ABSTRACT The aim research is to study the effect of age and root pruning of tomato seedling on the yields. The research had been done at Sawangan, Magelang whith an altitude of 425 metres, the soil type is latosol from October 1986 until Februari 1987. The research was arranged in Randomized Complete Block Design (RCBD) with two factors and three replicati- ons. The first factor is age of se…