Water availability Rooting conditions Nutrient retention Nutrient availability surface Toxicity Terrain Water availability Rooting conditions Nutrient retention

Lampiran 5 Penetapan kelas kesesuaian lahan padi paddy rice LAND SUITABILITY CLASS Suitable S LIMITING FACTORS Highly S1 Moderately S2 Marginally S3 Not Suitable N t. Temperatur regime 1. Annual average temperature o C 25 – 29 30 - 32 22 – 24 33 - 35 18 - 21 35 18

w. Water availability

1. Dry months 75 mm

2. Average annual rainfall mm

0 - 3 1500 3,1 - 9 1200 - 1500 9,1 - 9,5 800 - 1200 9,5 800

r. Rooting conditions

1. Soil Drainage Class 2. Soil texture surface 3. Rooting depth cm 4. Peat depth cm somewhat poor, moderately well sandy clay loam, silty loam, silt, clay loam 50 50 very poor, poor loam, silty clay loam, silty clay, clay 41 - 50 50 – 75 well sandy loam 20 - 40 76 - 100 somewhat excessive, excessive loamy sand, sand, gravely 20 100

f. Nutrient retention

1. CEC me100g subsoil 1 2. pH surface soil ≥ medium 5,5 - 6,5 low 6,6 - 7,5 5,0 - 5,4 very low 7,6 - 8,5 4,0 - 4,9 - 8,5 4,0

n. Nutrient availability surface

1 1. Total N 2. Available P ppm 3. Exchangeable K me100g ≥ medium very high ≥ medium low high low very low ≤ medium Very low - - -

x. Toxicity

1. Salinity mmhoscm, 25 o C, subsoil 2. Al-saturation 3. Depth of pyrites cm 4 - 100 4 - 8 - 75 - 100 8 - 16 - 50 - 74 16 80 50

s. Terrain

1. Slope 2. Surface stoniness 3. Rock outcrops 3 3 - 5 5 - 8 1 8 ≥ 1 ≥ 2 Sumber: Saefulhakim 1994 Lampiran 6 Penetapan kelas kesesuaian lahan tanaman semusim annual upland crops LAND SUITABILITY CLASS Suitable S LIMITING FACTORS Highly S1 Moderately S2 Marginally S3 Not Suitable N t. Temperatur regime 1. Annual average temperature o C 23 – 27 28 - 30 22 - 24 31 - 33 18 - 21 33 18

w. Water availability

1. Dry months 75 mm

2. Average annual rainfall mm

3 - 7,5 1500 7,6 - 8,5 1000 - 1500 8,6 - 9,5 600 - 1000 9,5 600

r. Rooting conditions

1. Soil Drainage Class 2. Soil texture surface 3. Rooting depth cm 4. Peat depth cm moderately well, well loam, sandy clay loam, silty loam, silt, clay loam, silty clay loam 50 50 Somewhat poor, somewhat excessive sandy loam, sandy clay 41 - 50 50 – 75 poor loamy sand, silty clay, structured clay 25 - 50 100 - 200 very poor, excessive gravely, sand, massive clay 20 100

f. Nutrient retention

1. CEC me100g subsoil 1 2. pH surface soil ≥ medium 6,7 – 7,0 low 7,1 - 7,5 5,5 - 5,9 very low 7,6 - 8,5 4,0 - 5,4 - 8,5 4,0

n. Nutrient availability surface