Page 167 - Plan GI

ผ-5

ตารางผนวก ก-1 (4) ระดับความเหมาะสมของคาพิสัยของคุณภาพที่ดินสำหรับ (สับปะรดทาอุเทน)

LAND - USE REQUIREMENT FACTOR RATING
LAND QUALITY Diagnostic factor Unit S1 S2 S3 N
TEMPERATURE (t) Mean temp. in c 22-26 27-30 31-32 >32
Growing period 21-20 19-15 <15

MOISTURE AVAILABILITY (m) Ann. Rainfall mm. 1000-1500 1500-2000 2000-2500 >2500
900-1000 700-900 <700
Water mm.

in growing period
OXYGEN AVAILABILITY (o) Soil drainage class 5,6 4 3 1,2
NUTRIENT AVAILABILITY (s) N (total) %
P ppm

K ppm
Organic matter %
Nutrient status class VH,H,M L
NUTRIENT RETENTION CAPACITY C.E.C ดินลาง meq/100g >15 5-15 <5
B.S. ดินลาง % >35 <35
ROOTING CONDITIONS (r) Effective soil cm. >50 30-50 20-30 <20
Gravel % <15 15-40 40-80 >80

Root penetration class 1,2 3 4
FLOOD HAZARD (f) Frequency yrs./time 10yrs/1 6-9yrs/1 3-5yrs/1 1-

EXCESS OF SALTS (x) EC. of saturation mmho/c <2 2-3 3-6 >6

SOIL TOXICITIES (Z) Depth of jarosite cm. >150 100-150 50-100 <50
Reaction pH 4.5-6.0 6.1-6.5 6.6-7.8 >7.8

4.0-4.4 3.5-3.9 <3.5
SOIL WORKABILITY (k) Workability class class 1,2 3 4
POTENTIAL FOR Slope class ABC D E >E
MECHANIZATION (w) Rockout crop class 1 2,3 4 5

Stoniness class 1 2 3 4
EROSION HAZARD (e) Slope class AB C D >D
Soil loss ton/rai/yrs <2 2-4 4-12 >12
Note:- Day lenght - short day
Growing period - 12 months (pereninalcrop)
Growing period (moisture) – vegetative growth
Soil texture requirement of crips – vfsl,l,sil,si
Others –