اأ.د. رفيق علي Uصالح. املدير العام املùساعد للمركز العربي ...
Guertin, M. and D. L. Smith Nitrogen Fertilizer Rate and Timing Effect on Bread Wheat Protein in Eastern Canada. Journal of Agronomy and Crop Science, 174 (5): Hayam, S. M., and A. K. Mostafa Evaluation of the response of new Egyptian wheat cultivars to biofertilizers and nitrogen level in new land.