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