ABSTRACT This experiment was conducted from Mart 1991 to June 1991, at Kramat, Magelang Utara, Magelang, Central java. The soil type regusol with pH 6.6. Altitude 375 meters. This experimen has an effort to know the effect tris- kontanol and concentration optimum to yield of two variety Soybean (Glycine max (L) Merril). The method of experiment used wan Split plot…