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Apong Sandrawati
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Identifikasi Zona Agroekologi dan Kesesuaian Lahan Komoditas Mangga Arumanis (Mangifera indica L.) di Kabupaten Probolinggo Apong Sandrawati; Abraham Suriadikusumah; Ajeng Dwi Yuningtyas
Soilrens Vol 15, No 1 (2017)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (762.425 KB) | DOI: 10.24198/soilrens.v15i1.13342

Abstract

Probolinggo district is the one of the largest mango producing in Indonesia. Mango (Mangifera indica L.) is a fruit with a very good potential to be developed. Production of mango in Probolinggo district was decreased. The aim of this research to determine the land suitability for arumanis mango in Probolinggo district. This research has conducted in April untill May 2016 at Probolinggo district and Faculty of Agriculture, University of Padjadjaran. Land evaluation based on agroecological zone are slopes, drainage, moisture and temparature. Sampling spot are used composite sampling based on agroecological zones and data analysis using descriptive and comparative methods. Results of the research suitability of arumanis mango land in Probolinggo district there are three classes which enough suitable (S2), marjinal suitable (S3), and not suitable forever (N2) land suitability class with a major limiting factor slope, texture, temperature, effective depth and precipitation. Based on the result, in conclusion zone I, II and III with 69.851,36 Ha and 54,58 % is suitable for development arumanis mango in Probolinggo district.Keywords: arumanis mango, agroecological zones, land suitability
Keterkaitan parameter nilai pH, C-organik, N-Total, C/N dan alofan pada beberapa Andisols di Jawa Barat Rina Devnita; Mahfud Arifin; Ridha Hudaya; Ade Setiawan; Apong Sandrawati
Soilrens Vol 15, No 1 (2017)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/soilrens.v15i1.13459

Abstract

The correlation of chemical parameters and soil mineralogy one to another in Andisols were interesting to be studied, to increase the understanding of soil reactions, nutrient availability and soil mineral content. Andisols from three locations and derived from three different volcanic eruptions namely G. Tangkuban Parahu, G. Patuha and G. Tilu, with andesite, andesite-basalt and basalt parent materials respectively, were examined the correlation of several soil parameters. The values of pH, organic carbon, total nitrogen, C/N and allophane content were obtained from the soil analysis of every horizon of the soil profiles at each site. Correlation analyses were used to see the relationship of the parameters. The results showed a negative correlation between pH and organic carbon (r = -590 *). The soil pH values were positively correlated with the amount of allophane (r = 0.687 *). The pH values were correlated positively with imogolite content (r = 0.356 *). The pH values were negatively correlated with organic carbon (r = -0.590 *). The organic carbon content was negatively correlated with depth (r = - 0.582 *). The organic carbon content was negatively correlated with allophane (r = 0.707 *). Total nitrogen values were negatively correlated with increasing depth (r = -0.531 *).Keywords: Mt. Tangkuban Parahu, Mt. Patuha, Mt. Tilu, andesit, andesit-basalan, alophane
Studi Perubahan Unsur Kalium Akibat Pemupukan dan Pengaruhnya terhadap Hasil Tanaman Oviyanti Mulyani; Encep Hidayat Salim; Anni Yuniarti; Yuliati Machfud; Apong Sandrawati; Marisa Puspita Dewi
Soilrens Vol 15, No 1 (2017)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (579.621 KB) | DOI: 10.24198/soilrens.v15i1.13348

Abstract

Balanced fertilization is one solution to support sustainable agriculture.This experiment was conducted to determine the study of potassium caused by balanced fertilization. The experimental method used a Randomized Block Design (RBD) single factor with ten treatments and three replications, so the total is 30 experimental plots. The ten treatments consisted of : without fertilizer (0), ½, 1, 1,5 and 2 doses of organic fertilizer + without fertilizer (0), ¼, ½, ¾ and 1 doses of anorganic fertilizer. The results of this experiments showed that there were significant effects on potencial K, exchangeable K, K uptake and yield of pakchoy from combination of organic fertilizer with anorganic fertilizer. The treatment 1½ dose of organic fertilizer + 1 dose of anorganic fertilizer produce the highest yield of pakchoy with 5.13 kg plot-1 (increase 100 % than control).Keywords: Azolla pinnata compost, litter, peat, solid biofertilizer
Pedogenesis Dan Klasifikasi Tanah Yang Berkembang Dari Dua Formasi Geologi Dan Umur Bahan Erupsi Gunung Tangkuban Perahu Mahfud Arifin; Rina Devnita; Ridha Hudaya; Apong Sandrawati; Daud Siliwangi Saribun; Rachmat Harryanto; Ganjar Herdiansyah
Soilrens Vol 15, No 1 (2017)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (874.926 KB) | DOI: 10.24198/soilrens.v15i1.13341

Abstract

The efforts to utilize the agricultural land need a proper understanding of the soil characteristics. The soil characteristics themselves are influenced by the factors that regulate and control the soil forming and pedogenesis processes. The main soil forming factors in this study was the different ages and composition of parent materials from the eruption of Mt. Tangkuban Parahu in West Java. This research was done to comprehend the pedogenesis and to figure out the soil classifications that developed in two geological formations (Qyd and Qvu) and two ages of eruption (Holocene and Pleistocene) of Mt. Tangkuban Parahu. The study was conducted in Ciater, Subang Regency and Jatinangor, Sumedang Regency in West Java Province. The study consisted of four stages: preparation, field survey and soil sampling, laboratory analysis and presenting the report. The results showed that Pedon of Jatinangor consisted of three different stratifications of ages. The clay mineralogical composition was dominated by kaolinite, whereas mineralogical composition of the sandy fractions (heavy fractions) was augite-hypersthene. Pedon of Ciater also consists of three different stratifications of age. The clay mineralogical composition was dominated by allophane, while mineralogical compositions of the sandy fractions (heavy fractions) were green amphibole-hypersthene in the overlying horizons and amphibole-augite in the underlying horizons. The stage of soil formation on both pedon were cambic or viril. The soil classification according to Soil Taxonomy were Acrudoxic Durudands, medial over loamy-skeletal, isohyperthermic in Ciater Pedon and Fluventic Eutrudepts, fine, kaolinitic, isohyperthermic in Jatinangor Pedon.Key words: slow sand filter, activated carbon, silica sand, sand, gravel, zeolite
Co-Authors Abraham Suriadikusumah Ade Setiawan Ajeng Dwi Yuningtyas Anni Yuniarti Daud Siliwangi Saribun Encep Hidayat Salim Ganjar Herdiansyah Mahfud Arifin Marisa Puspita Dewi Oviyanti Mulyani Rachmat Harryanto Ridha Hudaya Rina Devnita Yuliati Machfud