bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Impact of slope steepness and land use type on soil properties in Cirandu Sub-Sub Catchment, Citarum Watershed
Authors: Siswanto S Y , Sule M I S 
Published: December 2019

Abstract
The research was conducted to investigate the relationship between topography (slope steepness) and landuse on soil physical properties. This research was conducted at Cirandu sub-cathment, Citarik Catchment Area, Citarik Sub Watershed, Upper Citarum Watershed, West Java. The study was carried out using a physiographic free survey method, which is a survey based on land physiographic appearance, and soil sampling was carried out into transect on the similarity slope without calculating the point of observation range. Soil sampling was carried onto three classes of slope and three land use type The result of the research showed that there are no effect of slope steepness and landuse on organic matter, hydraulic conductivity and erodibility. The highest erodibility value was found on the forest with 8-15% slope.
Infiltration effectiveness of Alfisols under albazia and coconut trees and in barren land in the middle part of Bogowonto Watershed, Central Java – Indonesia
Authors: Sampurno V N , Sartohadi J , Pulungan N A H J 
Published: December 2019

Abstract
Surface runoff is the source of soil erosion, leading to soil resources degradation in the hilly and the mountainous areas. Albazia is a common revegetation trees at the study area as a source of annual income. Coconut is a traditional plantation tree becoming a source of daily income from its sap and/or monthly income from its fruit. This study was based on field observations during 20 rainfall generated runoff. The collected research data were rainfall intensity, stemflow, throughfall, infiltration, and physico-chemical characteristics of the soil. The results show that the effective infiltration under Albazia trees, under coconut trees, and in barren land respectively 11%, 38% and -39% respectively. Physiological characteristics of Albazia and coconut which include canopies, stems, and roots have controled the soil capacity of infiltration. The barren land which is only covered by grass and bush vegetation is becoming the main source of runoff in the study area.
Effect of the conservation plants on runoff, soil erosion, and root characteristics in the volcanic areas
Authors: Saidi A , Adrinal  
Published: December 2019

Abstract
Research on reducing surface runoff and erosion by using vegetation method has been widely carried out. But the using of grasses plants to control erosion and landslide was not yet widely done, especially the effect of plant root parameters on reducing surface runoff and erosion. A research was carried out on volcanic soil in Experimental Station, Agriculture Faculty, Andalas University. This study was carried out from April 2018 to November 2018. It uses a 15 m x 2 m plots that was limited by brick concrete on 3 sides and the other side was used for measuring runoff and soil erosion. This experiment consisted of 4 treatments with 3 replications. The experimental units were arranged to according to a completely randomized design (CRD). Data were analyzed the variance using F test at 5 % level of significance and then continued using the Least Significance difference (LSD 0.05 if F calculated > F table. The treatments were; A = Vetiver + Simple terrace, B = Vetiver + Napier grass, C = vetiver + King grass, D = King grass + Napier grass. Observations were carried out on surface runoff, soil erosion, soil physical properties, soil shear strength, and root characteristics. Root characteristics observations using the Mwango et al (2014) method. Their parameters were root diameter, root density, root length density, root area ratio, and relative soil particles detachment rate. The field experimental results showed that combination of Napier and King grass (D) are better than another treatment to decrease surface flow and soil erosions. Between King grass + Napier grass (D), vetiver + Napier grass (B) and vetiver + King grass (C) treatments were not significantly different, exceptly with Vetiver grass + simple terrace. This statement also contribute by soil strength, and root properties at 0-30 cm depth.
Spatial analysis of hotspot data for tracing the source of annual peat fires in South Sumatera, Indonesia
Authors: Hamzah A S , Darmawan  , Sumawinata B , Suwardi  , Djajakirana G 
Published: December 2019

