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Pengkajian Penerapan Teknologi Pengolahan Manisan Mangga Kering di Kabupaten Indramayu Wayan Sudana; Kasdi Subagyono
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 15, No 2 (2012): Juli 2012
Publisher : Balai Besar Pengkajian dan Pengembangan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jpptp.v15n2.2012.p%p

Assessment on Determinant Factors of Innovation Adoption for Integrated Crop management on Rice through Integrated Crop Management-Farmer School. In order to increase national rice production, the government through the Ministry of Agriculture launched a policy of accelerated ICM in rice production centers.To support these policies, this study aims to find the determinants factors of ICM adoption by farmers, as well as the characteristics of the farmers. The data was collected through direct interviews to farmers implementing ICM in eight regions of AIAT executing of ICM-FS, with the number of respondents in each region were 10 rice farmers implementing ICM and 10 non-executing ICM farmers, hence the number of respondents were 80 ricefarmers implementing ICM and 80 non-executing ICM farmers. The results of the analysis indicated that the acceleration of innovation adoption were determined ICM by farmers include age, education level of farmers, farm costs as well as the ratio of extension worker number to researcher number in AIAT. Its means that the opportunities of ICM adoption were higher when the farmers are relatively young and the level of educations were high. The ICM-FS method of could increased the productivity up to 17% or by 0,7 t/ha compared to the existing conditions.Key Words: rice, adoption, and productivity, ICM FS Dalam rangka peningkatan produksi padi nasional, pemerintah melalui Kementerian Pertanian cepatan penerapan inovasi PTT padi terutama pada sentra produksi padi. Untuk mendukung kebijakan tersebut, kajian ini bertujuan untuk mengetahui faktor penentu adopsi inovasi PTT padi, dan hubungannya dengan karakteristik petani adopter. Pengumpulan data dilakukan melalui wawancara terhadap petani peserta PTT padi di delapan wilayah BPTP peserta SL-PTT, dengan jumlah responden per wilayah adalah 10 petani peserta PTT padi dan 10 petani non peserta PTT padi, sehingga total responden 80 petani peserta PTT dan 80 petani non peserta PTT. Hasil analisis menunjukan bahwa ; faktor penentu percepatan adopsi inovasi PTT padi di antaranya adalah umur, tingkat pendidikan petani, biaya usahatani serta jumlah penyuluh dan peneliti di BPTP. Artinya peluang adopsi teknologi PTT makin tinggi apabila kelompok pelaksana SL adalah yangumurnya relatif muda dengan tingkat pendidikan relatif lebih tinggi dari rata-rata pendidikan anggota kelompok taninya. Metoda SL dapat meningkatkan produktivitas 17% atau 0,7 t/ha dari produktivitas yang dicapai petani selama ini.Kata Kunci : padi, adopsi, produktivitas, SL-PTT

PORE SIZE DISTRIBUTION AND FLOW CHARACTERISTICS IN A FORESTED HEADWATER CATCHMENT Kasdi Subagyono; Tadashi Tanaka
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 19, No 2 (2009)
Publisher : Indonesian Institute of Sciences

ABSTRACT It is obvious in recent publications that pores and pores size distribution play an important role in flow generation, yet the study of dynamic behavior of the effects of pores and pores size distribution on flow characteristics is somewhat rare. As micro pores, mezzo pores and macro pores are various in the soil, the distribution as well as characteristics of those pores are the major factor of flow characteristics in the soils. Pores size distribution was determined considering the volumetric water content at each matric head defined from soil water characteristics curves. Mathematically, pores size distribution is calculated using formula of r = 0.15/h, where r is radius of the pore and h is matric head. The flux of water was determined by installing tensiometer and piezometer in a transect across the hillslope and riparian zone. The results showed that the different of those between hillslope and riparian provides insight that the effects of pores and pores size distribution varies with hydrological zone. In riparian zone, flows are highly affected by micropores (R2 = 0.49), mezopores (R2 = 0.26) and total porosity (R2 = 0.28), while in hillslope side only micropore is dominant. The relationship between pores size distribution and water flow suggested that in hillslope side the flow was dominated by slow flow as micro pores has affected, while in riparian zone the rapid flow was more obvious as mezopores and total porosity have affected.

Kontribusi Sumber Aliran pada Pembentukan Air Limpasan dari Lelehan dan Hujan Salju di Cekungan Hulu Kawakami, Jepang Tengah Kasdi Subagyono
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 23, No 1 (2013)
Publisher : Indonesian Institute of Sciences

