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Mochtar Luthfi Rayes

Jurusan Tanah Fakultas Pertanian Universitas Brawijaya

Author-ID : 5688355

Agriculture, Biological Sciences & Forestry Environmental Science

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PENERAPAN SISTEM INFORMASI GEOGRAFI DALAM PENDUGAAN SEBARAN DAERAH RAWAN LONGSOR DI KECAMATAN NGARGOYOSO, KABUPATEN KARANGANYAR Reza Muhammadi; Mochtar Luthfi Rayes; Istika Nita
Jurnal Tanah dan Sumberdaya Lahan Vol. 6 No. 1 (2019)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Ngargoyoso Sub-district is one of the areas that have the potential of landslides. To find out and observe landslide hazard, it is necessary to identify and mapping the area. This study was conducted from November 2017 to April 2018 at nine villages in Ngargoyoso sub-district. The method of the study was scoring of rainfall, slope, land use, geology, permeability, texture and effective depth of soil. The landslide-prone area were classified into three classes, i.e., low, medium, and high of landslide-prone. Low landslide-prone class had characteristics of flat slope with land uses are in the form of settlement, plantation, rice field and moor. The dominant areas are located in the land mapping units of 1,3,4,5 and 9 in Dukuh, Nglegok and Puntukrejo Villages. Medium landslide-prone class had characteristics of steep to very steep slope with land uses are in the form of forest/plantation, settlement, shrubs and rice field. The dominant areas are the in the land mapping units of 3, 4, 5, 6, 7, 8, 10, 11, 12, 14 and 15, that dominant in Girimulyo, Kemuning, Jatirejo and Nglegok Villages. High landslide-prone class had characteristics of steep slopes to very steep slopes with land uses of forest/plantation land use, shrubs, and rice fields. High landslide-prone class was dominant in Berjo, Ngargoyoso and Segorogunung Villages that are in te land mapping units of 6,7, 8, 11, 12, 13, 15 and 16. The validation result of landslide-prone area map showed the accuracy level of 85.71%.

EVALUASI KESESUAIAN LAHAN PADI PADA SAWAH IRIGASI DI KECAMATAN JUNREJO KOTA BATU Abel Fabyan Fernando Sareh; Mochtar Luthfi Rayes
Jurnal Tanah dan Sumberdaya Lahan Vol. 6 No. 1 (2019)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Rice is the most important food crop because most of the Indonesian population uses rice (processed rice grains) as a staple food to meet nutritional needs. Junrejo District is the main center for rice cultivation (irrigated rice fields) in Batu City. There is a variation in the production of irrigated rice in the District of Junrejo, so it is necessary to evaluate the suitability of the land to assess the potential or class of land suitability for the purpose of land use. The conditions for growing existing plants are not in accordance with the facts of production in the field, so it is necessary to modify the conditions for growing rice. The purpose of this study was to evaluate land suitability of rice on irrigated rice fields in Junrejo District of Batu. The characteristics of the land measured were pH H2O, organic-C, total-N, available-P, exchangeable-K, cation exchange capacity, base saturation, and soil texture. Land characteristics that have been analyzed were then matched. Modification of new plant growth requirements used the Boundary Line and Production Results equation. The results showed that the land suitability classes for each land mapping unit (LMU) in Junrejo District were as follows: S2 forÂ LMU 1, and S3 for LMU 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, and 13. The liming factors for each LMU were availability of nutrients (total-N, available-P, exchangeable-K), as wells as organic-C content and base saturation.

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