Open Access Research Paper Views (1234) Soil Fertility Status of Smallholder Farms in Northern Highlands, Tanzania Deodatus Stanley Kiriba, Kelvin Mtei, Florian Wichern, Patrick Alois Ndakidemi Int. J. Biosci. 18(3), 104-119, March 2021. DOI: http://dx.doi.org/10.12692/ijb/18.3.104-119 Keywords: Nutrient deficiency, Physico-chemical properties, Smallholder farmer, Soil acidity, Soil critical levels Details