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All Journal Journal of Degraded and Mining Lands Management SAINS TANAH - Journal of Soil Science and Agroclimatology
Purwanto Purwanto
Department of Soil Science, Faculty of Agriculture, Sebelas Maret University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education

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Application of litters to inhibit nitrification in Vertisols on sweet corn (Zea mays S.) Supriyadi Supriyadi; Adiprasetya Widyatama; Gadis Mona Prinandhika; Purwanto Purwanto; Sri Hartati
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 18, No 1 (2021): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v18i1.43631

Abstract

Nitrification, or the process of oxidation of ammonium to nitrate in the soil, needs to be inhibited because it reduces the efficiency of nitrogen fertilizers. Vertisols have 2:1 minerals and have high negative charge, so ammonium is more absorbed by soil particles, whereas nitrate is free to move in the soil and diffuses into the plant tissue or is leached with gravity water. This study aimed to determine the litter treatment that can inhibit the nitrification process in Vertisols on sweet corn plants. This research was conducted in June until November 2019 in the Plastic House of Plesungan, Gondangrejo, Karanganyar, Indonesia. This study used a basic completely randomized design with a single factor (litter type) as an immobilizer. The types of litter used in this study were Gliricidia maculata, Albizia falcataria, Senna siamea, and Tithonia diversifolia. The parameters observed were ammonium content, nitrification potential, average nitrate content, actual nitrification, plant height, number of leaves, and dry crown plant. Tithonia diversifolia gave the highest actual nitrification of 23.26%. Senna siamea has the lowest actual nitrification of 12.36%, followed by Gliricidia maculata with 17.39% and Albizia falcataria with 17.67%. This shows that the Tithonia diversifolia litter has the highest value in inhibiting nitrification. Maize plants treated with the Tithonia diversifolia litter had the best plant growth compared to those applied with other treatments. Therefore, among the treatments used, the Tithonia diversifolia litter was most optimal in inhibiting nitrification in Vertisols.
Spore reproduction, glomalin content, and maize growth on mycorrhizal pot culture using acid mineral soil-based media Vita Ratri Cahyani; Dianing Wahyu Kinasih; Purwanto Purwanto; Jauhari Syamsiyah
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 19, No 1 (2022): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v19i1.59444

Abstract

Arbuscular mycorrhiza (AM) is known as multifunctional fungi for plant helpers under adverse conditions. However, studies that focused on the production strategy of AM biofertilizers with specific targets related to the soil limitations are limited. This study aimed to examine AM inocula from several sources using various compositions of acid mineral soil-based media and maize hosts in pot cultures to obtain effective AM inocula to handle the phosphor (P) limitations in acid mineral soils. Zeolite and Inceptisols were used as comparing media. The study utilized a completely randomized factorial design with two factors, namely C = media composition (C0: zeolite; C1: representative media of Alfisols; C2: typical media of a mixture of Alfisols, Oxisols, and Ultisols; C3: typical media with the addition of Bio-RP nutrition; C4: Inceptisols) and I = AM inoculum source (I0: without inoculum; I1: inoculum from Alfisols; I2: mixed inoculum from Alfisols, Ultisols, and Oxisols; I3: mixed inoculum from eight soil types), and six replications per treatment combination. The AM cultures on acid mineral soil-based media, which yielded the highest mycorrhizal infection, spore reproduction, and glomalin content, were C1I2 and C3I2, while the highest maize growth and P concentration were obtained with C1I1, CII2, C2I1, and C3I2. Compared to all the treatments, C1I1 and C1I2 are the superior AM cultures. Further study is necessary to confirm the effectiveness of AM cultures.
Land suitability evaluation for Curcuma zedoaria Rosc. in the community forest of the upstream Bengawan Solo watershed, Wonogiri, Indonesia Widyatmani Sih Dewi; Supriyadi Supriyadi; Purwanto Purwanto; Aisyah Defara Rahmadani; Wahyu Galang Pranata; Ganjar Herdiansyah
Journal of Degraded and Mining Lands Management Vol 10, No 3 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.103.4369

Abstract

The soil in the upstream Bengawan Solo watershed is at high risk of degradation related to a high erosion rate. Finding the proper crop type with land suitability is critical to protect against further soil degradation. This study aimed to determine the land suitability of white turmeric (Curcuma zedoaria) and the limiting factors in the upstream Bengawan Solo watershed community forest. This research was descriptive-explorative based on a survey of four land map units (LMUs) of Sumberejo village (LMU1, LMU2, LMU3, and LMU4), Batuwarno, Wonogiri. The number of sample points at each LMU depended on the total area of the LMU and was repeated four times. LMU results from overlay soil type maps, administrative maps, rainfall maps, and slope maps. Land suitability assessment was analyzed using the matching method. The land suitability classes of the upstream Bengawan Solo for white turmeric were S3 eh, and N eh. The limiting factors on land suitability for white turmeric are erosion hazards and slopes. The efforts to improve the limiting factor can be made by contour cultivation and repairing the terrace.
Co-Authors Adiprasetya Widyatama Aisyah Defara Rahmadani Dianing Wahyu Kinasih Gadis Mona Prinandhika Ganjar Herdiansyah Jauhari Syamsiyah Sri Hartati Supriyadi Supriyadi Vita Ratri Cahyani Wahyu Galang Pranata Widyatmani Sih Dewi