A Guide for Monitoring and Evaluating Population-Health-Environment Programs
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TiME frAME: Annually, or corresponding with crop/fish/product harvesting cycles.
dATA COllECTiOn COnsidErATiOns: The total area for all plots combined under each crop system
should be calculated and the yield determined for each cropping system. Separate yields should not
be calculated for each plot and combined. The denominator (total area planted for land or total area
fished for marine) can be measured by a transect survey for small areas; by aerial survey/photographs
for larger areas (i.e., flying over area to measure distances or use of satellite images); or by traveling the
distances by boat or via scuba diving for marine areas. At least one person experienced in this type of
measurement should be involved in the denominator measurements.
Many farmers/fishers likely already measure their crop/marine harvests and may already have accurate
measurements of the areas planted with specific crops or areas fished. It is possible that existing data
may be used. Farmer/fisher estimates may vary in accuracy. However, using the farmer/fisher estimate
method is generally simpler, less expensive and more efficient.
Data should also be collected on when specific crops or marine species are harvested throughout the
year. Data collection should occur early in each planting or fishing season to measure the area planted
or fished, and right after each harvest to measure yields.
sTrEnGTHs & liMiTATiOns: This indicator may not only provide data on the impact of the improved
resource practice but also serve as an incentive for farmers/fishers to continue with and expand on the
use of improved practices. Data are relatively easy and inexpensive to collect, especially since most
farmers/fishers already measure their yields. This indicator is widely used in the coastal resource man-
agement field and is sometimes called "catch per unit effort." However, external factors can affect the
yield. Improved natural resource management practices do not necessarily result in increased natural
resource yields.
Summary :
The denominator (total area planted for land or total area fished for marine) can be measured by a transect survey for small areas; Many farmers/fishers likely already measure their crop/marine harvests and may already have accurate measurements of the areas planted with specific crops or areas fished. Data collection should occur early in each planting or fishing season to measure the area planted or fished, and right after each harvest to measure yields.
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