Joko Winarno

Pemetaan Tingkat Bahaya Erosi Lahan Kering di Kecamatan Jatipuro Kabupaten Karanganyar dengan Sistem Informasi Geografi (SIG)

Title : The Degree of Erosion Hazard Mapping in Dry Land at Jatipuro Sub District of Karanganyar with Geographic Information System (GIS). This research had been conducted at Jatipuro, Sub District of Karanganyar from July until September, 2007. The aims of this research are to know degree of erosion danger and to map that degree of erosion danger. This research was descriptive-explorative by field’s survey and laboratory analysis. Soil sampling technique using purposive sampling method. Site sampling determined with land mapping unit. Analysis of erosion level using USLE method, even though to know degree of erosion dangerous used the table of relation soil depth with erosion level. To make the map degree of erosion dangerous with Arc view GIS 3.3 software. The result of this research conclude that Jatipuro, Sub District of Karanganyar can be classified into 4 erosion dangerous class, with position and width area such that very light in 6th land mapping unit with width area 8.53 ha or 1.17% from total wide of research area. Light, in 1st, 4th, 7th, 12tnd and 16th land mapping units with width area 245.36 ha or 33.72% from total wide of research area. Middle class, in 2nd, 8th, 9th, 10th, 14th, 15th, 17th and 18th land mapping units with width area 181.59 ha or 24.95% from total wide area. Heavy class, in 3rd, 5th, 11th, 13th, 19th, 20th, 21st and 22nd land mapping units with width area 292.18 ha or 40.15% from total wide area. The management of conservation in the land with degree of erosion danger very light until light is low tillage applications, which this purpose is to create soil condition that supported growth of root, but also must be understood the result of tillage, which can be broken soil structures. For the lands with degree of erosion danger middle until heavy, the better conservation is needed. These lands needed terrace’s repairing, there are making bench terrace with middle construction for the middle class and more better terrace for the heavy one. For the best result to minimalist erosion level in this location, in terrace’s making also needed vegetative conservation, there is strip grass to strength the terrace, and also mulching. Keywords: degree of erosion hazard, dry land, GIS

Kajian Pengelolaan Lahan Berdasarkan Tingkat Bahaya Erosi dan Pola Konservasi Tanah dan Air di Desa Ngadipiro Kecamatan Nguntoronadi, Kabupaten Wonogiri

Title : Land Management Study Based on The Degree of Erosion Hazard and Water and Soil Conservation Pattern in Ngadipiro, Nguntoronadi, Wonogiri. This research is aimed to identify the land management which has been done in Ngadipiro in order to overcome the erosion problem, to know and to analyze the class of erosion hazard, to get a soil and water conservation technique alternative which are appropriate to the this surrounding. This research is phenomenological qualitative descriptive research where the variable approach is done by field survey. The field unit map is got by pilling up on one another the map of the field use, soil depth and the declivity of the slope. The sample is taken by purposive sampling technique. Data and information about field management is got by analyzing directly to the field and by interviewing the informant key. Data analysis of the erosion prediction erosion hazard degree is done by using the formula of USLE. The result of the research shows that the erosion danger degree can be classified in to 5 class, they are: very light (SPL 4), light (SPL 3), medium (SPL 5), heavy (SPL 2, 6, 8, and 10), very heavy (SPL 1, 7, 9, 11, and 12), erosion that happenes in the field research (190,08 ton/ha/year/land units) has already been dangerous for the soil productivity preservation because it is already in the limit which is allowed (16,05 ton/ha/year/land units). The recommended soil and water conservations are: a) mechanical water and soil conservation: making the construction bench terrace in SPL 1, 5, 6, 7, 8, 9, 10, and 12, making rorak in SPL 2, 3, 4, 6, 7, 10, and 12, b) vegetative soil and water conservation technique: application agroforestry system by path planting in SPL 6, 7, 10, and 12, the use of soil covering plant in every SPL, for most in SPL 11, c) fertilizing as means to improve ingredients organic matter of land in every SPL. Keywords: Erosion hazard degree, land management, soil and water conservation

Evaluasi Kesesuaian “Beberapa Jenis Tanaman” dalam Sistem Wanatani di Wilayah Desa Ngadipiro Kecamatan Nguntoronadi Kabupaten Wonogiri

