TY - BOOK AU - Ireri, Daniel Mwangi TI - Application of Central Composite Design in Modelling and Optimization of Yields Components of Sweet Potatoes (Ipomea Batatas (L) Using Organic Manure and Phosphate Fertilizer AV - THE SB 211 .M83 2019 PY - 2019/// CY - Chuka, Kenya PB - Chuka University KW - 1. Sweet potato farming ER -