ABSTRACT A reseach of the influince of seed weight to yield of some varieties of tomato (Lycopersicum esculentum. Mill), had been carried out since May 18th 2000 until September 1st, 2000. The place of research is in the green house of Agriculture Faculty, Tidar University of Magelang. The kind of soil is latosol with pH 6,3 and the altitude is 380 metres. The method of the resear…