Pengaruh Pemberian Kombinasi Jenis dan Dosis Pupuk Kandang terhadap pH, N-Total, Serapan-N, serta Hasil Tanaman Pakchoi (Brassica chinensis L.) pada Fluventic Eutrudepts

ABSTRACTThe effect of the combination types and dosages of manure on soil reaction, N-total, N-uptake, and yield of pakchoi (Brassica chinensis L.) on fluventics eutrudeptsThis research was conducted to determine the effect of the combination types and dosages of manure on soil reaction, N-total, N-uptake, and yield of pakchoi (Brassica chinensis L.) on Fluventics Eutrudepts. The study was conducted from April to Agustus 2010 in the research station Greenhouse Faculty of Agriculture, Universitas Padjadjaran, Jatinangor Sumedang, West Java, elevated at 700 meters above sea level. The experimental design used was Randomized Block Design (RBD) with eleven treatments and three replications, consisted of without fertilizer (control); one dose of inorganic fertilizer and chicken manure 25 g/polybag; 0.75 dose of inorganic fertilizer and chicken manure 37.5 g/polybag; 0.5 dose of inorganic fertilizer and chicken manure 50 g/polybag; 0.25 dose of inorganic fertilizer and chicken manure 62.5 g/polybag; no inorganic fertilizer and chicken manure 75 g/polybag; one dose of inorganic fertilizer and sheep manure 25 g/polybag; 0.75 dose of inorganic fertilizer and sheep manure 37.5 g/polybag; 0.5 dose of inorganic fertilizer and sheep manure 50 g/polybag; 0.25 dose of inorganic fertilizer and sheep manure 62.5 g/polybag; no inorganic fertilizer and sheep manure 75 g/polybag. The results showed that significant effects of soil reaction, N-total, N-uptake, and yield of pakchoi from combination of types and dosages of manure. Treatment of 0.25 dose of inorganic fertilizer and chicken manure 62.5 g/polybag increased yields of pakchoi became 76.77 g.Keywords: Manure combination, Pakchoi, Fluventics EutrudeptsABSTRAKPercobaan ini dilakukan untuk mengetahui pengaruh pemberian kombinasi jenis dan dosis pupuk kandang terhadap pH tanah, N-total, serapan-N, dan hasil tanaman pakchoi (Brassica chinensis L.)pada Fluventics Eutrudepts. Percobaan ini dilaksanakan pada bulan April sampai dengan Agustus 2010 di Rumah kaca kebun Percobaan Fakultas Pertanian Universitas Padjadjaran, Jatinangor, Kabupaten Sumedang, Jawa Barat, dengan ketinggian tempat 700 meter di atas permukaan laut. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok (RAK) faktor tunggal dengan sebelas perlakuan dan tiga ulangan, yaitu yang terdiri dari tanpa pupuk (Kontrol); 1 dosis pupuk anorganik dan Pupuk kandang ayam 25 g/polibeg; 0,75 dosis pupuk anorganik dan Pupuk kandang ayam 37,5 g/polibeg; 0,5 dosis pupuk anorganik dan Pupuk kandang ayam 50 g/polibeg; 0,25 dosis pupuk anorganik dan Pupuk kandang ayam 62,5 g/polibeg; tanpa pupuk anorganik dan pupuk kandang ayam 75 g/polibeg; 1 dosis pupuk anorganik dan pupuk kandang domba 25 g/polibeg; 0,75 dosis pupuk anorganik dan Pupuk kandang domba 37,5 g/polibeg; 0,5 dosis pupuk anorganik dan pupuk kandang domba 50 g/polibeg; 0,25 dosis pupuk anorganik dan pupuk kandang domba 62,5 g/polibeg; dan tanpa pupuk anorganik dan pupuk kandang domba 75 g/polibeg. Hasil penelitian menunjukkan terdapat pengaruh terhadap pH, N-total, serapan N, dan hasil tanaman anorganik dan pupuk kandang ayam 62,5 g/polibeg dapat meningkatkan hasil tanaman pakchoi menjadi 76,77 g.Kata Kunci: Kombinasi pupuk kandang, pakchoi, Fluventics Eutrudept

Land Use Identification and Spatial Pattern Suitability Analysis using 2020 Landsat 8 OLI Imagery: Case Study: Cikeruh, Citarik, and Cirasea Sub-watersheds

