A two year study was conducted at University of Uyo Teaching and Research Farm,
Use Offot, Uyo, Akwa Ibom State in 2009 and 2010 cropping seasons to assess the effects of
complementary use of different organic manures on water yam growth and yield, economic
returns to management as well as attack by some pests. The experiment was laid out in a
randomized complete block design with three replicates. There were 8 fertilizer treatments
viz: poultry manure (PM), goat manure (GM), and oil palm bunch ash (OPBA) each at ...