Abstract
Forest and land fires in Indonesia have become the main national and global concern for the last decade. This disaster can cause enormous losses in the economic, social and environmental sectors because it occurs almost every year. The cause of these fires was always strongly believed to be of human activities (anthropogenic). A definite description of what activities most often cause fire incidences can be approximated by pointing out the initial fires that can be than correlated with kinds of activities that ignited the fires. The initial fires can be traced from hotspot data. Therefore, this study aimed to seek the initial fire locations in South Sumatera where there are activities of both small-scale farmers and big-scale industrial plantations on peatland and the adjacent non-peat areas. Daily hotspot data (MODIS) from 2014 to 2018 with a confidence level of more than 80% of the South Sumatra wetland areas were used in this study. The result showed that the initial hotspots mostly detected on floodplains and coastal plains that are adjacent to the peatland that is called here as transitional land. The local community in these locations generally utilizes the land for rice or seasonal plant cultivation by burning the land (Sonor culture).
Financial analysis of direct application of reactive phosphate rock fertilizer on corn farming on upland acid soils
Authors: Irawan  , Kasno A , Husnain  , Samsun A 
Published: December 2019

Abstract
Indonesia has extensive upland acid soils, which is around 99.6 million hectares spread across Sumatera, Kalimantan and Papua Islands. The use of upland acid soils for food crops is an urgent need because of the government’s self-sufficiency target, including corn. The level of nutrient in upland acid soils is relatively low so it requires adequate input of ameliorant, inorganic and organic fertilizers to produce high corn yield. A demonstration farm of corn based on the direct application of reactive phosphate rock (RPR) fertilizer was carried out in rainy season 2018/2019 by involving three farmer groups as cooperative farmers, with an area of 50 ha in Margosari village, Metrokibang subdistrict, Lampung Timur Regency. This paper presents the results of financial analysis of corn farming at the demonstration farm area. Data was gathered from 52 farmers (43.7% of the cooperative farmers) which randomly selected as survey respondents. The results of the analysis showed that balanced fertilization using RPR as much as 1 t ha−1 as a source of P fertilizer was financially benefited to farmers. The average corn productivity of hybrid varieties reached 14.357 t ha−1 and it gave an R/C ratio of 1.8.
Spatial utilization control for supporting development acceleration: case study in South Tangerang city, Banten Indonesia
Authors: Cahyani D T , Munibah K , Mulyanto B 
Published: December 2019

Abstract
Spatial plan is a guideline for a country’s development containing strategic policies and spatial utilization programs. The high dynamics of space needs for development implementation impacting to the spatial uses change and raising number of spatial unsuitability. South Tangerang city, as an urban area which serves as a capital buffer zone, experiences a fairly high development intensity, that giving a development effect to some areas in economic and ecological ways. The existing land use analyses found that 21,91% of the existing land use are not suitable with the spatial plan, 55,28% suitable, and 22,81% are still in transition. The change of the land uses are dominated by trade and services area and areas which has an access to an infrastructure facilities. This development activity including infrastructure, potentialy raised spatial utilization unsuitablility. This research is about to map the land use gradations and the consistency of spatial utilization related with the development planning in South Tangerang city in order to raise the effectiveness of spatial utilization control. Detailed instrument are needed, so the Government must accelerate the preparation of Detailed Spatial Plan (RDTR).
Selecting land characteristics affecting local flash sweet potato production levels based on production indicator of consumer preference
Authors: Solihin M A , Setiawan A , Nurbaity A , Widiatmaka  
Published: December 2019

Abstract
Rancing sweet potato is one of preferred local flash sweet potatoes in Indonesia. The interesting thing about Rancing is on its sweetness taste that meet on common consumer’s preference. So, production indicator of Rancing should be consider the sweetness levels in addition of yield. The study aimed to selecting land characteristic affecting Rancing production levels based on combination of yield and sweetness indicator. Sampling units were research plot in actual production site in West Java. Sweet potato tuber samples were collected at harvest time, whereas the soil samples were taken by composite soil sample at each sampling unit. Rancing production indicator was measured in total sugar weight (kg ha−1). Total sugar weight was determined by multiplication of weight of yield (t ha−1) and total sugar content (%) of Rancing at harvest time at same sampling units. Selecting land characteristics were affecting Rancing production were determined using stepwise multiple discriminant analysis. Results showed that there were soil and climate properties affecting Rancing production levels. These land characteristics can be considered in determining land use requirements of Rancing.
Effect of toposequence on rice (Oryza sativa l.) by intermittent irigation in Bali
Authors: Arsana I G K D , Kariada I K 
Published: December 2019

