Working Document Series Open Access Effects of NP Fertilisers and Manure Application on Maize-bean Yields, and Soil Nitrogen Mineralisation in Machakos County, Eastern Kenya C. Kibunja · B.E. Mochoge · N. Ogucha The inherent poor fertility of soils in Kenya constitute a major constrain to sustainable smallholders agriculture and more especially in arid and semi-arid parts of the country. The solution herein lies in the efficient use of nutrients a… RUF-31846 2012 CC BY 4.0 8 May 2014