ABSTRAK Penetapan sumber air yang berkontribusi dalam proses air larian sangat penting untuk mengkarakterisasi proses hidrologi di daerah beriklim sedang. Penelitian dilakukan terhadap pelelehan salju tanggal 28 Maret 2001 dan hujan pada salju tanggal 29 Maret 2001 di Kebun Penelitian Kawakami, Provinsi Nagano, Jepang bagian Tengah. Pengukuran parameter hidrometrik dan hidrokimia serta Analisis Percampuran Sumber Air (EMMA) menggunakan Ca2+ dan SO42-dilaksanakan untuk menentukan sifat dinamis dari jalur aliran air dan untuk menganalisis sumber air yang berkontribusi terhadap proses larian. Tiga sumber air yang meliputi air bumi dangkal di zona Riparian, air tanah di zona pelerengan, dan air bumi dalam di zona Riparian teridentifikasi sebagai sumber air utama dalam menentukan proses larian di DAS hulu berhutan wilayah Kawakami, masing-masing 55%, 23% dan 22% serta 73%, 12%, dan 15%. Analisis hidrometrik menunjukkan bahwa air larian bawah permukaan selama kejadian pelelehan salju dan hujan pada salju didominasi oleh aliran air bawah permukaan khususnya pada zona Riparian. Hal ini merupakan alasan mengapa air bumi dangkal di zona Riparian memiliki kontribusi terbesar pada kejadian larian. Puncak larian pada 28 Maret 2001 diidentifikasi saat pelelehan salju terjadi pada pukul 14.00 yang berkorelasi dengan suhu tertinggi. Sementara itu puncak larian pada kejadian hujan pada salju terjadi pukul 16.00 dimana jumlah hujan merupakan faktor penentu kejadian larian tersebut.

EFFECT OF LAND USE ON SPATIAL AND SEASONAL VARIATION OF WATER QUALITY IN CILIWUNG RIVER, WEST JAVA-INDONESIA Eleonora Runtunuwu; Akihiko Kondoh; Kasdi Subagyono
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 20, No 1 (2010)
Publisher : Indonesian Institute of Sciences

ABSTRACT Study on water quality aspects of Ciliwung river has been conducted from January 2008 to November 2009 to address the impact of land use change on its seasonal variation. Nitrogen compound of NO2 and NH4 were monitored along the Ciliwung river with different time. Land use change within the Ciliwung watershed was analyzed using remote sensing data and correlate with NO2, NO3, NH4 concentration, conductivity and pH along the river. The results showed that in area with higher populated areas such as found in the middle and downstream area of Ciliwung watershed, NO3 concentration is higher. This obvious variation was also observed for conductivity and pH. It was also observed that the more dense area as in the middle and downstream area the change of land use was obvious. The NO3 concentration is much influenced by land use and vegetation change prior to human activity. In general, NO3 observed on October 2008 was higher compared with that observed on January, April and July 2008. In October where it is rainy season, flushing of NO3 is higher and it was transported into the Ciliwung river. The temporal variation is seemed to be due to variation of rainfall generating different runoff and nutrient flushing surrounding river.

KAJIAN FAKTOR-FAKTOR PENENTU ADOPSI INOVASI PENGELOLAAN TANAMAN TERPADU PADI MELALUI SEKOLAH LAPANG PENGELOLAAN TANAMAN TERPADU Wayan Sudana; Kasdi Subagyono
Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Vol 15, No 2 (2012): Juli 2012
Publisher : Balai Besar Pengkajian dan Pengembangan Teknologi Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jpptp.v15n2.2012.p%p

Assessment on Determinant Factors of Innovation Adoption for Integrated Crop Management on Rice through Integrated Crop Management-Farmer School. In order to increase national rice production, the government through the Ministry of Agriculture launched a policy of accelerated ICM in rice production centers. To support these policies, this study aims to find the determinants factors of ICM adoption by farmers, as well as the characteristics of the farmers. The data was collected through direct interviews to farmers implementing ICM in eight regions of AIAT executing of ICM-FS, with the number of respondents in each region were 10 rice farmers implementing ICM and 10 non-executing ICM farmers, hence the number of respondents were 80 rice farmers implementing ICM and 80 non-executing ICM farmers. The results of the analysis indicated that the acceleration of innovation adoption were determined ICM by farmers include age, education level of farmers, farm costs as well as the ratio of extension worker number to researcher number in AIAT. Its means that the opportunities of ICM adoption were higher when the farmers are relatively young and the level of educations were high. The ICM-FS method of could increased the productivity up to 17% or by 0,7 t/ha compared to the existing conditions.Key Words: rice, adoption, and productivity, ICM FSDalam rangka peningkatan produksi padi nasional, pemerintah melalui Kementerian Pertanian mencanangkan kebijakan percepatan penerapan inovasi PTT padi terutama pada sentra produksi padi. Untuk mendukung kebijakan tersebut, kajian ini bertujuan untuk mengetahui faktor penentu adopsi inovasi PTT padi, dan hubungannya dengan karakteristik petani adopter. Pengumpulan data dilakukan melalui wawancara terhadap petani peserta PTT padi di delapan wilayah BPTP peserta SL-PTT, dengan jumlah responden per wilayah adalah 10 petani peserta PTT padi dan 10 petani non peserta PTT padi, sehingga total responden 80 petani peserta PTT dan 80 petani non peserta PTT. Hasil analisis menunjukan bahwa ; faktor penentu percepatan adopsi inovasi PTT padi di antaranya adalah umur, tingkat pendidikan petani, biaya usahatani serta jumlah penyuluh dan peneliti di BPTP. Artinya peluang adopsi teknologi PTT makin tinggi apabila kelompok pelaksana SL adalah yang umurnya relatif muda dengan tingkat pendidikan relatif lebih tinggi dari rata-rata pendidikan anggota kelompok taninya. Metoda SL dapat meningkatkan produktivitas 17% atau 0,7 t/ha dari produktivitas yang dicapai petani selama ini.Kata Kunci : padi, adopsi, produktivitas, SL-PTT

