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INDONESIA
Jurnal Tanah dan Iklim
Published by Balai Besar Penelitian dan Pengembangan Sumberdaya lahan Pertanian
ISSN : 14107244     EISSN : 27227723     DOI : http://dx.doi.org/10.21082/jti.v44n1.2020.19-29
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal TANAH dan IKLIM memuat hasil-hasil penelitian bidang tanah dan iklim dari para peneliti baik dari dalam maupun dari luar Balai Besar Litbang Sumberdaya Lahan Pertanian. Jurnal ini juga dapat memuat informasi singkat yang berisi tulisan mengenai teknik dan peralatan baru ataupun hasil sementara penelitian tanah dan iklim.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "No 32 (2010): Desember 2010" : 7 Documents clear
MODIFICATION OF C-USLE FACTOR IN ANSWERS MODEL TO PREDICT SOIL EROSION IN HUMID TROPICAL REGION (CASE STUDY OF NOPU UPPER CATCHMENT, CENTRAL SULAWESI) HIDAYAT, Y.; SINUKABAN, N.; PAWITAN, H.; MURTILAKSONO, K.
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

Abstract

The research was carried out: a) to define crop and management factors as input parameter of ANSWERS model, b) to establish an ANSWERS to PCRaster model to simulate land use changes and soil and water conservation techniques, and c) to study the impact of rainforest conversion towards surface runoff, soil erosion and nutrients losses. Surface runoff and soil erosion were measured daily on primary forest, secondary forest, open areas, maize, peanut, young cocoa, medium cocoa, old cocoa, and intercropping between young cacao, maize, banana, and cassavas. In watershed outlet, surface runoff and sediment discharges were determined through measurement of water height, velocities and sediment sampling. Using a partial crop and management factors, the original and PCRaster type of an ANSWERS model performs better in predicting soil erosion thanUSLE crop and management factors especially for high rainfall events. Reforestration of very steep land (slope > 45%) which followed by application of ridge terraces on agricultural areas were the best management practices to control surface runoff and soil erosion to ensure sustainable agriculture andsustainability of watershed functions. Rainforest conversion to agricultural areas increases surface runoff, soil erosion andnutrients losses.
Impact of Landuse Change to Erosion at Cidanau Watersheed, Banten K. MUNIBAH; SANTUN R.P. SITORUS; E. RUSTIADI; K. GANDASASMITA; . HARTRISARI
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

Abstract

Landuse is a manifestation of relationship between human activities and environmental changes, like erosion. Impact of landuse change to erosion was already happened, such as decreasing of soil fertility, flood at low land. An anticipation of landuse change was one of several alternatives that can minimize erosion. The objectives of this research were to analyze the impact of landuse change and to create the recommendation of landuse that can minimize erosion. Prediction map of landuse on 2018 and 2030 were obtained from previous research. Erosion rate were caluculated based on Universal Soil Loss Equation (USLE). This research predicted that landuse change could increase erosion rate, with asumsion if no change in term of RKLS values. The actual erosion rate (A) were 149,7 t ha-1 year-1 (2006), 154,4 t ha-1 year-1 (2018), and 159,2 t ha-1 year-1 (2030). This erosion rate were 3,7-4,9 times bigger than the tolerable erosion rate (TSL = 40 t ha-1 year-1). Modification of C and P values could minimize the actual erosion rate (A) until less than the tolerable erosion rate (A<TSL). Results of this research could be used as input for landuse planning, especially for landuse that would increase erosion rate.
SOILS DEVELOPED ON SERPENTINITE IN PANYIPATAN DISTRICT, SOUTH KALIMANTAN : CHARACTERISTICS AND THEIR SUITABILITY FOR MAIZE YATNO, EDI; PRASETYO, BAMBANG HENDRO
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

Abstract

Four representative soil pedons formed from ultrabasic or serpentinite parent materials were studied in the field and laboratory in order to determine their soil characteristics and suitability for maize. Maize is one of the most important agricultural food crops in Indonesia. Up to now, the need of this crop for any other usages tends to increase. However, maizeproduction could not meet the demand. Therefore, extensification and intensification of the agricultural area for the crop cultivation need to be conducted. The results indicated that all the studied soils have deep solum, yellowish red to red colour, blocky structure, and friable to firm consistency. Particle-size distribution was dominated by clay fraction (73-88%). The soil bulk density and available water was relatively low (0.84-1.12 mg m-3 and 9-15%, respectively), while the total porosity was high (58-68%). Except pedon PN-35, some soils have acid reaction, medium C organic in the upper horizons, and low base saturation (&lt;40%). The soil CEC and exchangeable Al were low (&lt;12 and &lt;1.3 cmolc kg-1, respectively). P retention of all the soils is high (60-87%). The soils were classified as Typic Hapludox, Anionic Acrudox, and Kandiudalfic Eutrudox. Most soils were moderately suitable (S2) for maize cultivation with nutrient retention (acidreaction, low CEC-clay and base saturation) and water availability (high wet months) as the main limiting factors. To increase soil productivity, application of agricultural lime, P fertilizers (rock phosphate) and organic matter were highly recommmended.
Forecasting Model of Rice Production Using Weighted Rainfall Index in Subang, Karawang, and Indramayu Regency . SUTIKNO; R. BOER; A. BEY; K. ANWAR NOTODIPUTRO; I. LAS
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

