Wheat (Triticum aestivum L.) was raised in minilysimeters rabi 1999-2000 and 2000-2001 with main objectives to assess the effect of flyash incorporation (0, 5, 10 and 15 t ha-1) with (10 t ha-1) and without FYM on physico-chemical properties of the soil and wheat productivity on two texturally different (sandy loam and clay loam) Ustochrepts. The results of the experiment indicated that clay loam soil being higher in CEC, organic matter content, water holding capacity and available nutrients brought an improvement in growth, yield attributes, grain and straw yields and uptake of plant nutrients by wheat when compared with sandy loam soil.
Incorporation of FYM and flyash at 10 t ha-1, in general, improved CEC, organic carbon content, available nutrient status and decreased the soil pH. Incorporation FYM has increased while flyash has decreased the water holding capacity of the soil. On the other hand incorporation of flyash has enhanced build up of electrolytes in the soil. A definite build up of metallic cations particularly in surface soil layer, though, within permissible limit has occurred when flyash was incorporated beyond 5 t ha-1 calling for a constant monitoring. Incorporation of FYM and flyash at 10 t ha-1 also improved the growth and yield attributes, grain and straw yields of wheat and uptake of plant nutrients. Thus flyash could successfully be used in agriculture, however its use need constant monitoring of toxicant build-up in soil for its long term use.