1. H. Aldrich 1979 .Organizations and environmentsPrentice-Hall, Englewood Cliffs, NJ
2. .1999 .An overview of sustainable agriculture in Kenya,28 :32
3. C.M. Coughenour 2003 .Innovating conservation agriculture: The case of no-till cropping .Rural Sociology,68 (2 ):278 –304 .
4. M. Crawley 2002 .Organic farming tries to take root in Kenya .Christian Science Monitor,February 7
5. C. Jowi 2000 .Conservation farming and business in Kenya .International Union of Food Science and Technology Newsletter,46 :3 –4 .