Abstract

Various forcasting models of rice production have been developed to support national food security. The forecasting models of national production which use recently have been carried out by the BPS and have not include the climate factors. Whereas, the climate factors influenced the rice’s production. The aim of this research is to develop the harvest area model using independent variables : Weighted Rainfall Index (WRI), SeaSurface Temperature (SST) Nino 3.4, and Dipole Mode Index (DMI). The models which developed was based on BPS models which consist of 3 periods. There are period 1 (January-April), period 2 (May-August), period 3 (September-December).  Furthermore, rice production forecasting is the multiplication of harvest area and yield per ha. Rice production forecasting in one year is sum of the 3 periods. The research location are pantura areas, namely Karawang, Subang, and Indramayu. The result of the research showed that the model performance by WRI for period 2 (May-August) is better than period 1 and period 3. The mean of error for harvest area forecasting for periode 1, 2, and 3 of WRI variable, respectively is 14, 13, and 47%. Based on model validation, harvest area models by independent variable using WRI, SST Nino 3.4, DMI and ratio of harvest area and standard area, relatively have the same performance. One of the reasons is correlation between SST Nino 3.4 and DMI withrainfall is high. Mean of error for rice’s production forecasting of WRI are 13, 15, and 49%, while SST Nino 3.4, DMI, ratio of harvest area and standard area are 29, 12, and 51%. The range of error rice production forecasting at second year are 10-11%.
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

Abstract

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%.
Sustainability Index of Rice Field for Supporting Spatial Planning (Case Study in Jember District, East Java) . NURWADJEDI; BUDI MULYANTO; SUPIANDI SABIHAM; ARIS PONIMAN; . SUWARDI
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

Abstract

Rice Field agriculture in Jember district is a main sector due to its contribution to rice production in this region. The objective of this study is to determine the rice field sustainability index based on agro-ecosystem zone and to formulate policy alternatives for supporting the spatial planning in achieving sustainable rice field agriculture. The study used the primary andsecondary data which include biophysical environment, economy, social and culture. The data analysis used GIS (Geographic Information System) modelbase, factor analysis, and AHP (Analytical Hierarchy Process). The results showed that the sustainability index of the rice field agro-ecosystem zones were different. The threats of the rice field sustainability were causedby the main indicators of the biophysical environment, economy, social, and culture such as water availability, soil nutrients of Carbon organic content, Nitrogen, and Phosphor-available, profit, fertilizer access, land conversion, land ownership and fragmentation, farmer education, and age of farmer. To overcome those threats, the policy consideration was more dominantly determined by the biophysical factor rather than that of theeconomy, social, and culture. The implementation of the policy tohandle the threats needs to be coordinated among the stakeholders, considering that the rice field resource can be categorized into a common pool resource.
Soil Leaching of on Particular Condition of Redox Potential by Insitu Water Source in Balandean South Kalimantan M. ALWI; SUPIANDI SABIHAM; S. ANWAR; . SUWARNO; . ACHMADI
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

Abstract

The experiment was conducted in Soil Fertility Laboratory, Agriculture Faculty, IPB from March to July 2009. The treatment was arranged in Factorial Completely Randomized Design with two factors i.e. insitu water source and condition of redox potential. Water source for leaching was fresh water, peat water, and brackish water. The condition of redox potential consisted of: -100 ± 25, 0 ± 25, 100 ± 25, 200 ± 25, 300 ± 25, and 400 ± 25 mV. In leachate water on redox potential as 400 mV, the concentration of Fe2+, total Fe, SO42-, and Al were 376.76, 554.44, 961.55, and 180 ppm respectively (at first week) decreased into 227.20, 312.22, 506.86, and 44 ppm (at eight week). Whereas in leachate water that leaching by peat water, at the first week concentration of Fe2+, total Fe, SO42-, and Al were 412.50, 493.11, 823.57, and 110.50 ppm decreased into 253.65, 302.50, 463.60, and 29.50 ppm at the eighth week. After leaching as long as eighth weeks, concentration of Fe2+, total Fe, SO42-, and Al in soil material decreased from 578.26 ppm, 3680 ppm, 1011.26 ppm, and 18.66 me 100g-1 to 350.26 ppm, 3095 ppm, 376.76 ppm, and 11.79 me 100g-1.

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