Kaho, Uly J Riwu, Joritha Naisanu, and Karolina Satria Ida. 2020. “Effect of Cow Manure and Atonic on Spinach (Amaranthus spp.) Production in Dry Land”. Jurnal Biologi Tropis 20 (3):363-68. https://doi.org/10.29303/jbt.v20i3.2057.