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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Pembangunan Pedesaan

Suwarto

Fakultas Ekonomi Universitas Jenderal Soedirman

Author-ID : 436597

Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Other

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UJI ADAPTASI VARIETAS UNGGUL PADI GOGO PADA POLA TANAM TUMPANGSARI DENGAN TANAMAN UBIKAYU DI KABUPATEN PURBALINGGA(ADAPTABILITY OF HIGH YIELDING UPLAND RICE VARIETY ON THE INTERCROPPING WITH CASSAVA IN PARBALINGGA REGENCY) , Suwarto
Pembangunan Pedesaan Vol 1, No 1 (2001)
Publisher : Pembangunan Pedesaan

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Penelitian ini telah dilakukanp ada musim penghujan tahun 2000 di Dcsa Pesunggingan, Pengadegan Purbalingga. Tujuan penelitian ini adalah untuk rnengevaluasi varietas padi gogo yang cocok untuk tumpangsari dengan tanaman ubi kayu. Empat varates tanaman padi gogo yang sempat diuji adalah danau tempe, poso, jatiluhur, IR 64. Hasil penelitian menunjukkan bahwa sistem tumpangsari padi gogo Dengan tanaman ubikayu dapat dikembangkan di Purbalingga. Padi gogo varietas danau Tempe memberikan hasil dan keuntungan terbesar.

Defisit Evapotranspirasi sebagai Indikator Kekurangan Air pada Padi Gogo (Oryza sativa L.) Eko Sulistyono; , Suwarto; Yulianti Ramdiani
Indonesian Journal of Agronomy Vol. 33 No. 1 (2005): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The research was conducted to study the correlation between deficit of evapotranspiration and yield decreasing. Factorial experiment was arranged in Randomized Block Design. First factor was irrigation frequency of 1, 2, 4 and 6 days. Second factor were nine upland rice lines. Evapotranspiration was measured with simple lysimeter based on water balance. There was positive correlation between deficit of evapotranspiration and yield decreasing. Defisit of evapotranspiration as much as 240.06 mm caused yield decreasing of 90% and dry matter weight decreasing of 72.5%. The relation between total evapotranspiration (E, mm) and dry matter weight (DM, g/plant) was DM = 0.0245 E + 13.85. Water use efficiency or yield and evapotranspiration ratio correlated with leaf width and sum of seed each panicle positively . Increasing leaf width and sum of seed each panicle could increase water use efficiency. Key Words : evapotranspiration, water use efficiency, upland rice, lysimeter.

Kompetisi Tanaman Jagung dan Ubikayu dalam Sistem Tumpang Sari , Suwarto; Sudirman Yahya; , Handoko; Muhammad Ahmad Chozin
Indonesian Journal of Agronomy Vol. 33 No. 2 (2005): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Intercropping system of maize and cassava has been practiced widely by Indonesian farmer on dry land. Competition between the plant will happen in the system. Field experiment to understand about the competition has been conducted. Field experiment of growing maize (Arjuna, Pioneer 4, and Cargill 9 in various planting densities) and cassava (Adira 1) was conducted for monoculture and intercropped plants. Intercropped cassava increased intraspesific competition of maize. Yield of maize variety of Arjuna, Pioner 4, and Cargill 9 decreased by about 9.7%, 6.7%, and 16.9% respectively. Maize also reduced growth and yield of cassava. When intercropped with Arjuna, pioner 4, and Cargill 9 at the highest density (80 000 plants ha-1), yield of cassava tuber decreased by about 40.6%, 43% and 64.3%, respectively. However, the intercropping still gave a better land productivity, where land equivalent ratio (LER) was larger than 1.0. Key words: intercropping, competition, maize, cassava

Agribisnis Terpadu Bersistem Leisa di Lahan Basah : Model Hipotetik Wahju Q. Mugnisjah; , Suwarto; Ahmad S. Solihin
Indonesian Journal of Agronomy Vol. 28 No. 2 (2000): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