Abstract
The research of toposequence effect on rice aims to study effect of toposequence on rice planting season by different way of irrigation in Yeh Ho watersheds Tabanan Bali. This research used some varieties of rice namely Mekongga, Inpari 1 and Inpari 10 Laeya. The result showed that toposequence had significant effect on milled dry paddy (GKG). Upstream toposequence able to produce rice about 6450 kg ha−1, middle was about 6460 kg ha−1 and downstream was about 7260 kg ha−1 by significantly different. Irrigation interval every eight days capable to produce 7400 kg ha−1 of rice which was 17,3% higher than continuously irrigation production about 6280 kg ha−1. Also, irrigation interval every four days can produce 6490 kg ha−1 of rice which was 12,3% higher than continuously irrigation production about 6280 kg ha−1. Varieties of Mekongga produce 6800 kg ha−1 of GKG which was 5% lower than Inpari 10 Laeya varieties, 4,1% lower than Inpari 1 varieties. Then, Inpari 1 produce 7080 kg ha−1 of GKG which was 0,89% lower than Inpari 10 Laeya. Irrigation interval every eight days capable to produce highest of GKG compared to others irrigation interval. It can be conclued that toposequence had significant different on rice production.
Validation of land management information system model (SILAHAN) on plot scale, case study in Citaman, Nagreg, West Java
Authors: Ariani R , Rachman A , Dariah A , Yustika R D , Marwanto S 
Published: December 2019

Abstract
Upland has potential uses for agriculture practices in indonesia. However there are some problems to manage, one of them is many existing upland in sloping areas and high risk to erosion and runoff. Indonesian Soil Research Institute developed a recommendation model for the land management information system (SILAHAN) based on the study of criteria for soil conservation indicators with calculation of erosion hazard index and surface runoff. The aim of this study was to validation SILAHAN prediction models from surface runoff aspects on a plot scale as the basis for formulating recommendations for the most complex land management technology. Validation of the prediction results of surface runoff in SILAHAN model is done by comparing surface runoff results of real measurements in field with the results of predicted by SILAHAN with three simulation. The results of statistical tests with r pearson correlation coefficient is 0,31, 0,31, and 0,32, PBias is -90,6, -86,6 and -83,5, and NSE is -0,76, -0,68, and -0,63. The results of the prediction of plot scale surface runoff in the SILAHAN model were not same as the measurements result on the field observations. it is suggested to determine the correction factors and development capabilities of the SILAHAN model to assess the effectiveness of a land management system in reducing the amount of surface runoff.
Mineralogy and micromorphology of soil from gneissic rock in East Luwu, South Sulawesi
Authors: Ahmad A , Lopulisa C , Imran A M , Baja S 
Published: December 2019

Abstract
Different type of rock, climate, and topography will produce specific mineralogical and micromorphological characteristic in soils. There were still a few research related to the influenced of several types of rocks to soil mineralogy and micromorphology, especially from metamorphic rocks. The objective of this research was to examine the characteristics of mineralogical and micromorphological of soil formed from gneissic rock in East Luwu, South Sulawesi. The observation of soil profiles were carried out in four profiles. The mineralogical analysis was carried out by X-ray diffractometer, and micromorphologogical analysis was carried out by using the thin section. Gneissic rock consisted of quartz-gneiss and muscovite-quartz gneiss. Minerals in the soil had mesomorphous alteration stage with class of alteration of 2nd and 3rd that had been altering in 25-75%. The minerals were quartz, goethite, muscovite, gibbsite, hematite, boehmite, and ilmenite. Alteration mineral formed sesquioxide horizon in soil. The high intensity of weathering of gneissic rock was influenced by the high intensity of rainfall, reached 3389mm/year. Nodules as the weathering product dominated in typic soil type. The c/f related distribution was enaulic, related distribution was porphyric and b-fabrics were granostriated and stippled speckeld. High content of oxide mineral with stippled speckeld b-fabric showed the advanced stage of pedogenesis process from the gneissic rock.
Potential of mineral resources as an alternative raw material for K fertilizer
Authors: Hartatik W , Wibowo H , Anda M 
Published: December 2019

