ABSTRACT The study investigated the influence of agricultural practice and the state of environment in kerio division Rift Valley-Kenya 2007-2011. The study was guided by specific objectives that included; identifYing the different agricultural methods employed in kerio division, to find out the effects of agricultural methods used on the environment and to suggest possible solutions of preserving the environment most through improving the farming methods. The study a sample survey and cross sectional study designs based on quantitative and qualitative data design. Secondary data were also sought through documentary analysis. Qualitative data were gathered through questionnaires. A sample population of eight (80) represented a target population of 800,000 people in the areas. These respondents were selected from villages that included; Nasokol Ndalu Tartar Kapchonge .the study's demographic nature considered the sex, martial status, levels of education, work experience, and the age groups of the respondents. The major agricultural practices used are; pastoralism, mixed farming, fallowing and shifting cultivation. The major positive effects include; formation of food, lead to rainfall formation, soil formation, refreshing air, formation of medicine, preservation of soil and conservation of natural resources. The following are the major negative effects; drought and famine, water scarcity, soil erosion and soil exhaustion. The major solutions include; sensitizing the people, use of manure, formation demonstration firms and provision of subsided farm implements.