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SOIL MANAGEMENT

SOIL MANAGEMENT. IN ACID SULPHAT SOILS. Management Oil Palm On Acid Sulphate Soil (ASS). Max Yield. Nutrient Management. Soil Management. Water Management. Oxidation prevention. Tide prevention. Infrastruktur hidrologi. Tata Lahan dan air. Drainage System. Leaching. Ameliorase.

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SOIL MANAGEMENT

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  1. SOIL MANAGEMENT IN ACID SULPHAT SOILS

  2. Management Oil Palm On Acid Sulphate Soil (ASS) Max Yield Nutrient Management Soil Management Water Management Oxidation prevention Tide prevention Infrastruktur hidrologi Tata Lahan dan air Drainage System Leaching Ameliorase Irigation System Fertilizer ASS Acid Sulphate Soil

  3. Management Oil Palm On Acid Sulphate Soil (ASS) OBSERVATION Soil Management Water Management Nutrient Management Elevation Rainfall Tide Fluctuation Pyrite Depth Water Quality (Nutrient, pH, etc) Structure (evaporation, percolation, permeability, infiltration,etc) Acid Sulphate Soil

  4. Water Management Deep Shallow and Wide Oxidation Oxidation Drain Drain Pyrite Layer No Oxidation No Oxidation Drain Drain Pyrite Layer Acid Sulphate Soil

  5. New Inovation A B C A Light Brown/Grey (Clay) ± 50 cm Light Brown/Grey (Clay) ± 20 cm H2S Smell 1,8 m B Field Drain Black/Blue grey/Dark grey ± 50 cm H2S Smell C Collection Drain Main Drain • Pada timbunan (bunding atau jaringan jalan) saat pembuatan sistem drainase,tanah sulphate masam (horizon C) harus berada di posisi paling bawah (tertimbun) oleh tanah lapisan atasnya untuk mencegah oksidasi yang berlebihan. Kembali pada posisi semula pada profil horison tanah alami. (Philip Mulvey). Acid Sulphate Soil

  6. Water Management • Pencegahan oksidasi terhadap pirit yang berada dalam blok pun akan dipengaruhi oleh jarak parit dengan pirit tersebut. Semakin cepat air meresap dan menutupi lapisan atas pirit, maka semakin efektif juga upaya kita untuk menciptakan kondisi anaerob (reduksi). • Dengan demikian, mengetahui tingkat permeabilitas tanah di lapangan adalah hal yang penting untuk menentukan jarak antar parit (field drain) yang tepat. Ini dapat dilakukan dengan pembuatan sumur pantau di dalam blok untuk membandingkan level permukaan air tanah dalam blok dengan level air pada saluran drainase. Acid Sulphate Soil

  7. Water Movement In Clay Soil Drain Drain Pada saat setelah hujan di lapangan, posisi level permukaan air di saluran drainase akan lebih rendah dari permukaan air di lahan (dalam blok). Begitupun sebaliknya. (Frederick R. Troeh and Louis Thompson, 2005). Exposed Drain Drain

  8. Soil Management • Jika oksidasi tidak dapat dicegah, maka perlu dilakukan pencucian (leaching) dan aplikasi bahan pembenah tanah danpengapuranuntuk mengurangi keracunan dan kemasaman tanah. • Meski demikian, pertimbangan ekonomis dalam aplikasi bahan pembenah tanah ini perlu diperhatikan. Acid Sulphate Soil

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