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Supriyadi Supriyadi

Program Studi Ilmu Tanah, Fakultas Pertanian Universitas Sebelas Maret, Surakarta

Author-ID : 2527071

Earth & Planetary Sciences

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Penentuan Indeks Kualitas Tanah Agroforestri Berdasarkan Sifat Kimia Tanah di Sub-DAS Bengawan Solo Hulu Wonogiri Nur Machfiroh; Supriyadi Supriyadi; Sri Hartati
Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 11, No 2 (2014)
Publisher : Faculty of Agriculture, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15608/stjssa.v11i2.227

Title : Determination of Soil Quality Index Based on Soil Chemical Properties at The Upstream of Bengawan Solo River Basin Wonogiri. Land conversion extended to the upper of the watershed for residential and agricultural so soil’s ability is decreased to support the soil quality. To solve these problems, in the region upstream of Bengawan Solo, enforced by Agroforestry plantings. Research carried out at the upstream of Bengawan Solo Wonogiri and Laboratory of Chemistry and Fertility of Soil Faculty of Agriculture, Sebelas Maret University Surakarta, in June 2013 until March 2014. Research used a survey method by descriptive and exploratory. Determination of the location of the site sample is done by a stratified random sampling based onland map unit. Sampling was done by a purposive sampling method. The soil quality index is determined by summing the scores for each variable which has selected from Principal Component Analysis (PCA), and then it multiplied by the weight index. The result of the study show that the soil quality of Agroforestry in the upstream of Bengawan Solo Wonogiri based on the chemical properties of the soil is low. The value of soil quality index in the secondary forest is 2.6. While in the Agrosilvopastoral is 2.3 and in the Agrisilviculture is 2.1, which are lower than the secondary forest. Whereas in the Silvopastoral is 3.0, which is higher than the secondary forest.

Kajian Penambahan Bakteri Asam Laktat dan Kompos Tithonia Diversifolia terhadap Penurunan Toksisitas Al pada Berbagai Waktu Inkubasi di Ultisol Jumantono Supriyadi Supriyadi; Rahayu Rahayu; Amalliya Radi Rohmaani
Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 9, No 1 (2012)
Publisher : Faculty of Agriculture, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15608/stjssa.v9i1.233

Tittle : The Examine of Adding Lactic Acid Bacteria and Tithonia Diversifolia Compost on Decreasing Al Toxicity The Several of Time Incubation in Ultisol Jumantono. The purpose of this experiment is to know decreasing of Al toxicity with adding Lactic Acid Bacteria and Tithonia diversifolia compost on ultisols. The research was conducted in the Green House and Soil Chemistry Fertility Laboratory of Agriculture Faculty of Sebelas Maret University Surakarta.This research is designed experimental and using Completely Randomize Design (CRD) by single experiment, consist of 22 treatments with three replications, combination of Tithonia : 0 ton/ha, 2 ton/ha, and 3 ton/ha, Lactic Acid Bacteria : 0 %, 10 % and 20 %, and then SP-36 fertilizer : 0 kg/ha, 50 kg/ha, 100 kg/ha and 150 kg/ha. Variables observation are primary variables (Aldd, Al active and Al total), and secondary variables (pH, organic mater, available P). Statisticals analysis used F-Test, Kruskal-Wallis Test, Correlation Test, Mood Median Test and DMRT 5 %. This experiment showed that adding of Lactic Acid Bacteria, Tithonia diversifolia compost and P fertilizer are have significant effect to Aldd, active Al and Al total in Ultisols. The time that decreas Aldd and Al active significanly is 30 inkubation, as Al total to low is 50 inkubation. The best experiment to decreas Al is Tithonia 2 ton/ha + BAL 20% from compost + SP-36 fertilizer 100 kg/ha.

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