Molla SR, Huq SM. COMPARISON OF EXTRACTANTS FOR ASSESSING Fe, Mn, Cu AND Zn AVAILABILITY IN SOILS. Khulna Univ. Stud. [Internet]. 2022 Nov. 8 [cited 2025 Oct. 30];:823-5. Available from: http://kus.ku.ac.bd/kustudies/article/view/646