Field experiments were carried out in the farmer's field at Kokalai village, Namakkal during Rabi 2011-12 and 2012-13 to study the effect of drip irrigation regimes and fertigation levels on growth yield attributes of castor and onion crops, castor equivalent yield in castor with onion intercropping system. Results revealed that drip irrigation at 80 per cent CPE recorded significantly better growth characters of castor like plant height, leaf area index (LAI), yield attributes viz., length of primary spike; number of capsule per primary spikes; total number of spikes per plant; 100 seed weight and castor equivalent yield than 60 per cent and 40 per cent CPE during both the years. Among the different fertilizer levels, application of 100 per cent RDF as water soluble fertilizer (WSF) registered better growth characters viz., plant height, LAI, yield attributes and castor equivalent yield during both the years compared to other treatments. The onion growth characters viz., plant height, number of leaf sheaths, single bulb yield and number of bulb per plant-1 were significantly influenced by drip irrigation at 80 per cent and 100 per cent RDF as water soluble fertilizer during both 2011-12 and 2012-13.
Field experiments were conducted to study the influence of organic manures, micronutrients and arbuscular mycorrhiza (AM) on the productivity of maize-sunflower cropping system at Tamil Nadu Agricultural University, Coimbatore during 2011-12 and 2012-13. The experiment was laid out in Split Plot Design and replicated thrice for maize during winter 2011-12 and 2012-13 and the same experiment after dividing each plot into two was laid out in Split-split Plot Design with three replications for sunflower during summer 2012 and 2013 to estimate the residual effects of organic manures in maize, the results revealed that among the organic manures, poultry manure @ 5 t ha-1 with RDF recorded significantly enhanced quality parameter like crude protein and starch content in maize followed by application of sericulture waste @ 5 t ha-1 with RDF. Among the micronutrients and AM, ZnSO 4 @ 37.5 kg ha-1 recorded significantly crude protein and starch content followed by application of followed by TNAU MN mixture. In sunflower, better oil yield and oil quality were recorded with application poultry manure @ 5 t ha-1 with RDF to preceding maize followed by sericulture waste @ 5 t ha-1 with RDF to preceding maize. The same trend was also noticed in the second year crop.
SUMMARY : : A field experiment with differenttillage practices and land configurations in cottonmaize cropping systems was conducted at TNAU, Coimbatoreduring 2011-12 and 2012-13. Totally there were 8 treatments which were replicated thrice in a Randomized Block Design.The treatments consisted of three tillage practices viz., conventional tillage, reduced tillageand zero tillage and three types of land configurations viz., flat bed and furrow irrigated raised bed (FIRB) which were compared with the existing practice of ridges and furrows. The result of two cropping cycles revealed that the growth parameters and seed cotton yield of cotton were higher in the reduced tillage to both cotton and maize and planting on FIRB which was on par with conventional tillage to both cotton and maize and planting on ridges and furrows (existing practice as check), conventional tillage to both cotton and maize and planting on FIRB, reduced tillage to both cotton and maize and planting on FIRB and reduced tillage once to cotton alone and planting on FIRB. In maize, better growth, improved yield parameters and higher yield were recorded in the reduced tillage to both cotton and maize and planting on FIRB.The lowest yield of cotton and maize was recorded in the zero tillage to both the crops and planting on flat bed. In the cotton-maize system, cotton equivalent yield (CEY) was almost similar in reduced tillage to both cotton and maize and planting on FIRB (4784 kg/ha), existing practice of conventional tillage to both cotton and maize and planting in ridges and furrows (4755 kg/ha) and conventional tillage to cotton alone and planting both cotton and maize on the FIRB (4750 kg/ha).How to cite this article : Puvila, P., Siddeswaran, K. and Mariappan, G. (2017). Leaf area index and yield of cotton -maize cropping systems influence by tillage and land configuration. Agric. Update, 12 (TECHSEAR-4):
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