SWRHL-104r
AGRONOMIC ASPECTS OF THE EXPERIMENTAL DAIRY FARM
DURING 1969
by
Edgar M. Daley
Radiological Research Program
Western Environmental Research Laboratory
ENVIRONMENTAL PROTECTION AGENCY
Published July 1971
This study performed under a Memorandum of
Understanding (No. SF 54 373)
for the
U.S. ATOMIC ENERGY COMMISSION
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This report was prepared as an account of work sponsored
by the United States Government. Neither the United States
nor the United States Atomic Energy Commission, nor any of
their employees, nor any of their contractors, subcontrac-
tors, or their employees, makes any warranty, express or
implied, or assumes any legal liability or responsibility
for the accuracy, completeness or usefulness of any infor-
mation, apparatus, product or process disclosed, or repre-
sents that its use would not infringe privately-owned rights.
Available from the National Technical Information Service,
U. S. Department of Commerce,
Springfield, Va. 22151
Price: paper copy $3.00; microfiche $.95
024
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SWRHL-104r
AGRONOMIC ASPECTS OF THE EXPERIMENTAL DAIRY FARM
DURING 1969
by
Edgar M. Daley
Radiological Research Program
Western Environmental Research Laboratory*
ENVIRONMENTAL PROTECTION AGENCY
Published July 1971
This study performed under a Memorandum of
Understanding (No. SF 54 373)
for the
U.S. ATOMIC ENERGY COMMISSION
*Formerly Southwestern Radiological Health Laboratory, part of the U. S.
Department of Health, Education, and Welfare, Public Health Service,
Environmental Health Service, Environmental Control Administration,
Bureau of Radiological Health.
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ABSTRACT
This report is one of a succession of annual reports on the agronomy
practices of the experimental dairy farm at the Nevada Test Site.
The report includes a narrative report and accompanying tables on
irrigation, fertilization, crop production, and meteorological
data during the year 1969.
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TABLE OF CONTENTS
Page
ABSTRACT ""
LIST OF FIGURES i"
INTRODUCTION ]
AGRONOMY PRACTICES 4
A. Irrigation 4
B. Fertilization 4
C. Crops 6
AGRONOMIC COMPARISONS WITH ADJACENT AREAS 10
FIELD EXPERIMENTS 11
MICROPLOTS 11
REFERENCES 12
APPENDICES 13
DISTRIBUTION
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LIST OF FIGURES
Figure Page
1, Location of Environmental Protection Agency facilities 2
on the Nevada Test Site.
2. Crop lands and buildings of the experimental 3
dairy farm
3. Gallons of irrigation water applied monthly for 5
1968 and 1969
4. Forage production from 1966 through 1969 8
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INTRODUCTION
The Western Environmental Research Laboratory (WERL) of the Environmental
Protection Agency, formerly the Southwestern Radioloqical Health Labora-
tory, U. S. Public Health Service, maintains and operates an experimental
dairy farm on the Nevada Test Site (NTS) with the U. S. Atomic Energy
Commission.
The experimental farm is located in Area 15 of the NTS which is approxi-
mately 110 miles from WERL (see Figure 1). The farm is situated in a
high desert valley (elevation 4,500 feet). The soil is a coarse,
gravelly, sandy loam with cobbles intermixed. The soil has a pH of 8.5.
The physical description and history of the farmstead are described in
(1 2)
reports previously publishedv ' .
The farm is maintained to support the dairy herd used in experiments
and provide crops for other studies conducted bv the Radiological
Research Program (RRP).
This report is one of a succession of reports of the agronomy practices
of the farm for the year 1969 with certain comparisons to prior years
practices. The report is compiled from monthly reports written from
daily sheets kept by the Crop Research Helpers. These records document
the practices on the farm and supply the information that can be used
in support of controlled release experiments or in "Ad Hoc" studies that
may be conducted following a radioactive release from nuclear explosive
tests or reactor tests conducted at the NTS or Nuclear Reactor Development
Station.
The crop area consists of 16 acres which are divided into 17 plots or lands
by the irrigation laterals. Each of the end lands has an area of approxi-
mately one-half acre, while the remaining 15 lands each contain one acre.
