A field investigation was carried out at Palampur with sixteen treatment combinations consisting offour levels of N (0, 50,100 and150 per cent of recommended dose), two levels of Zn (0 and 10 kg ha-1) and twolevels of B (0 and 1 kg ha-1) in factorial randomized block design. Application of N, Zn and B significantlyincreased their respective available contents in soil after wheat harvest. Nitrogen application also had positiveeffect on available P K and Zn. There was a consistent increase in available N content after wheat harvest withincreasing levels of N. In case of P, the differences between N levels were narrow enough and 50 per centrecommended N over control, 100 per cent N over 50 per cent N and 150 per cent over 100 per cent N could notsignificantly influence available P content of soil. The available K and Zn contents of the soil were significantlyincreased upto 100 per cent recommended dose of nitrogen. Highest grain (45.83 q ha-1) yield of wheat wasrecorded under 150 per cent of recommended dose of nitrogen which was 84.8 per cent higher than control.Application of 10 kg Zn ha-1increased the grain yield by 9.7 per cent. Similarly, boron application @ 1 kg ha-1increased grain yield by 8.1 per cent. 