LEISA refers to forms of agriculture that seek to optimize the use of locally available resources by combining the different components of the farm system (i.e. plants, animals, soil, water, climate and people) so that they complement each other and have the greatest possible synergetic effects: In the system of LEISA proposed here, ecological risks generated by the external inputs are avoided; and reversally, the farm system performance is enriched by the use of internal inputs (including by products)p reduced in the agro-ecosystem. The external inputs in the form of agro-chemicals (inorganic fertilizers and pesticides) are used in a limited to replace nutrients transported out of the agro-ecosystem through harvest. Selecting a hypothetical model of LEISA by integrating crop production (1.25 ha),fish nursery (0.50 ha), and duck husbandry (1000 ducks at the dike of pond) shows that the system being feasible. The hypothetical model needs investation cost as much as Rp 64 195 000 and operational cost of Rp 41289825, giving a total cost of Rp 105484825 (as lending cost). Based on the estimation of monthly cash flow with annual DF 18% and grace period of 11 months, the hypothetical model gives NPV at the 36th month = Rp 38 556 960, Net B/C = 1.43, IRR = 39.42. and payback periods = 25 months. Key words: Leisa, Agribisniss, Wet land, Model

PENGARUH PUPUK NITROGEN DAN TINGGI MUKA AIR TANAH TERHADAP PERTUMBUHAN BINTIL AKAR, PERTUMBUHAN DAN PRODUKSI KEDELAI (Glycine max (L.) Merrill) , SUWARTO; Wahju Qamara MUGNISJAH; DIDY SOPANDIE; ABDUL KARIM MAKARIM
Indonesian Journal of Agronomy Vol. 22 No. 2 (1994): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Pot experiments and laboratory analysis were conducted to determine the effect of N fertilization and level of water table treatments of wet soybean culture on nodule formation and seed yield of soybean. The pot experiment was conducted in Cibungbulang and laboratorium analysis, was at three different laboratories: Soil, Agronomy, and Pasture, Bogor Agricultural University, started on August, 1993 up to February, 1 994. Three factors to be evaluated, namely varieties (Lokon and Lompobatang), N fertilizer applications of 0, 140, and 280 mg pot -1 (equivalent to 0, 25, and 50 kg N ha -1), and the level of water tables of (control, -15 cm, -10 cm, and -5 cm below the soil surface). They were arranged in randomized complete design. The highest value of nodule dry weight of Lokon variety (0.707 p. was resulted from the plant grown under -15 cm water table without N fertilizer (0 mg N pot- ). Lompobatang highest value (1. 727g) on -10 cm water table and fertilized with 140 mg N pot -1. The increases of nodule dry weight by the treatment were 0.300 g (73.7%) for Lokon and 1. 134 g (194.5%) for Lompobatang, respectively compared to control. Both varieties showed highest value of seed weight per plant if grown under -15 cm water table and fertilized with 140 mg N pot -1. Compared to control media, respective increased seed weight per plant 1.94 g (12.9%) for Lokon and 5. 40 g (25.4%) for Lompobatang.

Efisiensi Penggunaan Cahaya Matahari oleh Tebu pada Berbagai Tingkat Pemupukan Nitrogen dan Fosfor Wawan Pembengo; , Handoko; , Suwarto
Indonesian Journal of Agronomy Vol. 40 No. 3 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Light use efficiency is a crucial parameter in plant growth associated with accumulation of energy interception. Nitrogen and phosphorus deficiency reduce leaf area index (LAI) and specific leaf nitrogen and phosphorus (SLN and SLP) content and reduce efficiency of light intercepted by plant canopy structure. This research was conducted in Kebun Bunga Mayang PTPN VII, North Lampung Regency, Lampung Province (04050’S, 104052’E, 38 m above sea level) from July 2008 to September 2009. Treatments were distributed in the field under a randomized complete block design factorial with three replications. The increase in nitrogen fertilizer (N) improved sugarcane light use efficiency. The light use efficiency of the sugarcane plants fertilized with 225 kg N ha-1 was 2.29 g MJ-1 at maximum stem phase. On the contrary, the increasing of phosphor (P) fertilizer did not affect light use efficiency but increased stem dry matter at maximum seedling phase or about 3 month after planting (3 MAP), at maximum stem phase (9 MAP), and at harvest (11 MAP); total dry matter at seedling phase (5 MAP) and at maximum stem phase (9 MAP). Nitrogen did not interact with P in affecting light use efficiency. Keywords: fertilization N and P, interception radiation, light use efficiency, sugarcane

Co-Authors , Handoko ABDUL KARIM MAKARIM Ahmad S. Solihin Didy Sopandie Eko Sulistyono M A Chozin Sudirman Yahya Wahju Q. Mugnisjah Wahju Qamara Mugnisjah Wawan Pembengo Yulianti Ramdiani

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