Tabaglio, Vincenzo, Carolina Gavazzi, and Paolo Paris. “On Seasonal Fluctuations of Available Olsen P in Soils”. Italian Journal of Agronomy 1, no. 1 (March 31, 2006): 73–83. Accessed May 3, 2024. https://www.agronomy.it/agro/article/view/ija.2006.73.