Pengaruh Berbagai Ukuran Bobot Ubi Benih Kentang G4 (Solanum Tuberosum L.) Varietas Granola Dan Kompos Batang Pisang Terhadap Pertumbuhan, Hasil Dan Kualitas Kentang[The Effect of Various Sizes Weight of Potato Seed Tuber G4 (Solanum tuberosum L.) Varieties of Granola and Banana Stems Compost on Growth, Yield and Quality of Potato]

Production of varieties granolapotatostill cannotmeet theneeds of society. Even the production tends to decrease from year to year due to the used of tuber that is less right and farmer dependence to synthetic fertilizers resulting in circles of ravage. The purpose of this research was to determine the effect of seed tubers and banana stems compost on growth, yield and quality of G4 potato granola varieties. This research was conducted in the village of Los Cimaung, Rt.04 RW.18, Margamukti Village, District Pangalengan, Bandung regency from June to August 2015. The method that used was experimental method randomized block design (RBD) factorial pattern with three replications and consisting of two factor. The first factors was the size of the tuber seed potatoes (25 - 30 g/tuber, 45 - 50 g/tuber and 65 - 70 g/tuber). The second factor was the compost dose of banana stem (control, 10 tons/ha, 15 tons/ha, 20 tons/ha, 30 t/ha). The results showed the interaction between the seed tubers and compost banana stems to the addition of fresh weight at 90 days after planting. Seed tuber size has provided an independent effect into plant height, number of stolon productive, harvest index and quality (grading). The banana stems compost treatment has significant effect on number of stolon productive and harvest index. The seed tubers b1 (25-30 g/tuber) and b2(45 - 50 g/tuber)provide the highest result on the L (101-200 g/tuber) quality, the using of b3(65 - 70 g/tuber)seed tubers has the highest number on S (