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EVALUASI SUMBERDAYA LAHAN

EVALUASI SUMBERDAYA LAHAN. Lahan.

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EVALUASI SUMBERDAYA LAHAN

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  1. EVALUASI SUMBERDAYA LAHAN

  2. Lahan Adalahsuatuwilayahdaerahdipermukaanbumi yang mempunyaisifat-sifatagaktetapataupengulangansifat-sifatdaribiosfersecaravertikaldiatasmaupundibawahwilayahtersebut, termasukatmosfer, tanah, geologi, geomorfologi, hidrologi, tetumbuhan, binatangsertahasilkegiatanmanusiamasalampauataupunmasasekarang, danperluasansifat-sifattersebut. Berpengaruhterhadappenggunaanlahansaatsekarangataupundimasamendatang (FAO, 1976)

  3. EvaluasiLahan Adalahprosespenaksiranpenggunaanlahanapabiladipergunakanuntukmaksud-maksudtertentu, meliputikegiatansurveibentuklahan (landform), tanah, vegetasi, iklim, danaspeklahan yang lain. Untukmembandingkanbentuk-bentukpenggunaanlahan yang diusulkansesuaitujuanevaluasi (FAO, 1976)

  4. SatuanbentuklahanSatuanlahanA11 : A = SISTEM ALUVIAL a1 = SUB-SISTEM ALUVIO-MARIN a11 = RAWAh11 : h = SISTEM PERBUKITAN h1 = BUKIT MEMBULAT h11 = BUKIT MEMBULAT BEROMBAK

  5. Satuanpetalahan • Adalahsatuan (unit) lahan yang dibedakansatudenganlainnyaberdasarkankualitaslahanataukarakteristiklahantertentu. • Contohsatuanlahan yang dibedakanberdasarkansatuantanah, satuanbentuklahan (fisiografi), satuankelaslereng, dansatuanbahaninduksertabeberapasifattambahan (tanah) sepertikedalamantanahefektif, drainase, reaksitanah, KB dan KTK • SPL 1 AsosiasiAluvialEutrikdanGleisolEutrikdataranpasangsurut, tekstur GLD-GD, solumtanahdalam-sangatdalam, drainaseagakterhambat, reaksiagakmasam, KB tinggi, dan KTK rendah-sedang • SPL2 AsosiasiAluvialEutrikdanGleisolEutrikdataranberawa, tekstur GLD-GD, solumtanahdalam-sangatdalam, drainaseagakterhambat, reaksiagakmasam, KB tinggi, dan KTK rendah-sedang

  6. HUBUNGAN KERAPATAN PENGAMATAN DENGAN SKALA SURVEI

  7. Land Capability Classification Capability is the potential of the land for use in specified ways, or with specified management practices.

  8. Structure of Land Capability Classification

  9. LAND SUITABILITY EVALUATION Land suitability evaluation is the process of assessing the suitability of land for specified kind of use. These may be major kinds of land use, such as rainfedagrculture, livestock production, forestry, etc.; or land utilisation types described in more detail, for example rainfed arable farming based on groundnuts and sorghum, irrigated rice production, or softwood plantation.

  10. Structure of Land Suitability Classification

  11. KesesuaianLahanuntukTempatTinggal

  12. KesesuaianLahanuntukJalan

  13. KesesuaianLahanuntukTempatTinggal

  14. KEMATANGAN TANAH (NILAI - N) • Nilainsebagaipetunjuk: • Kemampuantanahmenyanggabebanfisik; • Besarnyapenyusutan (subsidence) apabilatanahkering (misalkarenaperbaikandrainase) n = A – 0,2 R L + 3 H A = Kadar air tanahdalamkeadaanlapangan; R = % debu + pasir L = % Lempung H = % BO (% C x 1,724)

  15. KLASIFIKASI NILAI – n • n ≥ 1 Mentah, tanahencersepertibuburtanah, mudahlewatsela-selajariapabiladiperas. Tanah selalujenuh air, dankemampuanmenyanggabebansangatrendah • n = 0,7 – 1 Agakmatang, tanahsulitlewatsela-selajariapabiladiperas. Tanah selalujenuh air • n ≤ 0,7 matang, tanahtidakdapatlewatsela-selajariapabiladiperas. Kelembabantanahkadang-kadangdarikapasitaslapangan.

  16. KELAS MENGEMBANG DAN MENGERUT MENURUT USDA

  17. END

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