Usman, K., Khalil, S. K., & Ghulam, S. (2012). Tillage and N Impact on Wheat Production and N Efficiency under Rice-Wheat Cropping System in Northwestern Pakistan. Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist).
Cita Chicago (17th ed.)Usman, Khalid, Shad Khan Khalil, i Said Ghulam. "Tillage and N Impact on Wheat Production and N Efficiency Under Rice-Wheat Cropping System in Northwestern Pakistan." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist) 2012.
Cita MLA (9th ed.)Usman, Khalid, et al. "Tillage and N Impact on Wheat Production and N Efficiency Under Rice-Wheat Cropping System in Northwestern Pakistan." Philippine Agricultural Scientist, The (Formerly the Philippine Agriculturist), 2012.