Franke, Lucia Brandão, and João Carlos de Saibro. “Effect of Phosphorus and of Irrigation on Alfalfa Seed Yield”. Pesquisa Agropecuaria Brasileira 32, no. 12 (December 1, 1997): 1263–1272. Accessed March 26, 2026. https://apct.sede.embrapa.br/pab/article/view/4782.