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Magsino, A. D. M., Adan, A. J. R., Espineli, M. M. R. (n.d.). Soybean Production Under Conventional, Organic, and Zero Fertilization Schemes. College of Agriculture, Food, Environment, and Natural Resources Cavite State University. Retrieved from http://calabarzon.neda.gov.ph/wp-content/uploads/2016/10/Magsino-Soybean-Production-Under-Conventional-Organic-and-Zero-Fertilization-Schemes.pdf