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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 5 Documents
 1 
Search results for , issue "No 24 (2006): Desember 2006" : 5 Documents clear
Applying Climate Information for Supporting Farming System of Food Crop ELZA SURMAINI; RIZALDI BOER; H. SIREGAR
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 24 (2006): Desember 2006
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n24.2006.%p

Abstract

The events of climate extreme that increase the crop yield uncertainty causing financial loss of farmers. To ensure economic profitability, farmers need to tailor their cropping pattern to the climate forecast. The study was conducted in Ciparay and Bojongsoang sub-District, the central crop production of Bandung District from March to August 2005. Research aimed to analyze climate information value based on farming system strategy for accruing farmer income. Farming system in climate extremeevents was determined by maximizing expected utility of wealth. Farming system in two sub-District was assessed by Rapid Rural Appraisal. Climate information value was the difference between income with conventional farming and income using farming system strategy. Result of the survey indicated that dominant cropping pattern in the study area was rice-rice-fallow. The second rice was vulnerable to drought particularly in extremeyears. Further analysis suggested that extreme climate events were mostly associated with ENSO (El-Niño Southern Oscillation) events. From farming system simulation model, it was found that in El-Niño years, to maximize income, farmers should planted all farm with maize. Planting non-rice crops can be done after April (early May), to get maximist income, they should plant all farm with soybean. Risk averter farmers might diversify their crops, i.e. by fallowing part of their lands and planting the remaining lands with maize and soybean. The use of climate information in El-Niño years will give higher economic benefit to farmers than in La-Niña years. The difference in economic benefit was determined by the proportion of land allocated for rice and nonrice crops. In El-Niño years, farmers who plant all their lands for second planting with rice crop will get loss due to significant decrease in rice yield, while those who plant part or all of their land with non-rice crops will gain benefit as they will get yield. Therefore, farmers who are willing to take risks by planting part or all of their land with non-rice crops in years which were forecasted to be El-Niño years will get higher income than farmers who are not willing to change their rice crops.
Identification of Predictors for Soil Water Retention of Indonesian Inceptisols YIYI SULAEMAN; . HIKMATULLAH; HUSEIN SUGANDA
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 24 (2006): Desember 2006
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n24.2006.%p

Abstract

This study aimed to build a soil hydraulic properties digital database and to identify predictors for soil water retention of Inceptisols using data from developed database. Soil survey reports were compiled and soil hydraulic properties were entried into a spreadsheet. As many as 230 datasets of Inceptisols were extracted from developed database to identify predictors for soil water retention using Banin-Amiel and Stepwise techniques. Currently, the Soil Hydroulic Properties Digital Database strores 832 datasets from Central Kalimantan, East Kalimantan, Flores Island, Lombok Island, and Gorontalo District. The dataset is dominated by Inceptisols and fine soils. The correlation between soil water retention and other soil properties, and the order of predicting effectiveness varies with matrix potensial (pF) which influenced by soil moisture regime and pedogenesis type. Total pores and cation exchange capacity are potential predictors for soil water retention of Inceptisols in addition to particle sizedistribution, organic carbon, and bulk density. The Soil Hydraulic Properties Digital Database stores research results and provides data for any study regarding soil hydraulic properties. The dataset selection for developing pedotransfer function of Inceptisols should consider both soil moisture regime and pedogenesis type.
EFFECT OF COMPACTED COMPOUND SLOW RELEASE FERTILIZER TO IMMATURE OIL PALM GROWTH AND YIELD ON XANTHIC HAPLUDOX, IN MERANGIN, JAMBI WIGENA, I GEDE PUTU; PURNOMO, J.; TUHERKIH, E.; SALEH, A.
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 24 (2006): Desember 2006
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n24.2006.%p

