Uji Kelayakan Teknis Dan Finansial Penggunaan Pupuk NPK Anorganik Pada Tanaman Kentang Dataran Tinggi Di Jawa Barat

. The research of NPK fertilizers USAge was carried out on dry season of 2001 in Alamendah village, Rancabali, Bandung. The experimental location was 1,400 meters above sea level and of andosol soils. The objective of the study was to investigate the composition of several NPK anorganic fer- tilizers and the effects on growth, yield, and profit for potato farming as the basis for technical recommendations re- garding the USAge. The experimental was randomized block design with eight treatments and four replications. The soil analysis results showed that the plots were low in nitrogen availability while P2O5 and K2O levels were quite high. The investigation revealed that the stated compositions of nitrogen, phosphorus, and potassium on the respective la- bels were not in accordance with the results of laboratory analysis. Among ten fertilizers tested, the number actually containing the stated levels of nitrogen, phosphorus, and potassium were 30, 20, and 40% respectively. Plant height and number of shoots/plant were not significantly different from the control for any of the alternative fertilizers NPK anorganic used. The use of fertilizer NPK 20-9-9 showed an average yield increase of 13.34% over typical farmer pro- duction methods. The increase in yield was one of the main factors resulting in a marginal return of 174% for fertilizer NPK 20-9-9 as well. Form these results it appears the fertilizer NPK 20-9-9 may be recommended for potato farming in West Java