Figure 2 shows the crop lands and buildings of the experimental dairy farm.
1
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EXPERIMENTAL FARM
BUFFER ZONE
I NRDS
BUFFER I
ZONE
• MERCURY
I
LAS VEGAS
65 MILES
5 10
m^^mmmtmm
SCALE IN MILES
Figure 1. Location of Environmental Protection Aaencv facilities on
the Nevada Test Site.
2
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TRANSFORMER STATION
CO
BOUNDARY OF EPA USE AREA
SCALE: i" = 200'
BOUNDARY OF FENCED AREA-
Fiqure 2. Crop lands and buildings of the Experimental Dairy Farm.
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AGRONOMY PRACTICES
A. Irrigation
The irrigation system was installed in the fall of 1964. It consists
of a centrifugal pump mounted on the north bank of the reservoir, a
900-foot main line, and sixteen 770-foot laterals connected to the main
line at right angles. The laterals are 3-inch O.D. steel pipes spaced
approximately 60 feet apart. Each lateral has Rainbird Model 40 B
sprinkler heads spaced approximately 40 feet apart and mounted 20 inches
above the laterals on 3/4-inch galvanized pipe risers. The water flow
through each lateral is controlled by a gate valve located just off the
main line.
The irrigation season was from March through November, with peak usage
in August. The amount of water applied was 84.4 acre-feet (325,850
gallons equals one acre-foot) with an average of 5.2 acre-feet per land.
Appendix I lists amounts of irrigation water applied by months to each
land.
During 1968, 93.9 acre-feet with an average of 5.8 acre-feet per land
were used. The 1968 irrigation started a month earlier. The amount
of water applied to the total crop land during each month for the years
1968 and 1969 is shown in gallons vs. months in Figure 3.
B. Fertilization
During this reporting period the only nutrients applied were nitrogen
and phosphorus. The sources of the nutrients are ammonium sulfate
(21-0-0)* containing 21% nitrogen and treble super phosphate (0-45-0)
containing 45% PoOj-.
*Amount of nutrient expressed in pounds of nutrient in 100 pounds of
material. N = Nitrogen, P205 = Phosphorus, K20 = Potash (N-P205-K20).
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6.00^
to
-s
CD
CO
—' CD
tO G>
O1 —'
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Phosphorus is the primary nutrient requirement of legumes. This is
usually applied during the winter months as a top dressing for the
crops. Phosphorus is also applied to small grains as a preplant
fertilizer to aid in the development of a good root system.
Nitrogen is required for small grains and grasses for plant growth.
Nitrogen is applied as a top dressing during the growing season and
as a preplant application on small grains.
In southern Nevada the alfalfa yields are lowered by what is referred
to as "midsummer slump." Split application of phosphorus is used by
some operators to overcome this and has reportedly increased their
yield. The practice consists of applying half of the fertilizer in
the winter and the other half after the first cutting.
A fertilizer demonstration experiment was conducted at the farm to
determine if this procedure would increase forage production. A
single application of treble super phosphate was applied to alfalfa
at the rate of 180 Ibs/A P205 (78 Ibs/A P) on March 5. Split applica-
tions of 90 Ibs/A P205 (39 Ibs/A P) to an identical plot of alfalfa
were made on March 5 and June 11. The second application followed
the first cutting of alfalfa. The difference in yields between the
split application and the single application plots was insignificant
and does not warrant the extra time and labor required for two
applications.
The amounts of fertilizer expressed in pounds of nutrients applied
to each land are recorded in Appendix II.
C. Crops
Green chop harvesting of winter rye began on April 4. Three varieties
of rye (Secale cereale) were planted in October of 1968 on Lands 15, 16,
and 17. These were Balboa, Elbon, and Oregon common. Elbon is the
most winter-hardy of the varieties planted.
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The alfalfa stand was established in September 1965. The first
alfalfa green chop was harvested April 17. The first cutting of
alfalfa hay was baled on May 14. Each land produced from four to five
cuttings of alfalfa hay.
