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Agromet

agromet
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Published by Institut Pertanian Bogor

ISSN : 01263633 EISSN : 2655660X DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Agromet publishes original research articles or reviews that have not been published elsewhere. The scope of publication includes agricultural meteorology/climatology (the relationships between a wide range of agriculture and meteorology/climatology aspects). Articles related to meteorology/climatology and environment (pollution and atmospheric conditions) may be selectively accepted for publication. This journal is published twice a year by Indonesian Association of Agricultural Meteorology (PERHIMPI) in collaboration with Department of Geophysics and Meteorology, Faculty of Mathematics and Natural Sciences, IPB University.

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Articles 267 Documents

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IDENTIFIKASI DAN KARAKTERISASI POTENSI AIR TANAH UNTUK PENGEMBANGAN IRIGASI SUPLEMENTER DI PABRIK GULA RENDENG DAN TRANGKIL JAWA TENGAH (IDENTIFICATION AND CHARACTERIZATION OF GROUND WATER POTENTIAL FOR DEVELOPING SUPLEMENTARY IRRIGATION IN ... P. Rejekiningrum; F. Ramadani; Y. Apriyana; . Haryono
Agromet Vol. 19 No. 1 (2005): June 2005
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Micro sugar industry have some potential problem that needed serious interested, issues of global climate change have affected long drought period with the result that water availability for sugarcane very limited, and problem of land resources in specific location. To anticipate water scarcity in sugarcane plantation need to be optimalization water use through identification ground water potential to know depth and distribution groundwater resources used supplementary irrigation. This paper is attempt in optimalising water resources use through mapping of ground water to know ground water potencyl for developing supplementer irrigation with pumping and deep irrigation to increase sugar cane productivity, rendemen, and production in upland sugarcane PG. Rendeng and of Trangkil. Measurement of ground water characteristic through geolistrict survey using Terameter by detecting electrics into ground by electrodes and take the resistivity value in time dimension, this equipment can identify material underground more than 200 metre depth without passing drilling. Of underground material which have known, hence can be determined resistivity and aquifer thickness. The results of this research showed that in PG. Rendeng and and Trangkil have moderate ground water potency (overburden thickness 6-15 and aquifer thickness 16-25 m) until good (overburden thickness 16-25 and aquifer thickness 26-35 m) but moderate is to be dominant. Ground water potency is distribute in the middle and east of PG. Rendeng and Trangkil.

EVALUASI DAMPAK PERUBAHAN PENGGUNAAN LAHAN TERHADAP VOLUME LIMPASAN STUDI KASUS: DAS CILIWUNG HULU, JAWA BARAT (EVALUATION OF LANDUSE CHANGE IMPACT ON RUN-OFF VOLUME CASE STUDY : CILIWUNG HULU WATERSHED, WEST JAVA) B. D. Dasanto; . Risyanto
Agromet Vol. 20 No. 2 (2006): December 2006
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

The upper Ciliwung watershed is one of the critical catchments areas in Java Island. A major element of this area is the modification of natural land-cover due to human activities. Land use change is driven by the interaction between physical and socio-economic factors. The objective of this paper is to develop a land use change model and to evaluate runoff volume based on land use prediction. The pseudo-R2 or 2 in this model is 51.7% and the calibration between predicted land use and the real is 65.5%. The analysis result of land use change for period 2005-2010 and 2015-2020 show a special change pattern. In the first period, the forest land will decrease by 85%, while resettlements land increase by 144%, so the Curve Number value will increase from 80 to 81. These indicate decreasing capability of the upper Ciliwung to retain rainfall. The impact of this condition will increase runoff volume from 660.000 m3 to be 905.000 m3. In the second period, the forest and resettlements land will increase by 612% and 28%, so the Curve Number will decrease from 80 to be 78. This will decrease runoff volume from 805.000 m3 to be 803.000 m3.

