Hasan M A,Kamal A M A.Effect of fertilizer on grain yield and grain protein content of wheat[J].Journal of the National Science Council of Sri Lanka,1998,26(1):1-8.
Singh P K,Rafey A.Response of wheat(triticum aestivum) to seeding date,nitrogen levels and seed rate[J].Journal of Research,1998,10(1):34-37.
[8]
Mishrs R K,Pandey N,Pandey V K,et al.Effect of nitrogen and irrigation scheduling on biomass accumulation and net primary productivity in wheat[J].Advances in Plant Sciences,1998,11(1):99-103.