Sub-DAS Cikeruh, Citarik, dan Cirasea merupakan salah satu bagian DAS Citarum yang masuk ke dalam 15 DAS prioritas pemulihan lahan kritis. Salah satu penyebab terjadinya kekritisan lahan adalah pemanfaatan lahan yang tidak sesuai dengan kapabilitas lahan ataupun arahan pola ruang. Tujuan dari penelitian ini adalah untuk mengetahui jenis penggunaan lahan di Wilayah Sub-DAS Cikeruh, Citarik, dan Cirasea pada tahun 2020 serta mengevaluasi kesesuaian penggunaan lahan terhadap Pola Ruang RTRWP Jawa Barat periode 2009-2029. Penelitian ini dilakukan melalui pendekatan analisis kuantitatif deskriptif melalui interpretasi citra satelit Landsat 8 OLI metode supervised classification dengan algoritma maximum likelihood dan analisis kesesuaian menggunakan metode overlay (union) antara data penggunaan lahan yang dihasilkan terhadap Pola Ruang RTRWP Jawa Barat. Hasil dari proses interpretasi citra Landsat 8 OLI teridentifikasi 5 jenis penggunaan lahan dengan luas tertinggi, yaitu: Pertanian lahan kering, hutan, lahan terbangun, sawah, dan lahan terbuka dengan luas masing-masing 35,696.60 Ha (41.78 %), 14,819.90 Ha (17.34%), 12,959.50 Ha (15.17%), 9,112.95 Ha (10.67%), 5,862.92 (6.86%). Tingkat akurasi dari hasil klasifikasi tersebut memiliki nilai overall accuracy 91.25% dan indeks kappa mencapai 0.90. Berdasarkan hasil analisis kesesuaian penggunaan lahan tahun 2020 terhadap Rencana Tata Ruang Wilayah menunjukkan bahwa 40,997.18 Ha (47.98%) sesuai, 17,172.46 Ha (20.10%) belum sesuai, dan 27,276.99 Ha (31.92%) tidak sesuai.Cikeruh, Citarik, and Cirasea sub-watersheds are part of the Citarum watershed which has been included in the 15 priority watersheds for critical land restoration. One of the causes of land criticality is land uses that is not in accordance with land capabilities or spatial pattern directions. The purpose of this study was to identify the types of land use in Cikeruh, Citarik, and Cirasea Sub-watersheds in 2020 and to evaluate the suitability of land use based on the spatial pattern of the West Java Regional Spatial Plans period of 2009-2029. This research was conducted through a descriptive-quantitative analysis approach through interpretation of Landsat 8 OLI satellite imagery using supervised classification method and maximum likelihood algorithm. Suitability analysis was conducted using the overlay (union) method between the resulted land use data and the spatial pattern of the West Java Regional Spatial Plans. The results of the Landsat 8 OLI image interpretation identified 5 land uses with the highest area, showed: dry land agriculture, forest, built-up land, rice field, and bare land covered 35,696.60 ha (41.78%),  14,819.90 ha (17.34%), 12,959.50 ha (15.17 %), 9,112.95 ha (10.67%), 5,862.92 (6.86%) respectively. The accuracy level of the classification showed an overall accuracy value of 91.25% and a kappa index reached 0.90. Based on the results of the 2020 land use analysis of the Regional Spatial Plan, it showed that 40,997.18 Ha (47.98%) was suitable, 17,172.46 Ha (20.10%) was not suitable yet, and 2,276.99 Ha (31.92%) ) was not suitable

APLIKASI PUPUK SI ORGANIK DENGAN PUPUK N,P,K DALAM MENINGKATKAN P DAN SI TANAH PADA INCEPTISOL JATINANAGOR TERHADAP RESPON TANAMAN HANJELI (Coix lacryma Jobi L.)

The objective of this research was to determine the effect of combinations of N, P, K and organic silica fertilizers In Soil P and Si and growth Of Job’s Tears (Coix Lacryma Jobi L.). This research began on May 2017 to October 2017. This research has been done in experimental of Faculty Agricultural, Padjadjaran University Jatinangor. The experiment was in Randomized Block Design (RCBD) consisting of ten treatments with three replications; (A) Control, (B) NPK standard, (C) NPK + ¼ Silica Emulsion, (D) NPK + ½ Silica Emulsion, (E) NPK + ¾ Silica Emulsion, (F) NPK + 1 Emulsion of Ash Silica , (G) NPK + ¼ Nano Colloidal Silica, (H) NPK + ½ Nano Colloidal Silica, (I) NPK + ¾ Nano Colloidal Silica, (J) NPK + 1 Nano Colloidal Silica.  The results showed that there was effect of Si fertilizer on soil P and plant growth. Treatment (J) NPK + 1 Colloidal Nano Silica gives Hanjeli the highest yield 5 MST, 7 MST, 9 MST and 11 MST with plant height 3.58 cm, 10.58 cm, 17.17 cm and 18.00 c