PENDUGAAN DEFISIT AIR TANAMAN JARAK (RICINUS COMMUNIS L) BERDASARKAN MODEL SIMULASI DINAMIKA AIR TANAH(PREDICTION WATER DEFICIT OF CASTOR OIL (RICINUS COMMUNIS L) WITH DYNAMIC SOIL-WATER MODEL SIMULATION) F. Djufri; A. Yanto; . Handoko; Yonny Koesmaryono
Agromet Vol. 19 No. 2 (2005): December 2005
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Construction dynamic model soil – water that describes relationships between crop growth and development and environmental factors (weather and soil) can be further developed to be employed as a decision support tool . The objectives of the research : (1) to know interaction of factor weather , soil, castor oil crop, (2) construction dynamic model soil – water , (3) monitoring water deficit factor at level of water irrigation. The research consisted field observation and construction model. The experimental results were used to determine quantitative relationships to obtain model parameters, calibration, and validation. This research was conducted in field experimental station of Balitpa Sukamandi, and it was arranged in split plot design with three replications. Two variety of castor oil as main plot design were : (1) ASB 81, (2) ASB 60. Three levels of water irrigation as sub plot design were : (1) No water irrigation, (2) ½ ETp, (3) 1 ETp. Field measurements included weather variables, soil, and crop. The t-test does not indicate significant difference between observed and predicted soil water content. The model is valid and reasonably well for predicting soil water content as long as castor growth . The dynamic model soil-water can be employed as a decision support tool in the management of castor oil plantations in Indonesia.

PEWILAYAHAN AGROKLIMAT TANAMAN NILAM (Pogostemon spp.) BERBASIS CURAH HUJAN DI PROVINSI LAMPUNG (AGROCLIMATE ZONING OF PATCHOULY (Pogostemon ssp.) BASED ON RAINFALL IN LAMPUNG PROVINCE) I. G. Darmaputra; Y. Koesmaryono; I. Santoso
Agromet Vol. 20 No. 2 (2006): December 2006
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

The research purposed to determine the patchouly cropping in Lampung Province based on the agroclimate feasibility of area rainfall and to determine the monthly rainfall probability which less than the patchouly requirement. There are four steps on this research such as to determine the seasonal rainfall distribution by Principle Component Analysis, seasonal rainfall zoning by Cluster Analysis, and agroclimate zoning of patchouly by superimpossed annual region rainfall map, regional map of wet month, topography map to patchouly agroclimate requirement, and to determine the monthly rainfall probability which less than the patchouly crop requirement. The result of research shows 2,069,005 ha of Lampung Province area most feasible and feasible to patchouly cropping, which are spread in Lampung Barat Regency (15.7%), Lampung Tengah Regency (15.5%), Way Kanan Regency (14.3%), Tanggamus Regency (14%), Lampung Utara Regency (12.5%), Lampung Timur Regency (10.8%), Tulang Bawang Regency (8.5%), Lampung Selatan Regency (8.2%), Bandar Lampung City (0.4%) and Metro City (0.1%). The results also reveal that the seasonal rainfall in Lampung Province can be grouped in seven types (I-VII), and the most feasible area lay on type I-IV, but for feasible area lay on type I-VI. Related to rainfall probability, at type I there is not occured monthly rainfall ≤ 200 mm with probability ≥ 60%, where as at type II the condition can be occurred 5 months, at type III and IV occurred 4 months, and at type V and VI occurred 7 months.

ANALISIS POLA UNSUR METEOROLOGI DAN KONSENTRASI POLUTAN DI UDARA AMBIEN STUDI KASUS : JAKARTA DAN BANDUNG (ANALYSIS OF PATTERN OF METEOROLOGY VARIABLE AND AMBIENT POLUTANT CONCENTRATION CASE STUDY : BANDUNG AND JAKARTA) A. Turyanti; I. P. Santikayasa
Agromet Vol. 20 No. 2 (2006): December 2006
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Meteorological conditions are the important factors that influence tranformation and tranportation process of the polutant in the atmosphere. The aim of this research is to study correlation between local meteorology condition with ambient polutant concentration. Case study has been done in Jakarta and Bandung. Research method is secondary data analysis by plot meteorology component (radiation, temperature, hummidity and wind velocity) and polutant consentration, to gain fluctuation pattern from both component and than do correlation analysis. Result of the analysis show that the influence of each meteorology component differ to each polutant component and depend on local condition. In Bandung and Jakarta, radiation fluctuation has negative correlation with CO, NO2, Nox and PM10. The most negative correlation in Bandung is wind velocity with CO which has correlation value -0.74, and correlation between humidity and O3 which has value -0.8. While the most positive correlation is correlation between temperature and radiation with O3 which has value 0.7 – 0.8. Humidity has positive correlation with several polutant. In Jakarta, in general, coefisien correlation value both positive and negative correlation less than coefisien correlation in Bandung, except for O3. The influence of amount and kind of emition also contribute to them. The unique matter has been found that meteorology component fluctuation in both Jakarta and Bandung has high correlation positive and negative with O3, up to the value -0.8 to +0.7. The other polutant component has small in both negative and positive cerrelation (±0.5).

