Economics of silvoarable agroforestry

31 Pages·2005·0.89 MB·English

Economics of silvoarable
agroforestry
Paul Burgess1, Anil Graves1
Fabien Liagre2 & Christian Dupraz3
1 Cranfield University, Silsoe, Bedfordshire, UK
2Assemblée Permanente des Chambres d’Agriculture, Paris, France
3INRA, Montpellier, France
Content
1. Investment and labour
2. Cash flow and discount rate
3. Development and validation of a European
biophysical and economic model
4. Economic analysis for a range of tree species
and climates in Europe
1. Investment and labour: establishment costs
• Cost per tree higher than forestry due to marking up and
tree protection
• Cost per ha lower due to low tree density
Example of investment costs in France:
no tree payments
Forestry
113 trees/ha
Poplar
50 trees/ha
Cherry
Walnut
0 500 1000 1500 2000
-1
Establishment costs (€ ha )
Example of investment costs in France:
with tree payments
Forestry
113 trees/ha
Poplar
50 trees/ha
Cherry
Walnut
0 500 1000 1500 2000
-1
Establishment costs (€ ha )
Labour requirements
• Understorey management
• Tree pruning
Labour requirement
walnut agroforestry in France: 120 trees ha-1
Labour required
temps de travail
(hr/ha/a)
(h/ha/an)
16
agriculture
Agriculture
14 cSuillvtuoraersa binletecrcroapla ir e s
aSriblvroeasrable tree
12
10
8
6
4
2
0
1 6 11 16 21 26 31 36 41 46
année
Labour requirement
walnut agroforestry in France: 50 trees ha-1
Labour required
temps de travail
(hr/ha/a)
(h/ha/an)
16
aAggrriiccuullttuurree
14 cSuillvtuoraersa binletecrcroapla ir e s
aSriblvroeasrable tree
12
10
8
6
4
2
0
1 6 11 16 21 26 31 36 41 46
année
2. Cash flow and discount rate
Undiscounted cash flow for cherry forestry, a wheat/wheat/
grain maize system and a silvoarable (113 trees ha-1) system
in Eastern France
50000
Arable
) 40000
1
-a
h Silvoarable

€
(

w 30000
Forestry
o
l
f

h
s
20000
a
c

e
v
i
at 10000
l
u
m
u
C 0
10 20 30 40 50 60
-10000
Time from planting (a)
Effect of discount rate of net present value of silvoarable,
agricultural and forestry systems with poplar in southern
France
15000
)
1
- Silvoarable
a
h
Arable

€
Forestry
e
10000
u
l
a
v

t
n
e
s 5000
e
r
p

t
e
N
0
0 2 4 6 8
Discount rate (%)