Abstract Increasing prices of fertilizer have made farmers turn to other sources of plant nutrients for crop cultivation. Farmers are now increasing the use of animal manure to improve soil fertility. It is not clear what ef ects these manures might have on the yield performance of sweet potato (Ipomoea batatas). This study was conducted during the late raining season of the year 2016 at Kogi State University Research/Student Demonstration Farm, in the Southern Guinea savannah agro-ecological...