Pengenalan Rumput Mulato sebagai Potensi Sumber Hijauan Sapi Perah di Kelompok Peternak Tunas Mekar, KSU Tandangsari, Sumedang

The Tunas Mekar Farmer Group (TMFG) is a group of farmers belong to dairy farming cooperation (KSU) Tandangsari with the commodity of Friesian Holstein (FH) dairy cattle whose business objectives are to produce cow's milk and breeding of dairy cows. One of the problems that may have caused the low milk production was the result of the low quality and availability of the forage provided by the KPTM members. It is necessary to look for forage alternatives that have advantages in biomass and protein and fiber content, in the hope that it can help meet the nutritional needs of livestock. One of the forages that has advantages in protein and fiber content is mulato grass (Brachiaria hybrid cv. Mulato) which is reported to have the ability to live in a good dry season, easy to breed through tillers, and quite high palatability by ruminants. This community service is carried out to introduce and disseminate the potential benefits of mulato grass as a potential forage source for dairy cows. Community service activities are carried out with the exploratory stage, then the extension stage, and followed by the mentoring stage using an online platform (Whatsapp group). Community service activities regarding the potential of mulato grass as a forage for dairy cows were successfully implemented. With the enthusiasm of extension participants, extension activities can increase the insight of farmers participating in the extension, reflected in the success of farmers in planting and cultivating mulato grass.The Tunas Mekar Farmer Group (TMFG) is a group of farmers belong to dairy farming cooperation (KSU) Tandangsari with the commodity of Friesian Holstein (FH) dairy cattle whose business objectives are to produce cow's milk and breeding of dairy cows. One of the problems that may have caused the low milk production was the result of the low quality and availability of the forage provided by the KPTM members. It is necessary to look for forage alternatives that have advantages in biomass and protein and fiber content, in the hope that it can help meet the nutritional needs of livestock. One of the forages that has advantages in protein and fiber content is mulato grass (Brachiaria hybrid cv. Mulato) which is reported to have the ability to live in a good dry season, easy to breed through tillers, and quite high palatability by ruminants. This community service is carried out to introduce and disseminate the potential benefits of mulato grass as a potential forage source for dairy cows. Community service activities are carried out with the exploratory stage, then the extension stage, and followed by the mentoring stage using an online platform (Whatsapp group). Community service activities regarding the potential of mulato grass as a forage for dairy cows were successfully implemented. With the enthusiasm of extension participants, extension activities can increase the insight of farmers participating in the extension, reflected in the success of farmers in planting and cultivating mulato grass

Land Use Identification and Spatial Pattern Suitability Analysis using 2020 Landsat 8 OLI Imagery: Case Study: Cikeruh, Citarik, and Cirasea Sub-watersheds

Sub-DAS Cikeruh, Citarik, dan Cirasea merupakan salah satu bagian DAS Citarum yang masuk ke dalam 15 DAS prioritas pemulihan lahan kritis. Salah satu penyebab terjadinya kekritisan lahan adalah pemanfaatan lahan yang tidak sesuai dengan kapabilitas lahan ataupun arahan pola ruang. Tujuan dari penelitian ini adalah untuk mengetahui jenis penggunaan lahan di Wilayah Sub-DAS Cikeruh, Citarik, dan Cirasea pada tahun 2020 serta mengevaluasi kesesuaian penggunaan lahan terhadap Pola Ruang RTRWP Jawa Barat periode 2009-2029. Penelitian ini dilakukan melalui pendekatan analisis kuantitatif deskriptif melalui interpretasi citra satelit Landsat 8 OLI metode supervised classification dengan algoritma maximum likelihood dan analisis kesesuaian menggunakan metode overlay (union) antara data penggunaan lahan yang dihasilkan terhadap Pola Ruang RTRWP Jawa Barat. Hasil dari proses interpretasi citra Landsat 8 OLI teridentifikasi 5 jenis penggunaan lahan dengan luas tertinggi, yaitu: Pertanian lahan kering, hutan, lahan terbangun, sawah, dan lahan terbuka dengan luas masing-masing 35,696.60 Ha (41.78 %), 14,819.90 Ha (17.34%), 12,959.50 Ha (15.17%), 9,112.95 Ha (10.67%), 5,862.92 (6.86%). Tingkat akurasi dari hasil klasifikasi tersebut memiliki nilai overall accuracy 91.25% dan indeks kappa mencapai 0.90. Berdasarkan hasil analisis kesesuaian penggunaan lahan tahun 2020 terhadap Rencana Tata Ruang Wilayah menunjukkan bahwa 40,997.18 Ha (47.98%) sesuai, 17,172.46 Ha (20.10%) belum sesuai, dan 27,276.99 Ha (31.92%) tidak sesuai.Cikeruh, Citarik, and Cirasea sub-watersheds are part of the Citarum watershed which has been included in the 15 priority watersheds for critical land restoration. One of the causes of land criticality is land uses that is not in accordance with land capabilities or spatial pattern directions. The purpose of this study was to identify the types of land use in Cikeruh, Citarik, and Cirasea Sub-watersheds in 2020 and to evaluate the suitability of land use based on the spatial pattern of the West Java Regional Spatial Plans period of 2009-2029. This research was conducted through a descriptive-quantitative analysis approach through interpretation of Landsat 8 OLI satellite imagery using supervised classification method and maximum likelihood algorithm. Suitability analysis was conducted using the overlay (union) method between the resulted land use data and the spatial pattern of the West Java Regional Spatial Plans. The results of the Landsat 8 OLI image interpretation identified 5 land uses with the highest area, showed: dry land agriculture, forest, built-up land, rice field, and bare land covered 35,696.60 ha (41.78%),  14,819.90 ha (17.34%), 12,959.50 ha (15.17 %), 9,112.95 ha (10.67%), 5,862.92 (6.86%) respectively. The accuracy level of the classification showed an overall accuracy value of 91.25% and a kappa index reached 0.90. Based on the results of the 2020 land use analysis of the Regional Spatial Plan, it showed that 40,997.18 Ha (47.98%) was suitable, 17,172.46 Ha (20.10%) was not suitable yet, and 2,276.99 Ha (31.92%) ) was not suitable

