, 2020-21. The experiment was laid out in Randomised Block Design with three replications and eight treatments like T1: control, T2: RDN through vermicompost (VC), T3: Vedic panchagavya soil application (3%), T4: 1 tonne VC/ha as basal + vedic panchagavya foliar application (3%), T5: enriched panchagavya soil application(3%), T6: enriched panchagavya foliar application(3%), T7: vedic panchagavya basal application (1.5%) + vedic panchagavya foliar application (1.5%), T8: enriched panchagavya basal application(1.5%) + enriched panchagavya foliar application(1.5%). Results showed that T4 was found to be best among all the treatments regarding growth, yield characteristics, and yield of the late sown rapeseed. The highest values of the growth metrics as well as yield metrics were recorded under treatment T4. This treatment produced the highest seed yield (6.89 q/ha) and stover yield (20.48 q/ha). Likewise, the highest oil yield (258.91 kg/ha) of rapeseed and highest gross return (Rs. 55120/ha) was observed in T4 treatment. But, the maximum net return (Rs. 34020/ha) and B:C ratio (1.90) were recorded under treatment T5.
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