ABSTRACT The research is aimed to study effect of the time and percentage of the defoliation of the leaves on the result of peanut (rachis hypogaea L). The research has been done on February 24th, 1996 until June 1°', 1996 at the Village Badran, Kranggan, Sub District in Temanggung Regency, with altitude of 483 meters. This research use Factorial Experiment in Split Plot…