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Experiments were conducted during kharif seasons of 194-1996 to evaluate the efficacy of different organic sources to substitute inorganic potassium in rice. Application of 25 percent K as rice husk ash and 75 per cent as muriate to potash produced higher mean rice grain yield of 5666 kg ha" which was 7.32 per cent higher over 100 per cent K through inorganic fertilizer alone. Hundred percent substitution of inorganic potassic fertilizer with organics did not prove to be advantageous. Higher net return per rupee was associated with 25 per cent K as rice husk ash and 75 per cent as MOP.

Field experiments were carried out to evaluate the production potential of cereal-legumne fodder combinations in the North Western Zone of Tamil Nadu having red sandy loam soils at RRS, Paiyur in 1987 and 1988. Cereal fodders like sorghum, maize, pearl millet and finger millet and legume fodders such as cowpea and soybean were raised as pure and in 1:1 and 2:1 ratios. The experimental results indicated that maize cowpea in 1:1 combination produced 27 tonnes of green fodder with higher per day productivity and protein yield under irrigated conditions.

Experiments were conducted during Kharif and rabi seasons of 1985-1986 at Tamil Nadu Agricultural University, Coimbatore to study the response of application of yield attributes such as number of panicles hill, filled grains panicle'' and thousand grain weight were positively influenced by level and time of K application. During Kharif, application of 50 kg.ha K, O applied basally at planting produced greater response while during rabi, 50 kg.ha¹ K,O applied in two equal splits at planting and panicle initiation resulted in high response. Application of at least part of K at planting as basal dose was superior to entire K applied as top dressing alone at later growth stages.