Bhaskar, S.LINGARAJU, N. N.2020-10-032020-10-032018-11-20Th-12226https://krishikosh.egranth.ac.in/handle/1/5810152234A field experiment was conducted on the “Response of maize-cowpea sequence to treated sugar mill effluent irrigation under different nutrient and moisture regimes in Cauvery command area” in the premises of Research and Development Farm of M/s Sri Chamundeshwari Sugars Limited, K.M. Doddi, Maddur taluk, Mandya District during Kharif and Rabi/Summer 2016-17 and 2017-18. The experiment had twelve treatments with three replications. The results revealed that significantly higher grain (124.4 q ha-1) and stover (193.0 q ha-1) yield of maize was obtained with application of treated sugar mill effluent (TSME) with amendment (gypsum) + SSNM for targeted yield of 120 q ha- 1. Nutrient uptake and soil properties viz., available soil nutrients N, P2O5 and K2O after harvest of maize significantly differed with treatments receiving treated sugar mill effluent with amendment (gypsum) + SSNM for targeted yield of 120 q ha-1 (T12), Whereas lower uptake of N, P, K was noticed with fresh water + RDF. With respect to residual effect of the treatments on the succeeding cowpea, higher seed yield (955kg ha-1), nutrients uptake and soil available nutrients was recorded with TSME with amendment (gypsum) + SSNM for targeted yield of 120 q ha-1 as compared to all the other treatments in maize-cowpea sequence. The second experiment was laid out in split plot design with 12 treatments combinations and replicated thrice. The experiment consisted of six main plot treatments of IW/CPE and two sub plot treatments (mulching and without mulching). Kernel and stover yield of maize was recorded higher with the treatment receiving 0.9 IW/CPE ratio with treated sugar mill effluent with sugarcane trash mulching (79.8 and 162.7 q ha-1, respectively) compared to other treatment combinations. Treatment with 0.5 IW/CPE ratio with fresh water (59.6 and 100.1 q ha-1, respectively) across all the treatments resulted in lower kernel and stover yield. Similar trend was observed in growth and yield parameters, economics, nutrient uptake and soil properties.EnglishThesis