- Choudhry ,G.A., Sidiq, M., Habib, G. and Khan. M.A.(1989).Response of two wheat cultivars to nitrogen and phosphorus applications under rainfed conditions. J. Agric. Res, 27 (1) :13-17.
- Gordon,W.B. (2009).Starter fertilizer application method and conservation in reduced tillage corn production. Better Crops 93 (2):10-12.
- Ishan ,M.,Mahmood,A., Mian, A. and Cheema, N.M.(2007).Effect of different methods of fertilizer application to wheat after germination under rainfed condition. J. Agric. Res., 45 (4): 277-281.
- Kakar ,K.M,.Arif,M. and Nawab,K.(2002).Comparative assessment of phosphorus form for wheat applied at different stages. Pakistan J. Soil Sci.. 21 (4) : 14-20.
- Miller,P.L. and Wolf,D.C. (1987) Nitrogen inputs outputs. A valley Basin study. In:Nitrogen in the Environment.Vol.1.(Donold,R.N and J.G. MacDonald(eds) Academic Press New York : 163-172.