Improving Productivity, Profitability and Sustainability of Degraded Grasslands Through Tree-Based Land Use Systems in the Philippines - Smallholder Tree Growing for Rural Development and Environmental Services - page 301

From Eq. (14.5), the emission at time t from product i , We it , was computed as the
difference between the weight of carbon remaining after decay for time t-1 ( Wr i(t-1) )
and at the current time t ( Wr it ):

We Wr = − Wr

(14.5)

it i t ( − 1 it

Using the above relationships, the net carbon fixation at time t ( NCF t ) from plant-
soil system and product's end-use was calculated as:

NCF Cf Cw
t

=+ (14.6)

t t

By substituting Eq. (14.2) into (14.6), NCF t becomes:

n
=+

n

∑ r ∑

NCF Cf Ch − = We

t t i i it

i = 1 i 1

Appendix 2: Base Parameter Values Used in Cost-Benefit Analysis
of Alternative Land Use Systems, Claveria, Misamis Oriental, The
Philippines

Parameter Value Units Description Source

Labor requirements
L MD 103 MD/ha/year Man-day labor

requirements for maize
production

c

32 MAD/ha/year Man-animal labor

requirements for
maize production

L MAD c

L AP 22.8 MD/au/year Labor required for

tethering and
caring animal

a

L TP 9.6 MD/ha Labor for tree

planting

d, e

L PW 90.4 MD/ha Labor for pruning

and ringweeding trees,
twice per
year for first two years

d, e

L H 67.8 MD/ha Labor for harvesting timber

and post
harvest processing

d, e

L HL 13 MD/ha Man-day to layout hedgerow for

timber trees
component

c

(continued)