Bambara groundnut is considered tolerant to drought and unfertile soil; therefore, has higher potential to be cultivated. The average yield of dry pod weight from agricultural fields in Indonesia is still low (< 4

Efforts to increase soybean productivity must be synergy with the improvement of soil fertility through fertilizer, especially organic fertilizer. Population density of a crop determines to a greater extent its performance in terms of soybean yield. Based on the two cultivation techniques mention above, that is expected to increase soybean productivity. The objective of this research was to obtain organic fertilizer and plant spacing that can support the development of early-medium maturity soybean (Lokal Jateng soybean lines/Sinabung-1036) to achieve 3 ton dry seed per hectare. The research was conducted at Alfisol soil Muneng Station Research, Probolinggo and at Entisol soil Genteng Station Research, Banyuwangi on dry season (DS) 2012. The experiment used split plot design with three replications. As the main plot was plant spacing, namely: 1) 40 cm x 10 cm, 2 plants/hole, 2) 40 cm x 15 cm, 2 plants/hole, 3) 40 cm x 20 cm, 1 plant/hole, and 4) 40 cm x 20 cm, 2 plants/hole. As the sub plot were four doses and types of organic fertilizer, namely: 1) without organic fertilizer, 2) 2.5 t manure/ha, 3) 5 t manure/ha, and 4) 2 t Santap NM-2/ha. The result showed that the potential yield of 3 t/ha for large, early-medium maturity soybean could not be achieved at Alfisol soil Probolinggo and at Entisol soil Banyuwangi by planting soybean of Lokal Jateng soybean lines/Sinabung-1036 with plant spacing 40 cm x 10-20 cm, 1-2 plants/hole and application of 2.5-5 t manure/ha or 2 t Santap NM-2/ha.

Application of organic fertilizer can maintain and improve physical, chemical, and biological soil fertility and plant productivity. However, the use of manure requires a long time and a relatively large amount to have a positive impact on the soil and plants. In this regard, a study was carried out to evaluate the effect of the application of organic fertilizer and NPK inorganic fertilizer on soybean in lowland Vertisol. The study was conducted in lowland Vertisols in Ngawi and Madiun. The experiment used a randomized block design with three replications, with combination treatments of cow and chicken manure, Santap NM1 and NM2 fertilizer, and Phonska. The soybean seed used in this research was Local Central Java/Sinabung-1036 soybean line. The results showed that in lowland Vertisol of Ngawi which is rich in P element, application of 5,000 kg of cow manure/ha, 3,000 kg of chicken manure/ha, 1,500-2,500 kg/ha Santap NM1 and NM2 fertilizers, and 300 kg of Phonska/ha is not required. The yield of Local Central Java/Sinabung-1036 soybean line reached 1.95 t/ha. The lowland Vertisol of Madiun which has poor P element requires the addition of 5,000 kg of cow manure/ha, 1,500-2,500 kg/ha of Santap NM2 fertilizer, and 150 kg of Phonska/ha to increase soybean yield by 21-27% (0.42-0.55 t/ha). The quality and productivity of soil and crop cultivation in sustainable agriculture can be maintained by alternative recommendations for the use of organic and inorganic fertilizer inputs.

<p>Kacang hijau dipandang sebagai komoditas alternatif untuk dikembangkan di tanah masam. Identifikasi untuk mendapatkan teknologi budidaya yang sesuai, perlu dilakukan guna meningkatkan produktivitas. Penelitian ini bertujuan untuk mendapatkan kombinasi varietas dan pupuk yang efektif, guna meningkatkan produktivitas kacang hijau di tanah masam. Penelitian dilaksanakan di rumah kasa Balai Penelitian Tanaman Aneka Kacang dan Umbi (Balitkabi), Malang, Jawa Timur mulai bulan November 2014-Januari 2015. Penelitian ini menggunakan Rancangan Split Plot dengan tiga ulangan. Petak utama adalah empat macam varietas kacang hijau, yaitu: Kenari (V1), Murai (V2), Kutilang (V3), dan Vima 1 (V4). Anak petak adalah lima macam pemupukan, yaitu: tanpa pemupukan (P0), Phonska 300 kg/ha (P1), pupuk kandang sapi 1.500 kg/ha (P2), pupuk kandang sapi 3.000 kg/ha (P3), dan pupuk kandang sapi 5.000 kg/ha (P4). Dengan demikian, terdapat 20 perlakuan dengan tiga ulangan. Hasil penelitian menunjukkan bahwa penggunaan varietas Kenari atau Vima 1 dan aplikasi 300 kg pupuk Phonska memberikan bobot biji kacang hijau tertinggi. Hasil tertinggi terdapat pada varietas Kenari dengan aplikasi 300 kg Phonska, yaitu sebesar 6,52 g.</p>

