Document Type : Research Paper
Authors
1 Assistant Professor, Soil and Water Research Institute of Ira
2 Scientific Member, Agricultural and Natural Resources Research Center of Semnan
3 Assistant Professor, Soil and Water Research Institute of Iran
Abstract
Keywords
Soltanpour, P. N., M. J. Malakouti, and A. Ronaghi. (1995). Comparison of diagnosis and recommendation in integrated system and nutrient sufficiency range for corn. Soil Sci. Soc. Am. J. 59: 10. 133-139.-Tisdale, S.L , W.L.Nelson., and J . D Beaton. (1993). Soil fertility and fertilizer. Macmillan USA. 648 page.