Effect of nanoparticle of volcanic ash and rock phosphate on some soil chemical properties of variable charge Andisols, Indonesia

Andisols is a variable charge soil where fertilizations to the soil do not give the same result as that to the soils with permanent charges. Therefore, amelioration is needed to improve the soil chemical properties. The purpose of this research was to find out the influence of nanoparticles of volcanic ash and rock phosphate as ameliorants on pHw, pH0, P-retention and available P on variable charge Andisols, Indonesia. This research used a complete randomized experimental design on factorial pattern with two factors. The first factor was nanoparticle of volcanic ash consisting of four levels i.e. 0, 2.5, 5.0 and 7.5% of soil weight (w/w). The second factor was nanoparticle rock phosphate, also consisting of 4 levels like nanoparticle of volcanic ash. The treatments were repeated 3 times. The results showed that there was an interaction between nanoparticle of volcanic ash and rock phosphate in increasing pHw to 5.37 and increasing availbale P to 330 mg kg-1. However, there was no interaction in pH0 and P-retention. Nanoparticle of volcanic ash and rock phosphate was found effective to improve some soil chemical properties after one month of incubation

Desain Vegetasi Bernilai Konservasi Dan Ekonomi Pada Kawasan Penyangga Sistem Tata Air DAS Bolango (Designing of Vegetation Which Conservation and Economic Values in the Buffer Area of Water System at the Bolango Watershed)

Perencanaan pembangunan arboretum di DAS Bolango dengan konsep konservasi dan ekonomi perlu dilakukan karena DAS ini memiliki peranan yang penting dalam kehidupan masyarakat sekitar. Tujuan penelitian ini adalah memberikan rekomendasi tentang komposisi dan struktur vegetasi penyusun hutan pada kawasan arboretum sebagai pemelihara mata air Sungai Bolango. Penelitian dimulai dengan mengidentifikasi sumber mata air, tanah, dan kondisi vegetasi eksisting. Metode wawancara kepada masyarakat setempat dilakukan untuk mendukung data etnobotani. Kajian lahan dilakukan antara lain tata guna, kelas kemampuan, konsep pengelolaan, kesesuaian lahan, dan penentuan vegetasinya. Hasil identifikasi sumber mata air menunjukkan bahwa terdapat 3 lokasi yang potensial dibangun arboretum, yaitu Desa Meranti Kecamatan Tapa Kabupaten Bone Bolango, Desa Dulamayo Selatan Kecamatan Telaga Kabupaten Gorontalo, dan Desa Mongiilo Kecamatan Bolango Ulu Kabupaten Bone Bolango. Berdasarkan data kualitas tanah, ketiga lokasi memiliki media perakaran yang cukup baik untuk tanaman budi daya. Secara umum, semua jenis tanaman budi daya sesuai untuk ditanam di ketiga lokasi arboretum. Perlu dilakukan pembuatan teras dan penerapan pola tanam konservasi yang mengaplikasikan tanaman penutup tanah (cover crop), tanaman budi daya, dan pohon penyusun hutan. Selain itu, perlu pemberian pupuk organik berupa kompos dan pupuk kandang

