Two long-term experiments,  one in rice - wheat system and another one in maize/finger millet system were conducted at Pakhribas Agricultural Centre (PAC) (1450 masl) for  8 (1989 to 1996) and 6 years (1989 to 1994) respectively.   The objectives of both the experiments were to find  out the long-term response of organic and inorganic fertilizers  singly or in combination with crop yields and soil properties.  In case of wheat-rice system, the additional objectives were to know the residual effect on rice yields when organic and inorganic fertilizers were applied to the preceding wheat crop and also to estimate nutrients uptake by rice and wheat crops. Application of 60:30:30 kg N:P2 O5:K2O/ha plus  15 t compost/ha gave higher grain yields  (3.52 to 5.01  t/ha) in all years. Response of K was recorded when applied with N. The residual effect of compost on rice yield was noted but no residual effect from chemical fertilizer. However, chemical fertilizers increased exchangeable acidity upto 1.2 to 2.0 cmol/kg in both the system. Available phosphorus       in soil decreased as much as 12.2 mg/kg with chemical fertilizers and increased 26.4 to 30.8 mg/kg with compost plus N top-dressing.  Available K in soil significantly increased to 92.9 m/kg with the application of 25 t compost/ha in maize/finger millet system but such high response was not noted in wheat-rice system. Application  of  2  t  lime/ha  in  each  year   increased  pH   to  6.2  and exchangeable Ca to 11.1 cmol/kg. Cation exchange capacity, micronutrient (Fe, Mn, Cu and Zn)and physical properties (bulk density, moisture % at field capacity, wilting point and water holding capacity) were not affected by the treatments. Nitrogen, P and K uptake by rice and wheat crops were higher in the treatment of 15 t compost plus balanced fertilizer (60:30:30 kg N:P2 O5.K2O/ha) thereby producing more crop  yields.

Two long-term experiments,  one in rice - wheat system and another one in maize/finger millet system were conducted at Pakhribas Agricultural Centre (PAC) (1450 masl) for  8 (1989 to 1996) and 6 years (1989 to 1994) respectively.   The objectives of both the experiments were to find  out the long-term response of organic and inorganic fertilizers  singly or in combination with crop yields and soil properties.  In case of wheat-rice system, the additional objectives were to know the residual effect on rice yields when organic and inorganic fertilizers were applied to the preceding wheat crop and also to estimate nutrients uptake by rice and wheat crops. Application of 60:30:30 kg N:P2 O5:K2O/ha plus  15 t compost/ha gave higher grain yields  (3.52 to 5.01  t/ha) in all years. Response of K was recorded when applied with N. The residual effect of compost on rice yield was noted but no residual effect from chemical fertilizer. However, chemical fertilizers increased exchangeable acidity upto 1.2 to 2.0 cmol/kg in both the system. Available phosphorus       in soil decreased as much as 12.2 mg/kg with chemical fertilizers and increased 26.4 to 30.8 mg/kg with compost plus N top-dressing.  Available K in soil significantly increased to 92.9 m/kg with the application of 25 t compost/ha in maize/finger millet system but such high response was not noted in wheat-rice system. Application  of  2  t  lime/ha  in  each  year   increased  pH   to  6.2  and exchangeable Ca to 11.1 cmol/kg. Cation exchange capacity, micronutrient (Fe, Mn, Cu and Zn)and physical properties (bulk density, moisture % at field capacity, wilting point and water holding capacity) were not affected by the treatments. Nitrogen, P and K uptake by rice and wheat crops were higher in the treatment of 15 t compost plus balanced fertilizer (60:30:30 kg N:P2 O5.K2O/ha) thereby producing more crop  yields.