Abstract

Oil palm is one of promoted plantation commodity that is developed intensively by the government. This phenomena need to be supported by an appropriate management mainly the fertilization aspects to maintain its productivity at high level. Field experiment has been conducted to test the effect of the compacted compound slow release fertilizer, formulated in stick fertilizer, to immature oil palm growth and fruit bunches production on Xanthic Hapludox from 2003 to 2005. Seven fertilization treatments, namely farmer?s practice (A); recommended fertilization (B); controll (C); 1 fertilizer stick/trunk (D); 2 fertilizer sticks/trunk (E); 3 fertilizer sticks/trunk (F); and 2 fertilizer sticks combined with foliar fertilizer (Fosfo N)(G) have been tested on the experiment. All treatments were arranged in randomize complete block design with three replications. The result showed that the tested fertilizer could improve oil palm growth and increased fruit bunches production significantly. The highest yield was provided by 3 fertilizer stick/trunk (G) with growth scoring 90.30% and 31.43 kg of fruit bunches/trunk. This yield was significantly different with all others tested treatment, except recommended treatment (B) with growth scoring and fruit bunches were 87.30% and 30.57 kg/trunk/month, respectively. Compared to the recommended treatment, the application of the tested fertilizer could decrease the total fertilizers required by the farmers due to the increasing of fertilization efficiency about 50-60%. Based on nutrients dynamic and number of fertilizers required by oil palm, the existing recommended fertilization should be changed in order tomaintain nutrient balance in the soil. The proposed changes of recommended fertilization is by increasing of potassium dosage because oil palm absorp potassium at the highest number from the soil. Besides that, sulfur should be applicated due to the higher absorption by the crop from the soil, whereas the highly weathered soil has lower capacity in supplying sulfur for crop growth so that sulfur is adsorp extensively from the soil and causes imbalance nutrient in the soil.
The Influence of Rice Straw Compost on Soil Quality, Fe2+ and SO4 2- Solubility, and Rice Yield in Acid Sulphate Soil KHAIRIL ANWAR; SUPIYANDI SABIHAM; B. SUMAWINATA; A. SAPEI; T. ALIHAMSYAH
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 24 (2006): Desember 2006
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n24.2006.%p

Abstract

Oxidation of pyrite in acid sulphate soil reduced the quality of soil. The improvement of soil quality in paddy cultivation could be managed by the addition of organic matter together with regulating water to maintain its reductive condition. The objective of this research was to obtain information on the ability of rice straw compost in improving soil quality and rice production. The research was conducted in acid sulphate soil(Typic Sulfaquepts), with flooding during high tide (B type) at experimental field Belandean, Research Institute for Swamp LandAgriculture (Balittra), South Kalimantan, during dry season of 2003. Treatment for improving soil quality was in the form of the rate of application of rice straw compost. Research results indicated that the application of rice straw compost was capable to improve soil quality during vegetative phase substantiated by increasing soil pH and organic matter content, and decreasing exchangeable Al, and also increasing Fe2+ and SO42- solubility. All of the soil chemical properties determine rice production, and Alexchangeable has the highest correlation. Application of rice straw compost as much as 2.7 t ha-1 (dry weight equivalent) wascapable to increase the yield of rice by 48%. This research results indicated that the rice straw from harvest should be returned to the paddy soil.
Critical Limit of Mercury and Cadmium on Typic Dystrudepts and Typic Hapluderts of Paddy Field HUSEIN SUGANDA; ANTONIUS KASNO; BAMBANG HENDRO PRASETYO
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 24 (2006): Desember 2006
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n24.2006.%p

Abstract

Industrial wastes may pollute agricultural land, which is leading to the contamination of agricultural yield by heavy metals. The pollution of Mercury (Hg) and Cadmium (Cd) on paddy field on rice growth is hard to observe, but the contents of Mercury (Hg) and Cadmium (Cd) on hulled-rice exceed the safety level. Therefore Research should be conducted to study the critical limit of Hg and Cd in soils from paddy field. Soil polluted by Hg and Cd should be remediated physically, chemically, or biologically before it is used for agricultural land. The objectives of the study were to know the effect of heavy metal on harvest yields; to find out the relationship between the contents of Mercury and Cadmium in the soil and in rice, and to determine the critical level of Hg and Cd in the soil. The study was preceded at the laboratory for determining maximum adsorption of Mercury and Cadmium by soil, and then at green house using pots containing Typic Dystrudepts and Typic Hapluderts as muchas 7.5 kg of dry soil. Each pot was given treatments of Mercury and Cadmium with the rate of ; 0, 0.1, 0.2, 0.4, and 0.6 of maximum adsorption by soil, afterward stired and incubated for seven days. Each pot was planted with rice IR-64 as indicator plant. This experiment used Randomised Completely Design with three replicates. The research results showed that the increase of Hg content in soil does not decrease unhulled-rice yield, on the contrary the increase of Cd in soil decreases hulled-rice. Coefficient of correlation (r) between Mercury content in soil and in hulled-rice is 0.79 and 0.94 respectively, while for Cadmium is 0.98 and 0.97. The critical limit of Mercury content in Typic Hapluderts and Typic Dystrudepts is 7.1 and 13.6 mg kg-1 respectively, while the critical limit of Cadmium in Typic Hapluderts and Typic Dystrudepts is 3.9 and 6.9 mg kg-1.

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