Its early maturity and drought resistance allows mungbean to be cultivated on upland with dry climate. Approriate cultivation technology need to be identified in order to increase productivity. The research objective was to formulate cultivation technology package by assessing interaction between plant population, optimum organic and anorganic fertilizers on mungbean. This experiment was conducted on upland Alfisol soil with type E climate in Probolinggo, East Java on dry season 2015, using split plot design, with three replications. As the main plot was plant spacing, namely: 1) 40 cm x 10 cm, 1 plant/hole, 2) 40 cm x 15 cm, 2 plants/ hole, and 3) 40 cm x 20 cm, 2 plants/hole. As the sub plot was combination of organic and anorganic fertilizers, namely: 1) without fertilizer, 2) 50 kg ZA + 50 kg SP36 + 100 kg KCl/ha, 3) 150 kg Phonska/ha, 4) 5 ton manure/ha, and 5) 75 kg Phonska + 2,5 ton manure/ha. Medium dose of NPK fertilizer (22,5 kg N + 22,5 kg P 2 O 5 + 22,5 kg K 2 O + 15 kg S) per ha and plant population of 250.000 until 333.333 plant per ha, was considered suitable to grow mungbean at upland with dry climates, based on the obtained yield. While low dose of NPK fertilizer (11,3 kg N + 11,3 kg P 2 O 5 + 11,3 kg K 2 O + 7,5 kg S) plus 2.500 kg manure/ha was capable of producing high biomass of mungbean up to 3,2 kg/ha.

Abstract. Lestari SAD, Sutrisno, Kuntyastuti H. 2017. Short Communication: Effect of organic and inorganic fertilizers application on the early-medium maturing soybean yield. Nusantara Bioscience 10: 1-5. Efforts to increase soybean productivity can be made with the application of organic and inorganic fertilizers. Large amounts of organic fertilizer are required to give a positive impact on soybean yield. However, this practice is deemed inefficient in terms procurement and transportation, making farmers less interested. The addition of inorganic fertilizer or the use of nutrient-rich organic fertilizer (Santap NM2) is among the solutions. The objective of this research was to formulate management techniques for organic and inorganic fertilizers application on the early-medium maturing soybean line, Lokal Jateng/Sinabung-1036, to achieve the soybean's maximum potential yield. The research was conducted on Alfisols at Muneng Research Station, Probolinggo, and Vertisols at Ngale Research Station, Ngawi, in the dry season of 2012. The experiment was performed in a randomized complete block design with factorial, with three replications. The first factor was four doses of organic fertilizer and the second factor was four combination doses of ZA, SP-36, and KCl fertilizers. On the Alfisols of Probolinggo, Lokal Jateng/Sinabung-1036 soybean did not require additional inorganic fertilizers to achieve a yield of 2.71 t/ha, whereas on the Vertisols of Ngawi, Lokal Jateng/Sinabung-1036 soybean need 2 t /ha Santap NM2 to increase its yield from 2.60 t/ha to 2.81 t/ha.

The research was aimed to determine soybean productivity in various technological packages for soybean cultivation under palm oil plantations on tidal swamps. The research was conducted in Barito Kuala, South Kalimantan, using a randomized block design with four replications. The treatment consists of six technological packages, namely: (1) farmer’s technology, (2) recommendation, (3) improvement-1, (4) improvement-2, (5) improvement-3, and (6) improvement-4. The results indicate that plantations of oil palm on type C tidal swamps is suitable for soybean development. On the tidal swamps with pH soils 4.30, low of K and Ca, recommendation technology can increase pH soils from 4.30 to 5.15; availability of P, Ca and Mg; N and K uptake; plant weight; filled pods and increase seed yields 86% from farmer’s technology 1.00 to 1.86 t/ha. Improvement-1 technology increase pH soils from 4.30 to 6.05; nutrient availability (N, P, K, Ca and Mg); K uptake; plant weight; root nodules; filled pods and increase seed yields 100% from farmer’s technology 1.00 to 2.00 t/ha. Increased doses of dolomite, organic, N and P fertilizers from improvement-1 technological packages did not significantly increase seeds yield. This finding suggest that for developing soybean on tidal swamps, recommendation or improvements-1 technological packages could be recommended.

Kuntyastuti H, Lestari SAD. 2017. Application of manure and NPK fertilizer on Grobogan variety and Aochi/W-C-6-62 soybean as promise line in lowland Vertisol Ngawi, Indonesia. Nusantara Bioscience 9: 120-125. The effort to increase the productivity and production of soybean in lowland can be done with application of organic and/or inorganic fertilizer combined with promise line or large seed size soybean varieties that have high yield potential. Application of manure can increase soybean seed yield, but it needs a very high dose of more than 10 t manure/ha, so that often inhibits the supply, transportation, and application. The objective of this research was to evaluate the application of manure and NPK fertilizer on large seed size soybean which is Grobogan variety and Aochi/W-C-6-62 soybean as promise line in lowland Vertisol. The research was conducted in lowland Vertisol Ngawi on dry season (DS) 2011. The experiment used factorial randomized complete block design with three replications. The first factor was four doses of manure and the second factor was four doses combination of NPK fertilizer. The result showed that, on Vertisol soil Ngawi, Grobogan variety soybean need 2.5 t manure/ha to increase yield from 1.65 t/ha to 1.84 t/ha. To get a high yield of Aochi/W-C-6-62 soybean as promise line, there is two options fertilization. Aochi/W-C-6-62 need 7.5 t manure/ha to increase yield from 1.76 t/ha to 2.05 t/ha without inorganic fertilizer. Aochi/W-C-6-62 need 50 kg ZA + 150 kg SP-36 + 50 kg KCl/ha, but does not require additional manure to achieve 2.05 t/ha.