DESAIN VEGETASI BERNILAI KONSERVASI DAN EKONOMI PADA KAWASAN PENYANGGA SISTEM TATA AIR DAS BOLANGO (Designing of Vegetation which Conservation and Economic Values in the Buffer Area of Water System at the Bolango Watershed)

ABSTRAKPerencanaan pembangunan arboretum di DAS Bolango dengan konsep konservasi dan ekonomi perlu dilakukan karena DAS ini memiliki peranan yang penting dalam kehidupan masyarakat sekitar. Tujuan penelitian ini adalah memberikan rekomendasi tentang komposisi dan struktur vegetasi penyusun hutan pada kawasan arboretum sebagai pemelihara mata air Sungai Bolango. Penelitian dimulai dengan mengidentifikasi sumber mata air, tanah, dan kondisi vegetasi eksisting. Metode wawancara kepada masyarakat setempat dilakukan untuk mendukung data etnobotani. Kajian lahan dilakukan antara lain tata guna, kelas kemampuan, konsep pengelolaan, kesesuaian lahan, dan penentuan vegetasinya. Hasil identifikasi sumber mata air menunjukkan bahwa terdapat 3 lokasi yang potensial dibangun arboretum, yaitu Desa Meranti Kecamatan Tapa Kabupaten Bone Bolango, Desa Dulamayo Selatan Kecamatan Telaga Kabupaten Gorontalo, dan Desa Mongiilo Kecamatan Bolango Ulu Kabupaten Bone Bolango. Berdasarkan data kualitas tanah, ketiga lokasi memiliki media perakaran yang cukup baik untuk tanaman budi daya. Secara umum, semua jenis tanaman budi daya sesuai untuk ditanam di ketiga lokasi arboretum. Perlu dilakukan pembuatan teras dan penerapan pola tanam konservasi yang mengaplikasikan tanaman penutup tanah (cover crop), tanaman budi daya, dan pohon penyusun hutan. Selain itu, perlu pemberian pupuk organik berupa kompos dan pupuk kandang. ABSTRACTArboretum development planning in Bolango Watershed using concept of conservation and economy is conducted because the watershed has an important role in people's lives around. This study aims to provide recommendations about composition and structure of forest vegetation in the arboretum area for conserving of Bolango River’s water springs. The study began by identifying the source of the springs, soil, and the existing vegetation. Interview to local communities was conducted to support the data of ethnobotany. Land observation was studied among other land use, class capabilities, management concepts, land suitability, and vegetation selection. The results of the identification of water sources indicated that there were three potential sites built arboretum, i.e Meranti Village Tapa District of Bone Bolango Regency, Dulamayo Selatan Village, Telaga District of Gorontalo Regency, and Mongiilo Village Bolango Ulu District of Bone Bolango Regency. Based on the data of the soil quality, the third location had a pretty good rooting medium for plant cultivation. Generally, all of plant cultivation were suitable to planted in the third location of arboretum. There were important to built terraces and applicate a model of conservation plants using cover crops, cultivation plants, and trees. In addition, it should be applicated organic fertilizer such as compost and manure

The Pemetaan Tingkat Bahaya Erosi dengan Pemanfaatan Teknologi Drone di DTA Cipaheut Sub DAS Cikapundung Hulu

Technology in the field of mapping is constantly evolving to provide convenience for human work. One of the innovations that are developing in today’s modern era is drone or Unmanned Aerial Vehicle (UAV). Erosion mapping and erosion measurements are carried out to determine the potential risk of erosion in certain areas. The erosion risk map shows the distribution of erosion hazard levels in an area. The objective of this research is to determine erosion prediction and erosion hazard levels spatially based on USLE (Universal Soil Loss Equation) method using drone. The used of UAV for collecting data to generate soil erosion risk map at detail scale based on USLE method is relatively infrequently done in Indonesia. The research was conducted in Cipaheut Watershed, Cikapundung Hulu Sub-watershed, Cimenyan, Cimenyan, Bandung Regency, West Java. The results of the study show that the role of drone is very helpful in mapping general conditions and land use spatially. In addition, drones are able to provide actual data sources to identify the physical factors needed in the USLE method of erosion calculations such as LS, C and P factors. Erosion prediction and erosion hazard levels can be calculated using data acquired from drones. There are 8 SPLs with a total land area of ​​225.10 Ha. SPL 5 with the use of dry land and steep slope have the highest erosion prediction values ​​of 703.1207 tons/ha/year and an erosion hazard index of 87.8901 tons/ha/year with a very high level of erosion hazard.&nbsp