Abstract
Indonesia has potential mineral deposits of leucite, phlogopite, biotite, and trachyte which could be explored as an alternative raw material for K fertilizer. The objective of the study was to evaluate K content of various rocks that were potential to be used as an alternative source of K fertilizer. The study of K nutrient solubility from finely ground eight rock types was done using incubation experiment under laboratory conditions. Treatments included control, heating, alkali fussion, heating followed by humic substance addition, heating followed by manure compost, humic and compost without heating. After incubation for 6 months, solubility of potential K (25% HCl extract) and available K (2% citric acid extract) were determined. The results showed that K2O content of various rocks varied from 1.26 to 8.10% with the highest value of 8.10% shown by leucite-bearing rocks of Situbondo followed by 7.06% for leucite Pati, 6.50% for andesite Jepara, 5% for trachyte-andesite Barru, 4.58% for granite Sijunjung, 3.59% for andesite Lebak, 2.73% for liparite Gayo Luwes and 1.26% for schist and dolomite Sanggau. Alkali fusion treatment of leucite Situbondo and Pati increased K availability by 81 and 49%, respectively compared to a control at first month incubation. Humic substances and manure compost treatment did not have significant differences on potential and available K. The implication of the study is only two rocks (Situbondo and Pati) out of eight rocks are promising and potential to be used as an alternative source of K fertilizer.
Determination of Polycyclic Aromatic Hydrocarbon in biochar
Authors: Kurnia A , Harsanti E S , Sutriadi M T 
Published: December 2019

Abstract
In certain concentration PAHs has hazardous effect to the environment particularly human. PAHs have hazardous effect as carcinogen and in long period persistent in the environment. Incomplete burning of biomass in biochar production process can resulted PAHs. In agriculture, biochar functioned as soil conditioner to increase soil fertility. We have to make sure that production of biochar contains low PAHs. Our department was setting some standard methods as reference methods in Indonesia for determination of PAHs, and involved in environment research, which was very important for Indonesia. Since the most of determination of PAHs used special commercial PAHs column that was expensive, our experiment carried out the determination of PAHs in biochar using HPLC and GC/MS with common column for various analyte of C18 for HPLC and (5%-Phenyl)-methylpolysiloxane for GC/MS. Furthermore in this experiment, we were used diode aray detector and fluoresence detector in HPLC. The result showed that both HPLC and GC/MS can be used to determine PAHs only by using common column. Biochar that we produced contain 16 PAHs compound with concentration range from 0.07 to 9.36 μg/g while mean concentration of USEPA PAHs in reference biochar about 0.034 to 1.75 μg/g. Therefore, some PAHs compound were over the limit of USEPA standar in biochar
Carbon dioxide mitigation with tabat system on peatland
Authors: Nurzakiah S , Nurita  , Subagio H 
Published: December 2019

Abstract
Peatland conservation to maintain the natural condition is the best way to resolve carbon dioxide emission problem due to land use change; and to reduce fire in peatland. However, peatland conservation in extensive agricultural peatland is difficult to execute (or accomplish). Peatland can be productive for agriculture with the appropriate technology. Water management is required to regulate groundwater level which is suitable for plants and maintain soil moisture. Tabat is a water management system carried out with the installation of water-gate in the drainage channels to regulate groundwater level. The purpose of this study was to determine the role of tabat system in mitigating CO2 emissions. This research was conducted by survey method and then field sampling on rubber land use. The research carried out in two experimental units in the peatland; 1) the drainage channel is equipped with the water-gate/Tabat (RST), Tabat size adjusted to the channel dimensions, and 2) there are no water-gate on the drainage channel (RNT). The parameters of CO2 fluxes, groundwater levels, and water content were carried out from January to December 2015. The results showed that the water management of Tabat System reduced CO2 emissions by 23.6% and enable to prevent loss in water-holding ability of fibric peat by 13.9%. This indicates that water management Tabat System enable maintain peat moisture and as a CO2 mitigation.
Chili cultivation on tin mined land at Bangka Island: prospects and constraints
Authors: Subiksa IGM. , Suastika IW. , Sutono  
Published: December 2019