DAMPAK VARIABILITAS IKLIM MUSIMAN PADA PRODUKSI PADI SAWAH TADAH HUJAN DI PULAU LOMBOK (IMPACT OF INTERANNUAL CLIMATE VARIABILITY ON RAINFED PADDY PRODUCTION IN LOMBOK ISLAND) I. Yasin; M. Ma'shum
Agromet Vol. 20 No. 2 (2006): December 2006
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Variability of inter-anuual rainfall has great impact on agricultural production. The inter-annual rainfall variability mainly causes cropping and harvest failure in rainfed land due to drought and flood. Although the onset of season is usully known, the characteristic of in coming rainfall is usually not predictable. Thus the understanding of the cause of rainfall variability may lead to establishment of new system to forecast seasonal rainfall characteristics. The aims of this research are to study water availibity for dry direct seeding rice by considering water balance in southern Lombok and understanding the relationship between ENSO phenomena with rain event in Lombok as well using SOI for predicting seasonal rainfall events. The results of this research showed that average rainfall in southern Lombok is 1450 mm with 950 mm the lowest and 2460 the highest. Southern Lombok has three water surplus months (with rainfall >200 mm), and 5 to 6 water deficit months (with less than 100 mm rainfall).. Inter annual rainfall variation is closely correlated to ENSO phenomena where the rainfall tend to be obove normal in La Niña years and below normal in El Niño years. The short term wet months and wide range of rainfall varibility lead to the need to establishment of water storage system and the application of water and cropping management which suitable to rainfall characteristics and local environmental conditions. The use of ENSO and SOI value to forecast seasonal rain events may be suitable and may reduce the risks of cropping system in rainfed agricultural land.

ANALISIS PELUANG DERET HARI KERING PADA TANAMAN PADI TADAH HUJAN DI KABUPATEN KULONPROGO DALAM PERSPEKTIF TOPOSEKUENS (PROBABILITY ANALYSIS OF DRY SPELL ON RAINFED PADDY AT KULON PROGO DISTRICT IN TOPOSEQUENCE PERSPECTIVE) F. Fibrianty; S. Sarjiman
Agromet Vol. 20 No. 2 (2006): December 2006
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Climate anomaly has significant impact on rainfall and its pattern, whereas they were important factor in determining onset of wet and dry season. Changes in rainfall pattern need to antisipate with tailoring planting date for minimize harvest risk. This research purpose to analyse dry spell probability and its relation to drought risk on rainfed paddy at Kulon Progo District in Toposequence Perspective.Kulon Progo District was divided into three sequence, that were Fluvial as catchment area (i.e. Samigaluh); Freatik as conservation area (i.e. Kenteng, Kalibawang and Kokap); and Fluksial as user area (i.e. Gembongan- Sentolo, Sapon-Lendah and Wates). The aimed of this research was to analyze the drought periods and its relation with drought risks on rainfed rice plant at Kulon Progo district in toposequence perspective. The probabilities of 15 day dry spell at Fluvial area were 0,27 – 0,44 on May-September. On Freatik area, the probabilities of 15 day dry spell were 0,21 - 0,43 on April-Oktober at Kenteng, while at Kalibawang and Kokap the probabilities were > 0,2 on May-September. The probabilities at Gembongan-Sapon were> 0,2 on May-October, while at Wates the probabilities on May-September were 0,21-0,32. The distribution of probability show that the probability of 15 day dry spell were > 0,2 at May-October and the driest periods were August-September but with various dry level, that Kenteng and Gembongan-Sapon were the driest area. Based on that analysis, the planting periods should be started on November and the last planting should not over than January, especially at Kenteng, Gembongan and Sapon.

