Suchergebnisse

The Pakistan Agricultural Sector Model (PASM) developed by
Davies et al. (1991) was modified to enhance the livestock sub-sector.
Nutrient-based rations replaced feedstuff-based rations and dry matter
minimum and maximum constraints (stomach capacity) were added. Several
initial simulations were undertaken to examine the structure of the
modified model and its impact across the crop and livestock sub-sectors.
These simulations included relaxing exogenous livestock numbers and
selected crop hectarage constraints, and requiring that green forage be
fed in the season grown. Most importantly, the results demonstrated that
fodder hectarage will grow with livestock numbers to insure that
sufficient green forage is available seasonally. Two other analyses were
performed to demonstrate the need to specify linkages between the crop
and livestock sub-sectors. An analysis of transforming the livestock
sub-sector from traditional to feedlot-based technology demonstrated
that the reduced numbers of non-milking cattle needed for a given output
of meat would provide the potential for increased production of various
crops and other livestock products. Also, expanded cotton and Irri rice
exports, hypothesised to occur through trade liberalisation from the
Uruguay Round of the GATT, highlighted other inter-relationships between
the crop and livestock sub-sectors. Greater production of both livestock
and other crops might accompany the expansion of cotton production but
less livestock feed would be available with expanded exports of Irri
rice.