Delineation of Agroecological zones and subzones

Thirty agro-ecological sub zones (AEZIa to AEZXIIc) were delineated in the study area (Table 4) by GIS aided integration of nine agro-climatic and eight agro-edaphic zones (Fig. 6). Results revealed that the majority of area falls in XIa whereas minimum area is occupied by Via (Patel et al., 2002). The other larger sub-zones are Ib and VIIIa, respectively. AEZIc and AEZIIc are the most potential zones for intensive cropping with possibility of two and three crops such as paddy - wheat or sugarcane - wheat (Table-4). Further sub-ecological zones are reclassified by GIS aided integration in which subzones are clubbed into main agro-ecological zones. Therefore, twelve agro-ecological zones (AEZI to AEZXII) are identified in the study area. The spatial

Table 4. Spatial extent of Agro-Ecological Sub Zones

Sl.No.

AEZ

AE Sub Zone

Description

Area (ha)

(%)

1.

I

a

Equatorial, semiarid very gently sloping alluvial plain with loamy to fine loamy soils and low biomass

74487.48

6.50

2.

I

b

Equatorial, semiarid very gently sloping alluvial plain with loamy to fine loamy soils and medium biomass

107997.1

9.42

3.

I

c

Equatorial, semiarid very gently sloping alluvial plain with loamy to fine loamy soils and high biomass

10111.92

0.88

4.

n

a

Equatorial, semiarid very gently sloping in alluvial plain with coarse loamy soils and low biomass

80015.28

6.98

5.

n

b

Equatorial, semiarid very gently sloping in alluvial plain with coarse loamy soils and medium biomass

64135.22

5.59

6.

n

c

Equatorial, semiarid very gently sloping in alluvial plain with coarse loamy soils and high biomass

2371.58

0.21

7.

m

a

Equatorial, semiarid gently sloping valley fills with coarse loamy soils and low biomass

46335.98

4.04

8.

m

b

Equatorial, semiarid gently sloping valley fills with coarse loamy soils and medium biomass

24758.47

2.16

9.

m

c

Equatorial, semiarid gently sloping valley fills with coarse loamy soils and high biomass

77.76

0.01

10.

IV

a

Sub equatorial, Sub humid to humid gently sloping valley fills with coarse loamy soils and low biomass

34531.08

3.02

Sl.No.

AEZ

AE Sub Zone

Description

Area (ha)

(%)

11.

IV

b

Sub equatorial, Sub humid to humid gently sloping valley fills with coarse loamy soils and medium biomass

11631.71

1.01

12.

V

a

Equatorial, semiarid gently sloping piedmont plain with coarse loamy soil and low biomass

42151.25

3.68

13.

V

b

Equatorial, semiarid gently sloping piedmont plain with coarse loamy soil and medium biomass

34266.01

2.99

14.

V

c

Equatorial, semiarid gently sloping piedmont plain with coarse loamy soil and high biomass

968.43

0.08

15.

VI

a

Sub equatorial, Sub humid to humid gently sloping piedmont plain with coarse loamy soils and low biomass

7.07

0.00

16.

VI

b

Sub equatorial, Sub humid to humid gently sloping piedmont plain with coarse loamy soils

1180.48

1.10

17.

VII

a

Warm temperate, per humid moderately steep to steep sloping piedmont plain with coarse loamy soils and low biomass

5444.59

0.57

18.

VII

b

Warm temperate, per humid moderately steep to steep sloping piedmont plain with coarse loamy soils

6976.9

0.61

19.

VIII

a

Sub equatorial, Sub humid to humid moderate steep to steep sloping Hills with loam to fine loam soils and low biomass

123103.1

10.75

20.

VIII

b

Sub equatorial, Sub humid to humid moderate steep to steep sloping Hills with loam to fine loam soils

65662.08

"O

Sl.No.

AEZ

AE Sub Zone

Description

Area (ha)

(%)

21.

IX

a

Equatorial, semiarid moderate steep to steep sloping in Hills with loam to fine loamy soils and low biomass

35354.6

3.08

22.

IX

b

Equatorial, semiarid moderate steep to steep sloping in Hills with loam to fine loamy soils and medium biomass

15561.97

2.67

23.

IX

c

Equatorial, semiarid moderate steep to steep sloping in Hills with loam to fine loamy soils and high biomass

498.35

.05

24.

X

a

Warm temperate, per humid moderately steep to steep sloping Hills with coarse loamy skeletal soils and low biomass

2286.76

0.20

25.

X

b

Warm temperate, per humid moderately steep to steep sloping Hills with coarse loamy skeletal soils and medium biomass

3990.33

0.34

26.

XI

a

Sub equatorial, Sub humid to humid moderate steep to steep sloping Hills with loamy skeletal soils and low biomass

182201.9

15.88

27.

XI

b

Sub equatorial, Sub humid to humid moderate steep to steep sloping Hills with loamy skeletal soils and medium biomass

106272

9.27

28.

XII

a

Equatorial, semiarid moderate steep to steep sloping Hills with loamy skeletal soils and low biomass

2940.62

0.26

29.

XII

b

Equatorial, semiarid moderate steep to steep sloping Hills with loamy skeletal soils and medium biomass

43830.09

3.82

30.

XII

c

Equatorial, semiarid moderate steep to steep sloping Hills with loamy skeletal soils and high biomass

353.44

0.03

Table 5. Spatial extent of Agro-Ecological Zones rv>

Table 5. Spatial extent of Agro-Ecological Zones

Sl.No.

AEZ

Description

Area (ha)

(%)

1.

I

Equatorial, semiarid very gently sloping in alluvial plain with loamy to fine loamy soils

192596.5

16.8

2.

n

Equatorial semiarid very gently sloping in alluvial plain with coarse loamy soils

146522.1

12.78

3.

m

Equatorial, semiarid gently sloping in valley fills with coarse loamy soils

71172.21

6.21

4.

IV

Sub equatorial, Sub humid to humid gently sloping valley fills with coarse loamy soils

4842.13

4.03

5.

V

Equatorial, semiarid gently sloping piedmont plain with coarse loamy soil

77385.69

6.75

6.

VI

Sub equatorial, Sub humid to humid gently sloping piedmont plain with coarse loamy soils

1187.55

1.10

7.

VII

Warm temperate, per humid moderately steep to steep sloping piedmont plain with coarse loamy soils

12421.49

1.18

8.

VIII

Sub equatorial, Sub humid to humid moderate steep to steep sloping Hills with loamy to fine loamy soils

188765.2

16.47

9.

IX

Equatorial, semiarid moderate steep to steep sloping in Hills with loam to fine loamy soils

51414.92

6.80

10.

X

Warm temperate, per-humid moderately steep to steep sloping Hills with coarse loamy skeletal soils

6277.09

0.54

11.

XI

Sub equatorial, Sub humid to humid moderate steep to steep sloping Hills with loamy skeletal soils

288474.2

25.15

12.

XII

Equatorial, semiarid moderate steep to steep sloping Hills with loamy skeletal soils

47124.15

distribution of these zones is presented in Figure 6. The area covered ranges from 0.54 % in AEZ X to 25.15 % in AEZ XI. The whole hilly portion falls in AEZ VIII whereas lower alluvial plain in AEZ I and AEZ II (Table-5). A suitable land use (Fig. 3) plan for sustainable use of land resource for the Kumaon region was suggested based on characteristics of AEZs and existing land use pattern.

Figure 6. Agro-ecological zones
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