(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

(viii)

(ix)

PCA axis 1 (i)

1.000

-

-

-

-

-

-

-

-

PCA axis 2 (ii)

0.028

1.000

-

-

-

-

-

-

-

PCA axis 3 (iii)

−0.080

0.049

1.000

-

-

-

-

-

-

PCA axis 4 (iv)

0.027

0.045

−0.049

1.000

-

-

-

-

-

PCA axis 5 (v)

0.003

0.041

0.016

0.066

1.000

-

-

-

-

Area of bamboo-tree gardens (vi)

0.203^*

0.177

−0.201^*

0.108

0.048

1.000

-

−

-

Area of upland arable lands (vii)

−0.033

0.170

0.012

0.084

0.262^*

−0.104

1.000

-

-

Area of paddy fields (viii)

0.239^*

−0.217^**

−0.113

−0.043

−0.133

0.268^**

−0.282^**

1.000

-

Area of home gardens (ix)

−0.100

0.136

0.023

−0.095

0.125

0.122

0.140

−0.036

1.000