Variables

Entire Sample (N = 1028)

Lowland (N = 596)

Upland (N = 432)

Mean Difference

Mean

SD

Mean

SD

Mean

SD

Production inputs:

Area planted to rice (ha·farm⁻¹)

0.63

1.77

0.63

1.49

0.64

1.13

−0.01

^ns

No. of rice plots (no.·farm⁻¹)

1.29

0.59

1.21

0.53

1.22

0.54

−0.01

^ns

Area per rice plot (ha·plot⁻¹)

0.52

2.25

0.52

3.67

0.52

2.14

−0.01

^ns

Seed (kg·ha⁻¹)

37.1

28.0

37.6

31.1

36.4

23.1

1.20

^ns

Fertilizer adopting (%)

10.7

30.5

7.41

26.2

15.2

35.6

−7.80

^*

Fertilizer applied (kg·ha⁻¹)

2.62

17.1

1.74

14.7

3.82

19.9

−2.09

^*

Herbicide adopting (%)

13.6

34.4

12.8

33.4

14.7

35.6

−1.95

^ns

Herbicide applied (l·ha⁻¹)

0.37

1.37

0.41

1.54

0.33

1.08

0.08

^ns

Weeding labor^b (person-days ha⁻¹)

177

187

178

194

177

177

1.28

^ns

Rainfall:

Total rainfall (mm·yr⁻¹)

1407

252

1434

264

1370

231

64.1

^*

BMR days^c:

1st month^d (days·month⁻¹)

25.4

0.81

25.3

0.95

25.5

0.56

−0.14

^*

2nd month^e (days·month⁻¹)

23.8

1.55

24.0

1.10

23.6

1.99

0.33

^*

3rd month^f (days·month⁻¹)

21.4

1.99

20.8

1.56

22.2

2.21

−1.41

^*

4th month^g (days·month⁻¹)

21.5

1.68

21.2

1.52

22.0

1.78

−0.80

^*

5th month^h (days·month⁻¹)

23.9

1.62

23.3

1.16

24.8

1.78

−1.44

^*

6th monthⁱ (days·month⁻¹)

27.3

1.04

27.5

1.15

27.1

0.80

0.36

^*