Nile water hyacinth processing part (і) chemical characteristics of humic acids extracted from naturally humified Nile water hyacinth and their natural humates effect on maize grain yield
By: Ibrahim, Majdah Husayn; Nawfal, Fatimah Abd al-Hamid. Assiut University Bulletin for Environmental Researches. Vol. 10, no. 2 (Dec. 2007), pp.47-56, 10 p.
Subjects: Acid deposition; Corn; Water pollution