BMP for Farmer Session 2

SESSION TWO

A. LIMITATION OF PEAT

1. POOR NUTRIENT UPTAKE

2. HIGH DOSAGE OF FERTILIZER

3. FIXATION OF MICRO NUTRIENT

1. POOR ROOT ACHORAGE

2. POOR ACCESSIBILITY

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PEAT peat

peat

PEAT

peat PEAT

original ground level

3. HIGH LEACHING

water water

water

fertilizer

water

water

fertilizer fertilizer

4. WATERLOGGED

LIMITATION OF PEAT AFTER DRAINAGE

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soil water table

peat under water

1. IRREVERSIBLE DRYNESS Irreversible dryness on top layer

2. FIRE PRONE

3. SUBSIDENCE OF PEAT

3.PROCESS OF PEAT SUBSIDENCE

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PEAT peat

peat

PEAT

peat PEAT

original ground level

3a. Process of subsidence

water

Water

water water

Water

air air air

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Original ground level

3b. Process of subsidence

ground level after subsidence

air air air

air air

air

air

PEAT UNDER SOIL WATER TABLE

GROUND LEVEL AFTER SUBSIDENCE

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3c. Process of subsidence

ORIGINAL GROUND LEVEL

Example of subsidence

Example of subsidence

Advantages of peat

Advantages of peatland

1. ABUNDANT WATER SOURCE

2. POSSIBLE WATER TRANSPORT SYSTEM

3. Cheap transport cost

.

1. LOW pH

2. LOW NUTRIENTS

3. HIGH CARBON NITROGEN RATIO

4. HIGH CATION EXCHANGE CAPACITY

5. LOW BULK DENSITY

6. LOW BEARING

7. HIGH POROSITY

9. HIGH WATER TABLE