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and measured dominate trees at regular intervals along the strips.
Height/age curves were drawn for trees in 32 different soils, and indexes of
capability were established for the various agricultural soils.
CANAL MAPPING
This phase of the work entailed locating, naming and mapping of this complex
irrigation system that had grown out of the unorganized efforts of farm owners to
provide their own canals from rivers.
The Project accomplished this work through a combination of photo interpreta
tion and field observation. The results are fully annotated on the 1:20,000
mosaics; more than 10,000 canals were mapped.
HYDROLOGY
Using information obtained from various government and private sources, a
summary and analysis were made to indicate the quantity of water available for
irrigation in the nine major river basins of the country.
The Project confined its studies to the months of the irrigation season, and
developed flow probability curves for the time of year when irrigation is
necessary in each area.
Detailed “Water Availability' 1 reports were prepared. River basin maps for
the principal rivers were compiled to show the location and date of record of all
first order gauging stations and data gathering sources.
METEOROLOGY AND CLIMATOLOGY
The Project gathered basic data and made meteorological and climatological
studies because of the importance of these factors in determining agricultural
land use capability.
The studies were aimed at compilation and presentation of information con
cerning the location of precipation gauging stations, the determination of annual
isohyets (lines connecting places having equal rainfall), the determination of
agricultural zones, periods of vegetation growth and seasons of the year for each
zone and the mapping of climate, agricultural and geographic zones, and the
necessity of irrigation.