Title : Evaluation “Appropriatness of Some Kinds of plant” in The System of Agroforestry in The Area Ngadipiro, Nguntoronadi, Wonogiri. The research was conducted in July 2008 until October 2008, in Ngadipiro, Nguntoronadi, Wonogiri. The research is aimed to evaluated the appropriateness of the plant teak, cashew fruit, melinjo, ground nut and grass the setaria as a part in the agroforestry system in Ngadipiro, Nguntoronadi, Wonogiri and to give some kind of agroforestry planting pattern model among teak, cashew fruit, melinjo, ground nut and grass the setaria in Ngadipiro, Nguntoronadi, Wonogiri. The research is fenomological qualitative description research it means that the research takes the data from the field which is supported by quantitative analysis in laboratory. Set of analysis in the research is set of field map and the soil sample taking technique is purposive sampling method. While, to know the field appropriateness class, the research compares the quality and the field characteristic with the plant growing condition from PPT Bogor 2003. The planting pattern model is based or plant functions and according to planting pattern model proposal from PPLH 2008. To know assess the egibility of is effort farmer the researcher does the B/C ratio analysis and studies plant use value. The result of the research shows that the appropriateness of teak, cashew fruit, melinjo, ground nut and grass the setaria in Ngadipiro is around S3 to N (marginal appropriate to inappropriate). There are three planting pattern model which can be used to lessening level of erosion danger in Ngadipiro. They are Model A (The mix of teak, cashew fruit, ground nut and grass the setaria), Model B (The mix of teak, melinjo, ground nut and grass the setaria) and Model C (The mix of teak cashew fruit, melinjo, ground nut and grass the setaria) While from the B/C ratio analysis and assess the egibility of is effort farmer which based on the use of the plant shows that of teak, cashew fruit, melinjo, ground nut and grass the setaria is appropriate to be tried and to be developed in the research field in Ngadipiro. Keywords: agroforestry, plant approprianteness, planting pattern

Efek Perimbangan Pupuk Organik dan Pupuk Anorganik terhadap Sifat Kimia Tanah Andisol Tawangmangu dan Hasil Tanaman Wortel (Daucus carota L.)

Title : Effects of Balance Organic and Inorganic Fertilizer on the Andisols Soil Chemistry at Tawangmangu to Yield of Carrot ( Daucus carota L.). This research was carried out from August 2008 to February 2009. The purpose of this research were to know the effect of litter quality of Gliricidia maculata and Salacca edulis to inhibition of nitrification and efficiency N benefit in Alfisols. This research were conducted in Blumbang, Sub district Tawangmangu, Karanganyar Regency. The aim of this research to know the effect of balance organic fertilizer and inorganic fertilizer to Andisols soil chemistry at Tawangmangu. This research was experimental research which is used RCBD (Randomized Complete Block Design) with single factor: trial pattern P1 (0% organic fertilizer + 0% inorganic fertilizer), P2 (50% inorganic fertilizer), P3 (100% inorganic fertilizer), P4 (50% organic fertilizer), P5 (50% organic fertilizer + 50% inorganic fertilizer), P6 (50% organic fertilizer + 100% inorganic fertilizer), P7 (100% organic fertilizer), P8 (100% organic fertilizer + 50% inorganic fertilizer), P9 (100% organic fertilizer + 100% inorganic fertilizer). Statistical analysis to test about treatment influence used F-test and Kruskal-wallis test, for comparing inter-treatment used Duncan Multiple Range Test (DMRT) and Mood Median, for finding out of the relation inter-variable it is used correlation test. The result of the research shows that the balance of organic fertilizer and inorganic fertilizer give significant effect to increase total N soil, available N soil, Cation Exchange Capacity (CEC), and pH H2O, but it has not significant effect to total P soil, available P soil, total K soil, available K soil, pH NaF, Base Saturation (BS), and Organic Matter. The Highest total N soil was 0,56% with increased percentage 38.8% from control and CEC was 28.08 me%, increased 4.87 me% from control in balanced 100% organic fertilizer and 100% inorganic fertilizer, affected to yield of carrot was 138.5 g increased 27.3 g (24.5%) from control. Keywords: Organic fertilizer, Inorganic Fertilizer, Andisols, Soil Chemistry, Carrot

KAJIAN KESESUAIAN DOLINE UNTUK BEBERAPA TANAMAN SEMUSIM DI DAERAH KARST GUNUNGSEWU DENGAN PENDEKATAN GEOMORFOLOGI (Studi kasus di kecamatan Ponjong dan Rongkop, Gunung Kidul, Yogyakata)

The observation has a goal to obtain the answer on land problem at Ponjong and Rongkop Districts which lie on Gunungsewu area based on geomorphology approach. The case which is being observed is it low of seasonal agriculture result in that area has a relation to the land. As we know that the area (gunungsewu karst topography) has specifi cation for doline and connical hills. The observation is done by using geomorphology survey approach which emphasizes to some aspects: land form, soils, geomorphology process, interview and bibliography. Population in the observation is karst topography and karst farmers and for the sample are doline and karst farmers (land owners) that have been choosen based on purposive. And for the land sample was appointed based on geomorpho-doline character observation. In analyzing the doliize used qualitative and quantitative methods by matching between land quality and seasonal plants growth requirenments (gogo ewe, corn, peanut and soya bean). The observation result was known that : (1) doline has marginal land for the seasonal plants (gogo rice, corn, peanut and soya bean) with main limit factor is lack ofphosphor, (2) karst farmer cultivate and fertilize still traditional ways only in soils crack depth (x < 25 cm) and was done in fourth season (18th September- 12th October) so in fifth season (13th October - 8th November) gogo rice, peanut and soya bean seeds begin growing, (3) the best plant pattern is tumpangsari but in making the pattern of plant has to be tried by seeing the doline contour to the center of doline.