LINKING CLIMATE CHANGE ADAPTATION OPTIONS FOR RICE PRODUCTION AND SUSTAINABLE DEVELOPMENT IN INDONESIA (KETERKAITAN OPSI-OPSI ADAPTASI PERUBAHAN IKLIM UNTUK PRODUKSI BERAS NASIONAL DAN PEMBANGUAN BERKELANJUTAN DI INDONESIA) P. Perdinan; R. Boer; Kiki Kartikasari
Agromet Vol. 22 No. 2 (2008): December 2008
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Climate change is expected to significantly influence Indonesian rice production as this phenomenon will exacerbate extreme climate events such as El Nino and La Nina which have caused serious loss in rice production. This paper is attempted to propose plausible climate change adaptations for rice production by examining the formal documents on climate change studies in Indonesia and rice development strategies and to investigate their linkage with the Sustainable Development in Indonesia. The result shows that climate change adaptations will support Indonesian rice development strategies through options of “change cropping pattern/modified planting season” which has not been addressed by the development strategies. The proposed adaptations which are directed through two major programs for increasing rice production called as Extensification and Intensification, have also already addressed the four pillars of Indonesian sustainable development, namely: pro-job, pro-poor, pro-growth and pro-environment.

EFISIENSI PENGGUNAAN RADIASI SURYA DAN SEBAGAI DASAR DALAM MODEL JARAK PAGAR(RADIATION USE EFFICIENCY AS BASIS THE CROPS MODELING OF JATROPHA) Gusti Rusmayadi; . Handoko; Yonny Koesmaryono; Didiek Hadjar Goenadi
Agromet Vol. 22 No. 2 (2008): December 2008
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Plant growth interpretation in term of accumulated intercepted solar radiation and the radiation use efficiency (RUE) was used to study the growth and analysis of Jatropha (Jatropha curcas L.). A number of crop growth simulation models have been developed using the RUE concept to predict crop growth and yield in various environments. These models generally calculate daily biomass production as the product of the quantity of radiation intercepted and RUE. This research was carried out to quantify the RUE, biomass and leaf area index on Jatropha under rainfall condition, four levels of nitrogen fertilizer (N) and three population densities (P) planted twice. The experiments used a systematic Nelder fan design with 9 spokes and 4 – 5 rings were conducted at SEAMEO-BIOTROP field experiment in 2007. Data from the first experiment were used for parameterization and calibration and the second experiment data for model validation. Values of RUE were determined by nitrogen fertilizer and plant density. Based on parameterization, we found that RUE for prediction above ground biomass accumulation of Jatropha were 0.94 (r=0.83) g MJ-1 to 1.3 (r=0.75) g MJ-1. Validation between model prediction and field experimental data showed that model can simulate crop growth and development of Jatropha.

PENILAIAN RISIKO IKLIM PADA SISTEM PERTANIAN EKOSISTEM LAHAN RAWA PASANG SURUT (STUDI KASUS DI DELTA TELANG I, DELTA TELANG II DAN DELTA AIR SALEH, BANYUASIN, SUMATERA SELATAN) (CLIMATE RISK ASSESMENT ON AGRICULTURAL SYSTEM IN SWAMP AREAS ... . Suciantini; . Impron; Rizaldi Boer
Agromet Vol. 22 No. 2 (2008): December 2008
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

The characteristics of swampland areas are different from agricultural land of Java, mainly in water availability. In swampland ecosystems there are unique environmental conditions. To assess risks of climate, mainly in climate change, we must assess about capacity and adaptation strategy. From treasure of related institution and interview with farmers,its had been known about climate impact on farming systems application, rainfall pattern and water availability. This paper aims to assess risks of climate on farming systems, application of adaptation strategy to reduce risks of climate and probability to provide of planting pattern alternative in the future in swampland areas (tidal marsh) in Delta Telang I, Delta Telang II and Delta Air Saleh, Banyuasin, South Sumatera.

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