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The research was conducted to study the effect of management options for combine harvested rice residue and its effect on succeeding rice crop growth responses. The experiment was laid out in field using a randomized block design with nine treatments and replicated three times. The computed biometric data were subjected to statistical scrutiny.  Incorporation of combine harvested rice residue with 25 kg additional N ha-1 as basal + bio-mineralizer (2 kg t-1 of rice residue) and cow dung slurry (5%) recorded higher plant height, number of tillers, dry matter production (DMP), leaf area index (LAI), crop growth rate (CGR) and relative growth rate (RGR) of the succeeding rice irrespective of the growth stages. It was closely followed by straw incorporation with 25 kg additional N ha-1 as basal + cow dung slurry (5%). Incorporation of straw alone and removal of straw negatively influenced the rice growth and growth indices. Hence, it is advisable to incorporation of rice residue with additives for better growth and growth indices of rice crop.

Field experiment was conducted at Agricultural Research Station, Kovilpatti during rabi season (October 2017 to January 2018) to find out the suitable plant geometry, levels of fertilizers and foliar spray of micronutrients (Zn and Fe) at 15, 30 and 45 DAS to improve the growth and yield of sorghum variety K12 (dual purpose). The experiment was laid out in randomized block design with three replication and twelve treatments. The treatment consists of two plant geometry, three different dose of fertilizer and foliar spray of micronutrients viz., 0.5% ZnSO4 + 0.2% FeSO4 at 15, 30 and 45 DAS. Observation on growth parameters, grain yield, stover yield, fodder qualities and Rainfall use efficiency were recorded. The experimental results shows that reduced plant spacing of 30 × 15 cm together with enhanced application of 50:25:25 kg NPK ha -1 + foliar spray of 0.5% ZnSO4 + 0.2% FeSO4 at 15, 30 and 45 DAS significantly increased the growth parameters viz., plant height, stem girth days to flowering and drymatter production. This attributes ultimately resulted in higher grain (3961 kg ha -1 ) and stover (13972 kg ha -1 ) yield of dual purpose sorghum compared to recommended practice of rainfed sorghum having 45 × 15 cm spacing and application of recommended 40:20:0 kg NPK ha -1 alone.