Universitas Sebelas Maret Surakarta, Fakultas Pertanian UNS: Journal Systems
Not a member yet
730 research outputs found
Sort by
AGROPOLITAN AREA DEVELOPMENT IN SUPPORTING ENVIRONMENTAL CONSERVATION FUNCTION IN BOYOLALI DISTRICK, CENTRAL JAVA, INDONESIA
Get PDFBoyolali which is an agropolitan district in Indonesia has been initiated since 2003. The main objective of agropolitan development is to support the development of the region to support agriculture and economy. Taken in the implementation of programs and policies of government activity that began to develop in the field of agribusiness, which is then applied by farmers and agribusiness. With the implementation of various programs and activities in the development of the possible development of the region Agropolitan Agropolitan causes various positive and negative impacts on the environment. Agropolitan principle one of which is the development of sustainable agriculture implemented, no negative impact on the environment, and even provides support for environmental protection. Agropolitan development that takes into account the environmental functions to support reforestation in the area of Mount Merapi and Merbabu to reduce the impact of global climate changeThe purpose of this study are (1) to determine the implementation of the development in the area Agropolitan Boyolali. (2) to determine the factors that support and hinder the development of agropolitan in support of environment conservation in Boyolali. (3) to find the solution that has been pursued in addressing the factors that hinder the development of agropolitan in support of environment conservation in Boyolali.The research method used was a descriptive study (descriptive research) and exploratory. The results stand out from this study is that the development agropolitan supporting environment conservation in Boyolali still weak and threatened. However, existing solutions from the government and society in the region to confront agropolitan threats
SLOW PYROLYSIS OF SELECTED AGRICULTURAL WASTES: ANALYSIS OF THERMAL DEGRADATION BEHAVIOR
Get PDFThe use of fossil fuels produces carbon dioxide (CO2). Carbon dioxide is one of the greenhouse gasses that contributes to global climate change. Due to this issue, there is increasing the requirement for the use of renewable materials and development of the additional sustainable process. Agricultural waste that has the property of fast growth, is an alternative renewable energy. In this work the slow pyrolysis of selected agricultural wastes mixture (cassava peel-rice straw, rice straw-rice husk, and cassava peel-rice husk) were studied to determine thermal degradation behavior of the biomass. The process was conducted in a fixed bed reactor at temperatures 325 °C, at 10 °C/min heating rate and at 10 min holding time. Results revealed that the moisture content of agricultural wastes were 4.40 % (cassava peel-rice husk), 5.48 % (rice straw-rice husk) and 8.12 % (cassava peel-rice straw). The devolatilization process of the biomass was taken place in the temperature range from 189 oC to 325 oC. The volatile matter of each sample was 61.5% for cassava peel-rice husk, 58.5 % for rice straw-rice husk and 52.5 % for cassava peel-rice straw
CRUCIAL LIMIT POINTS IN DEFICIT IRRIGATION
Get PDFTraditional irrigation which focuses on yield only without considering the availability of water is not an effective method where there is water scarcity. Deficit irrigation (DI) is an alternative irrigation method which saves water without significantly affecting yield. It has been widely used in various crops. There are range limits in every crop in terms of water limit endurance. Through simulation from various research on DI, this limit can be analyzed and the results made available for others who want to apply DI. The simulation was conducted to analyze the limit point in DI treatment
MANAGEMENT OF LEGUME AS LAND COVER CROP AND EMPTY BUNCH FOR THE NITROGEN EFFICIENCY IN INCEPTISOLS AT OIL-PALM PLANTATION
Get PDFThe research aimed to know the kind of legume cover crop which more suitable to be cultivated especially in area of Natar, South Lampung and to know the efficiency of N supply. It used a single Completely Randomized Block Design (CRBD) consisted of 4 treatments (several kinds of debris), covering: kacang benguk (Mucuna cochinchinensis), kacang ruji (Pueraria javanica), and oil-palm empty bunch compared to one which no debris added (control). Data analyzed by regression, F test (α 5%; or Kruskal-Wallis), DMR test (α 5%; or Mood Median) and correlation test. Result showed that Pueraria javanica (kacang ruji) was more suitable to be cultivated. Regression showed that management of empty bunch tend to enhance the ratio of NH4+/N-mineral as indicator of N supply efficiency, while the management of Pueraria javanica tend to decrease the ratio of NH4+/N-mineral. The degradation of soil NO3- concentration in the treatment of empty bunch was followed by the degradation of soil nitrification potential and the enhancement of heterotrofic bacteria. The enhancement of soil nitrification potential in the Pueraria javanica and Mucuna cochinchinensis management was followed by the degradation of soil pH
VARIABILITY OF GROUND WATER TABLE AND SOME SOIL CHEMICAL CARACHTERISTIC ON TERTIARY BLOCK OF TIDAL LOWLAND AGRICULTURE SOUTH SUMATERA INDONESIA
Get PDFAgriculture and irrigation policies in the tidal wetlands are often too general, thus at the level of farm units they are often inaccurate in term of quality and quantity. The research purpose was to analyze the groundwater levels and to determine the effect of groundwater levels in relation to some soil chemical characters in tidal wetlands P17-5S Mulyasari village Delta Telang II Banyuasin. Indicators of potential land can be analyzed from parameters of variability of soil acidity, Al and Fe content, organic matter and phosphorus and nitrogen status of the soil. Managed limited area was the smallest unit of water management (tertiary plots). The decision was taken based on the dominant values of the hydro-physical and chemical characters. Input criteria design involved the nature of the soil, land use, and hydrology. The field study and analysis showed dominance in soil physical variability. Around 50% of hydraulic conductivity was classified rapid soil with soil acidity is relatively high, moderate nitrogen, low phosphorus, and moderate potassium. Based on these conditions, cropping pattern applied was rice-corn, rice-water melon, soil fertility can be improved through fertilization of N and P; increasing water gate in the tertiary plots, and the water management aimed to controlled drainag
IMPACT OF EL NINO PHENOMENON ON PADDY FIELD AT SERAM ISLAND (CASE STUDY: EL NINO 2015-2016)
Get PDFOne of the global climate phenomenon's which have great influence on Indonesia region, especially eastern Indonesia, both in the atmosphere and on the sea is ENSO where the circulation contained a phenomenon which we called El Nino. El Nino is a phenomenon of the warm column at western Pacific move to central also eastern Pacific region so that the sea surface temperature become warmer than normal values while in the western part of Pacific is cooler than the normal values. This condition characterized by the weakening of trade winds which indicate decreasing moisture supply from the central and eastern Pacific to the western Pacific region. So naturally with the cooling of western pacific sea surface temperature (Indonesia), reduced evaporation and a minimal supply of water vapor from central and eastern Pacific region hence the rain clouds growth process on Indonesian territory become inactive and tend to diminish as the strengthening intensity of the occurred El Nino. Global warming influenced on these incidents is that faster energy collected in the warm column. By mid-2015 until the beginning of 2016, Indonesia suffered the El Nino phenomena which are very significant to the agricultural sector, especially in Seram Island inside Maluku region. This condition causes the paddy field on Seram island areas affected by drought and crop failure. Based on calculations using land water balance, seen the periods of groundwater deficiencies took place in the late period of 2015 until early 2016. Therefore farmers must understand the science knowledge and clear information about El Nino phenomenon to do adaptation and mitigation as well as pattern also the determination of early season crops adapts to the climatological conditions that will happen.