WSP10974

• File Number: 8220.143.J
• Description: Smith Fork ‎(Crawford)‎ Project
• State: CO
• Basin: Gunnison
• Water Division: 4
• Date: 5/1/1958
• Author: Dept of Agriculture
• Title: Report of Reappraisal of Direct Agricultural Benefits and Project Impacts-Smith Fork Project
• Water Supply Pro - Doc Type: Report/Study

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C Projected Crop Yields

Eight basic projected crop yield levels are used (table 7). These levels
represent future production rates 'with' and 'without' the project for
evaluation': areas A, B, C, D, and E. Projected" crop yields are based upon
secondary data relating to crop yields in the general area, farmers estimates
of crop yields for the years 1956 and 1957, and their estimates of probable
yields 'with' the project obtained during the field survey. In addition,
the experience and judgement of extension and research workers in agronomy,
soils, irrigation, and economics were drawn upon in estimating future yields.
In making these estimates it was assumed that there would be a general
improvement in farming practices, particularly in the adoption of better
crop rotations, improved timing of farm operations, greater use of fertilizer
and improvement in the management of water.

Table 7.- Projected crop yields 'with' and 'without' the project, by evaluation
areas, Y Smi th Fork project

: Without project 5/
.
. evaluation areas
Item Unit :
. A B : C : D . E :Weighted:
. .
. : : : . : average :
. .

Wi th project 11
evaluation areas

:

.
.

E :Weighted
: : average

A : B : C : D

Weighting Percent 23.0 29.0 39.0 --- 9.0 100.0 22.0 27.0 37.0 6.0 8.0 100.0

Alfalfa Ton 2.5 2.4 2.1 2.5 2.3 3.3 3.4 3.0 3.1 2.8 3.2
Other hay Ton 1.8 1.5 1.3 1.8 1.5 2.5 2.3 2.0 2.1 2.1 2.2
Rotation
pas ture AUM 4.0 4.0 3.5 4.0 3.8 6.0 6.0 5.5 5.6 4.6 5.7
Corn silage Ton 9.0 10.0 8.0 9.0 8.9 12.0 13.0 11.O 11.5 10.0 11.7
Barley Bushel 50.0 45.0 40.0 --- 5.0 44.6 60.0 55.0 50.0 51.0 58.0 54.2
.. W
Permanent
pasture AUM 2.0 2.0 1.5 1.5 2.0 1.8 2.0 2.0 1.5 1.5 2.0 1.8

Y Two hundred and fifty acres of arable land included in evaluation area E are
projected to receive essentially the same supply of water 'with' and 'without'
the project.i
51 Fertilizer: Sufficient manure produced on farms to maintain projected yields.
11 Fertilizer: Annual rate; alfalfa, 30 pounds available P20$ or equivalent manure
per acre; rotation pasture, 20 pounds P205 and 20 pounds N, barley, follOWing
corn or barley, 20 pounds N. Total P205 required applied at time of seeding.
Nitrogen applied annually.
W Projected to receive essentially the same supply of water 'with' and 'without'
the project. \

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