BASBAG, SEMA. “Effects of Humic Acid Application on Yield and Quality of Cotton (Gossypium Hirsutum L.)”. Asian Journal of Chemistry 20, no. 3 (March 30, 2010): 1961–1966. Accessed November 29, 2024. https://asianpubs.org/index.php/ajchem/article/view/19185.