WSP08945

• File Number: 8030
• Description: Section D General Compact Issues - US Water Resources Council
• State: CO
• Basin: Statewide
• Date: 12/1/1971
• Author: US Water Resources C
• Title: Summary - Obers Review Meetings - Held July 1971 - RE-Economic Activity in the US by Water Resources Region and Subarea-Historic and Projected-1929-2020
• Water Supply Pro - Doc Type: Report/Study

002931.

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extrapolating historical trends. Net exports are computed from estimates

of imports and exports, and generally reflect a declining ~hare of total

U.S. production. These export levels are predicated on the current outlook

for U.S. trade policies. Projected feeding efficiencies dnd feeding rates

for various livestock types are an important element in the national frame-

work, since feeding rates and projected livestock production determine the

requirements for feed grains, high protein feed, and roughages. Little
change from current feeding efficiencies was projected to 1980, and.only

moderate improvement was projected from 1980 to 2020.

The second input subsystem--Projected Agricultural Resource Base--

develops a land inventory from which the projected agricultural resource

base is developed. The inventory was compiled at a soil capability class-

subclass level (SRG) within a geographic area (LRG) level. Land Resource
Groups are geographic areas with similar topographical features, climatic

conditions, farming types, and cropping patterns and are considered to be

the appropriate geographic units for analysis. Soil Resource Groups (SRG)

are defined in terms of the Soil Conservation Service'sclass~subclass

designation and include an additional code to reflect an irrigated or non-

irrigated status. SRG's are intended to reflect variations in productivity

of various soil types within an LRG. The land inventory data were taken

from two sources. Type I studies for which data were available and a

special survey of sample counties. Type I studies from which land inventory

data were derived include .the Missouri, Columbia-North Pacific, Ohio, Upper
Mississippi, and North Atlantic regions. Sample county data for the remaining

areas of the United States were collected with the assistance.of the Soil

Conservation Service. The total inventory provides a measure of the rela-

tionship of the cropping patterns and yields by Soil Resource Groups within

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