Sectoral Impact and Current Coping Mechanisms: Water Resources and Agriculture KASDI SUBAGYONO; ERNI SUSANTI
Jurnal Sumberdaya Lahan Vol 3, No 1 (2009)
Publisher : Indonesian Center for Agriculture Land Resource Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jsdl.v3n1.2009.%p

Available water resources and its quality in Indonesia have been deteriorated as an impact of climate change (and/or) environmental degradation. This could affect on farming processes particularly and agricultural development in general. Virtual available surface water gives a figure that available water decreased temporally and spatially. For instance, in Java island with cover 65% of total population only has 4.5% of the total available water in the country. Agriculture is the biggest use of water (about70%), but it will be difficult for farmers to accomplish water requirements. Other users such as domestic (about 6%), industry (about7%), and municipal (about 4%) are also the major users of water in the country, which may raise a conflict among the users in covering the needs. Current mechanisms to cope climate change in water resources management has been executed through adaptation and mitigation measures for supporting farming system. Integrated water resources management plays critical role in coping climate change. This includes prioritizing water requirements, water harvesting, water conservation, appropriate water allocation, and pollution control. For sustainable farming system development, mitigation strategy should also be included in themechanism covering practices of intermittent irrigation to over come high rate of methane emission. Combining water management and tolerance crops to drought and submergence conditions is very valuable in implementing the mechanisms.

Predicting Discharge from Agricultural Catchment to Support Land and Water Management in Singkarak Basin, West Sumatra KASDI SUBAGYONO; BUDI KARTIWA
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 29 (2009): Juli 2009
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n29.2009.%p

Limited hydrological data in Paninggahan sub catchment in Singkarak basin has resulted in inappropriate land management practices for farming system development. Predicting stream flow using an appropriate hydrological model is critical for a catchment with limited data recording. The present study has been conducted from January 2006 to December 2007. The objective of this study is to characterize hydrological condition of the catchment and to predict river flow for supporting design of landand water management options. To some extend, the study is to provide inputs in negotiation of farmers community with other stakeholders in the Singkarak basin. An automatic water level recorder (AWLR) and an automatic weather station (AWS) have been installed in the catchment to record hydro-meteorological data in order to calibrate hydrological model for predicting river flow. An instantaneous discharge model based on Geomorphological Instantaneous Unit Hydrograph (H2U) and a daily discharge model of GR4J were used to predict the river flow. The instanteneous hydrological data suggested that stream discharge sharply increased during onset rain and implying that the draining water was dominated by rapid flow. After peak storm has been reached, the water was slowly released to the river the one is typical hydrological process for disturbed catchments where rainfall water may no longer be retained in thecatchment. Application of both hydrological models in Paninggahan sub catchment during a period of March to April 2006 has given an appropriate result. The GR4J model has been calibrated and has given the value of similarity coefficient of 87.9%, while calibration of H2U model applied for storm event and has given the value of similarity coefficient of 96%. Thesucceed of predicting discharge using both models is valuable to support planning program in land and water management for farming system development in the Singkarak basin.

Soil Destruction Level at Upstream of Cikapundung Sub Watershed on The North of Bandung Area N. SUTRISNA; SANTUN R.P. SITORUS; KASDI SUBAGYONO
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 32 (2010): Desember 2010
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n32.2010.%p

The upstream of Cikapundung sub watershed is the high land which is located on the North of Bandung Area. The soil is fertile, therefore the land is used as farming. The agriculture land is slope and the farmers have not applied the technology of conservation yet, as the result the soil susceptible to erosion. Consequently it decreases the productivity of land. The objectives of study were: (1) to evaluate erosion (value and risk erosion) at the use of land existing and (2) to investigate soil destruction level by erosion and its impact to productivity of land at upstream of Cikapundung sub watershed. The research used survey method. The data consisted of secondary data and primary data. The secondary data was collected through desk study, whereas primary data was collected through interviewed farmers, the soil observation, and soil sample analyses that is included the contain of sand, dust, and clay; C-organic; and nutrient content (N, P, K, and Ca) at Laboratory. The data analysis was done according to descriptive. The result showed that the most soil erosion was at the type of vegetable land use which use intensively at slope 25-40%.Value erosion roundabout 22.57-597.76 ton ha-1 year-1 or 0.33-8.79 cm. Level of destruction soil by erosion at upstream of Cikapundung sub watershed majority was medium critic (the upper soil was loss >75%) and spread at some units land. During five years, the impact of erosion decreased C-organic 60.05%, N 44.7%, P 52.3%, K 24.7%, and Ca 27.2%. Productivity Potato decrease 60%, whereas cabbage 40%.

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