Abstract
Chili (Capsicum sp.) is one of most valuable crop in some part of Indonesia due to high price and profitability compared to another crop. However, growing chili needs high capital and special expertize due its growth requirements. All chili cultivar needs good drainage land and good soil nutrients status for their optimum growth. Meanwhile, tin mined land is very degraded land and the tailing dominated by quartz sand. Poor soil physical properties and poor nutrient status cause this land unsuitable for most crops including chili. However, high demand and high price, promises profitable chili cultivation on such land. Advanced technologies in fertilizer and water management have been assessed at Bukit Kijang Village, Bangka Island and showed very promising results for expansion. Amending soil with mixture of manure and biochar increased water holding capacity and cation exchange capacity and hence, increased yield. Although attained yield of chili was 5.7 t ha−1, which is about 23.7 % from the average of agronomic potential yield, the net profit ranged from IDR 51.8 to 92.9 million per year after taking into account the investment for fertigation installation. The main constraints identified included low water holding capacity due to sandy texture. However, this constraints could be solved by drip irrigation technique and fertigation system. Pest and diseases were another contraints that also contributed significantly to decreased chili yield.
Carbon emission and sequestration on tin mined land: A case study in Bangka Belitung Province
Authors: Haryati U , Dariah A 
Published: December 2019

Abstract
The research objective was to study emission rate and carbon sequestration in extin minimg land, with Bangka Belitung Province as the case site. Emission projections are carried out until 2040 based on historical emissions from 2000-2013. The results showed that in the period 2000 - 2013 there was an expansion of the tin mining area in the province covering an area of 22,642 ha, causing a decrease of 19,507,142 t of soil C stock and 10,056,896 t of plant C stock and emissions (sourced from plants only) of 36,908,808 t CO2 eq. There are two scenarios we propose here to reduce emissions: Scenario 1, avoid the opening of primary forest, primary and secondary swamp forests, and reclaim 80% of the tin mined land area by planting perennial crops such as plantation/estate crops or industrial forest. Scenario 2, equals Scenario 1 plus a reduction in the rate of secondary forest clearing for various uses by 50%. Scenario 1 will potentially able to reduce emissions by 8% and carbon sequestration by 8,000,000 t CO2 eq. and scenario 2 reduced emissions by 26.97% with carbon sequestration 32,500,000 t CO2 eq.
Anticipate of Climate Change Impacts In Rainfed Lowland Rice Through Applying Appropriate Technology
Authors: Wihardjaka A , Harsanti E S , Sutriadi M T 
Published: December 2019

Abstract
Rainfed lowland covers about 2.1 million ha in Indonesia that are generally distributed in Java, Sumatera, Kalimantan, Sulawesi, and Nusa Tenggara. Rainfed lowland ecosystems have great potentially to be more productive agriculture to avert possible food shortage. However, productivity of rainfed lowland rice is low due to low soil fertility, lack of water resources and its infrastructure, high weeds infestation, drought stress, and susceptible to climate change. The higher rainfed lowland rice yields can be attained by implementing appropriate crop and soil management technique. Incorporating 5 ton cattle manure per ha into soil significantly increased grain yield of DSR, also improve soil tillage and supply nutrients required by rice plants. The application of composted organic matter, slow release materials, and direct seeded system could reduce greenhouse gas emissions, and water harvesting could be used as adaptation of climate change. During the TPR and the upland crops, the crops often suffer from severe drought, resulting in drastic yield reduction. One of the alternatives to solve drought stress is to collect excess water during the water surplus rainy season in on-farm reservoirs (OFR) and use the water for the dry season crops.