EFFECT OF AZOTOBACTER SP AND UREA FERTILIZER (N) ON EFFICIENCY (N) UPTAKE AS WELL AS TOMATO CROP YIELD

One of the important commodities that are widely consumed to meet nutritional and food needs, especially vegetables, is tomato (Solanum lycopersium). The need for tomatoes increasing both in quantity quality. But until now vegetables quality difficult using conventional agriculture. For this reason, application biological fertilizers have potential reduce use inorganic able efficiently fertilize, namely Azotobackter sp. ability these microbes tether nitrogen from air largely depends on environmental conditions, availability organic matter within rhizosphere, aeration soil moisture . Nitrogen a very plant nutrient. adequacy supply plants characterized by speed growth dark green leaf color. In research Goeswono Soepardi (1983), stated tethering Azotobacter sp only about 25 kh ha-1 N year-1. Meanwhile, according Tisdale et al (1985) 82-120 kg be produce 30 tons fresh This situation shows needs nitrogen, fertilization still needed even though they received additional inoculated sp, is, fertilizing urea as source N. objectives study are: 1. Effect uptake well crop yield, 2. dose fertilizer inoculation gives highest yield Based results obtained , there was noticeable increase administration Asotobakter inoculant treatment accompanied than those were not given inoculants each treatment. found A1N3 with weight fruits 8,969.30 g / 90