Discussion
Conclusion
References
[1] Serpil Savci, An Agricultural Pollutant: Chemical Fertilizer, International Journal of Environmental Science and Development, Vol. 3, No. 1, February 2012
[2] Adamchuk, Viacheslav I.; Hummel, J. W.; Morgan, M. T.; and Upadhyaya, S. K., "On-the-go soil sensors for precision agriculture"
(2004). Biological Systems Engineering: Papers and Publications. Paper 1.
[3] Hak-Jin Kim, Kenneth A. Sudduth and John W. Hummel, Soil macronutrient sensing for precision agriculture (2009) : J. Environ. Monit., 2009, 11, 1810–1824 | 1811.
[4] M.L. Vitosh, J.W. Johnson, D.B. Mengel, Tri-state Fertilizer Recommendations for Corn, Soybeans, Wheat and Alfalfa, Extension Bulletin E-2567 (New), July 1995.
[5] J. Denning, R. Eliason, R. J. Goos, B. Hoskins, M. V. Nathan, A. Wolf, Recommended Chemical Soil Test Procedures for the North Central Region Agricultural Experiment, North Central Regional Research Publication No. 221 (Revised).
[6] Havlin et al., 1999.
[7] Wollenhaupt et al., 1997