Cooking Fuels and Jatropha in Northern TZ

Jan 2011

Cooking fuels

Minimum Median MaximumCharcoal 0 1.69 33.33Wood 63.33 96.67 100Crop/straw/dung 0 0 4.0Kerosene/Coal/Elect 0 0 5.2

Village averages (n=48 villages)

Cooking stoves

Minimum Median MaximumOpen fire 66.67 96.67 100Open stove 0 1.67 31.67Closed stove 0 0 4.00

Village averages (n=48 villages)

Correlation between charcoal & open stoves

0 5 10 15 20 25 30 350%

5%

10%

15%

20%

25%

30%

35%

R² = 0.960499742706393

% using charcoal

% u

sin

g c

oo

k s

tov

e

>50%

>40%

>30%>20%>10%>0%0%

Who grows jatropha?

0 0.1 0.2 0.3 0.4 0.5 0.6 0.70

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

R² = 0.453095488922258

Grow Jatropha

Aw

are

of

Ja

tro

ph

a

Awareness of jatropha reaches a peak in villages where at least 15% grow jatropha

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.00

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

R² = 0.172839931163607

R² = 0.206088051020692

Prop. Sukuma

Ja

tro

ph

a

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.80

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

R² = 0.116504702290727

R² = 0.354076589707314

Prop. completing primary school

Ja

tro

ph

aAwarenessGrow

• Awareness of jatropha is highest in better-educated villages and in Sukuma villages

• Sukuma villages also grow more jatropha.

0 50 100 150 200 250 300 350 400 450 5000

0.1

0.2

0.3

0.4

0.5

0.6

0.7

R² = 0.273810034259369

Cotton

Gro

w J

atr

op

ha

0 1 2 3 4 5 6 70

0.1

0.2

0.3

0.4

0.5

0.6

0.7

R² = 0.185007010423282

Wealth

Ja

tro

ph

a

0 2 4 6 8 10 12 14 16 180

0.1

0.2

0.3

0.4

0.5

0.6

0.7

R² = 0.236985632509669

Acres cultivated

Ja

tro

ph

a

30 40 50 60 70 80 90 1000

0.1

0.2

0.3

0.4

0.5

0.6

0.7

R² = 0.171979225551797

Rainfall

Ja

tro

ph

a

Jatropha is grown most in villages with moderate rainfall, wealth, farm size and cotton production

-0.20 -0.15 -0.10 -0.05 0.00 0.05 0.10 0.150

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

R² = 0.128899270628376

R² = 0.544327991781633

NDVI

Ja

tro

ph

a

0 0.1 0.2 0.3 0.4 0.5 0.6 0.70

1

2

3

4

R² = 0.111173576548467

Grow Jatropha

Hu

ng

er

Ind

ex Widespread jatropha

production does not increase household hunger

Villages with low awareness of jatropha and slightly lower levels of jatropha production have lost the most vegetation over the past 10 yrs