A long-term soil fertility experiment under maize-wheat cropping pattern was conducted from 1994/95 to 1997/98 at the Agricultural Research Center, Surkhet in order to study the long-term effects of balanced and unbalanced fertilizers application for maize and wheat on crop yields and soil chemical properties. The highest yield was obtained from plots receiving recommended levels of N, P and K in both wheat and maize. Yields remained almost from the first to fourth year for organic manure treated plots.  While both inorganic and organic treated plot showed the consistent increase in maize yield from year one to four.  The lowest yields  of maize and· wheat  were  observed  in plots fertilized   according  to farmers'  practice   (3.7 t/ha FYM)  soil chemical  analysis  revealed  a decreasing  trend  in available phosphorus  and  organic  matter content and an increasing trend in total nitrogen and available potassium  over the study period Continuation of the experiment for  an additional four  to five years  is needed to strengthen the findings from  this long-term study.

A long-term soil fertility experiment under maize-wheat cropping pattern was conducted from 1994/95 to 1997/98 at the Agricultural Research Center, Surkhet in order to study the long-term effects of balanced and unbalanced fertilizers application for maize and wheat on crop yields and soil chemical properties. The highest yield was obtained from plots receiving recommended levels of N, P and K in both wheat and maize. Yields remained almost from the first to fourth year for organic manure treated plots.  While both inorganic and organic treated plot showed the consistent increase in maize yield from year one to four.  The lowest yields  of maize and· wheat  were  observed  in plots fertilized   according  to farmers'  practice   (3.7 t/ha FYM)  soil chemical  analysis  revealed  a decreasing  trend  in available phosphorus  and  organic  matter content and an increasing trend in total nitrogen and available potassium  over the study period Continuation of the experiment for  an additional four  to five years  is needed to strengthen the findings from  this long-term study.