i SOCIO-CULTURAL AND INSTITUTIONAL DETERMINANTS IN THE UPTAKE OF HORTICULTURE FARMING IN ALDAI DIVISION, NANDI COUNTY, KENYA BY EDWIN KIPNG’ETICH SAWE A THESIS SUBMITTED IN FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN SOCIOLOGY DEPARTMENT OF SOCIOLOGY AND ANTHROPOLOGY MASENO UNIVERSITY © 2018