[1]
Lumbantobing, R. , Hidayat, B. and Lubis, A. 2020. The Effect of Cow Manure and Cow Dung Biochar Application on P Available and Growth of Corn Plants in Ultisol. Jurnal Online PERTANIAN TROPIK. 7, 3 (Dec. 2020), 335-344. DOI:https://doi.org/10.32734/jpt.v7i3.6328.