Kelayakan Usahatani Ubi Jalar Dengan Penerapan Teknologi Pengguludan Di Lahan Kering Masam Di Lampung

An experiment was carried out at Natar Experiment Station, South Lampung, from March to June 2010. The objective of the research was to identify technical and economic feasibilities of sweet potato farming system on a dry acid soil using improved ridging technology. The technologies tested were: (1) use of large ridges (60 cm high) with a 125 cm x 20 cm plant spacing without breaking down the ridges, and (2) use of small ridges (30 cm high) with a 100 cm x 25 cm plant spacing and followed by breaking down the ridges, and the common farm practice as control. Sweet potato varieties Sawentar and local Kuning Banyuwangi were used in this experiment. The fertilizers applied in the improved technologies were at rate of 300 kg urea + 200 kg SP36 + 100 kg KCl + 500 kg dolomite + 4 t manure per ha. Results of the experiment showed that yields of sweet potato varieties grown on large ridges were higher than those grown on the small ridge. Variety Sawentar that was grown on large ridges yielded 18.68 t/ha and on small ridges 14.43 t/ha fresh tubers, with benefits of Rp 16,090,000 (B/C ratio 2.22) dan Rp10,987,500 (B/C ratio 1.56) respectively. The local variety Kuning Banyuwangi produced lower yield than that of Sawentar on both of the improved technology with B/C ratios less than 1.0. Variety Sawentar that was grown on the small ridge gave MBCR up to 3.09, hence this technology could be recommended to be applied in the dry land acid soil

Prospek Kacang Hijau pada Musim Kemarau di Jawa Tengah

Mungbean (Vigna radiata) are resistant to drought and the price relatively high and stable compared than other legumes. In Demak district, mungbeans grown in the dry season after rice in heavy soil (Vertisol), without tillage, wihtout weeding and irrigation. The main problem on mungbean cultivation are drought and pest attacks.The intensity of pest attacks can be suppressed by pesticides. While drought can be avoided by planting 3–5 days after the rice harvested. Planting intimely way, the use of early maturity varieties and uniform maturity of pod (Vima 1) accompanied by an intensive pest control in the Tempuran and Megonten village Demak district can provide high yields, ranging from 1.72 to 1.92 t/ ha. The cost of production is needed between Rp 2.926.000 – Rp3.167.000/ha, can provide benefits ranging between Rp 7.669.000 million – Rp 8.594.000/ha and B/C ratio from 2.42 to 2.90. The application of introduction technology using Vima 1 variety that farmers do a positive impact on benefits which reached Rp 12.210.814,- (B/C ratio3,22), so its worth in the region has developed just as in the areas of agroecology Demak. The use of variety Vima 1 for 2 years after the technology display has covering 2000 ha in the Demak district, in order to accelerate the adoption of the technology it need to be disseminated effectively assembled this technology through the display of this technology insome areas that has the same condition. Local Government and relevant agencies should be involvedso that effective dissemination of technology