Although other areas of southern Nevada (Virgin Valley and Moapa
Valley) reported severe insect damage, none was noted at the farm.
This is probably due to isolation, altitude, agricultural practices
(leaving short stubble on alfalfa), the cold winter, and use of
resistant varieties.
During 1969, 85 ton of hay and 159 ton of green feed were produced
over a 211-day growing and harvesting period. The yields for the
1968 season were 117 ton of green feed and 63 ton of hay over a
220-day harvesting period. See Figure 4 and Appendix III (a and b)
for comparison and production.
The average hay production on 13.5 acres was 6.3 ton per acre.
Average production of green chop per acre on 16 acres was 9.9 ton.
The average production for 1968 was 4.4 ton of hay and 6.6 ton of
green chop per acre.
Lands 15, 16, and 17 were fallow during July, August and September
of 1969.
During the year the temperatures at the farm ranged from an average
low of 28.1°F to an average high of 89.2°F, resulting in a growing
season of 211 days from April 4 to November 1.
Snow storms occurred during the winter with a maximum single
accumulation of snow of approximately 18 inches. Winter rain storms
accounted for the greater than average 5 to 6 inches of precipitation.
The total amounts for the month and number of days precipitation
occurred are listed in Appendix IVa.
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17O
16O-
15O
14O -
13O -
120 -
11O
1OO -
9O
z
o
Q.
O
I
U
Z
LJJ
UJ
ir
0
1966 1967 1968 1969
Figure 4. Forage production from 1966 through 1969.
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Mechanical and chemical weed control is practiced throughout the year.
At the farm there were no hard-to-control noxious weeds such as Russian
knapweed, Canadian thistle, or bindweed. The noxious weeds, Russian
thistle, primrose, and pigweed are present and kept under control by
employing both chemical and mechanical methods of weed control. In
order to prevent the introduction of noxious weeds, only certified
seed is used.
Mechanical weed control consisted of scraping the soil surface of the
non-crop area within the farm compound area with a tractor rear-mounted
blade. Hand hoeing was employed in the vegetable crops of the micro-
plots. The fallow lands were disced with a disc harrow during the
summer to control the weeds.
Herbicides used for weed control were 2, 4-D and Paraquat.* The areas
around the sprinkler heads, gate valves, fence rows and along the
irrigation laterals were controlled by spraying with either a hand
sprayer or tractor-mounted sprayer, depending on the size of the area
to be sprayed. The herbicide material is put in water and a spreader
added to make up the spray solution.
On October 2, Lands 15, 16, and 17 were planted with winter rye
(Secale cereale) Elbon variety at 100 pounds per acre. Excellent
germination resulted and there was a thick dense stand of rye. Elbon
rye was selected because of its winter-hardiness.
*Paraquat-Chevron Chemical Company, Ortho Division.
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AGRONOMIC COMPARISONS WITH ADJACENT AREAS
The procedures practiced on the experimental farm follow recommended
practices or duplicate actual practices used by commercial farmers of
this general geographic area. Direct comparisons of yield, fertilization
needs, and water requirements are difficult as the farm is isolated
and not part of the specific farming area. Each area has its unique
characteristics that influence the agronomic practices and determine,
to a great extent, crop yields. Some of these characteristics are
fertility, soil pH, soil type and depth, organic matter content,
altitude and length of growing season, amount of precipitation, and
quality of irrigation water, etc.
A 1964 survey of the Pahrump, Nevada, farming community (70 miles
south of the farm) revealed that the average annual production of
alfalfa hay from established fields was eight ton per acre produced
in six cuttings. The farm production in 1969 was 6.3 ton per acre
produced in four cuttings plus 9.9 ton of alfalfa green chop per
(4)
acre
The University of Nevada Extension Service estimates that alfalfa grown
in southern Nevada requires 7.5 acre-feet of water per acre per year.
Small grains for the area require 3.5 acre-feet of water per acre per
year. Irrigation at the experimental farm for 1969 was 5.7 acre-feet
per acre per year on the alfalfa and 3.5 acre-feet per acre per year
(5\ J
for the small grain v .
The average production of rye green chop from 1956-1961 on the
University of Nevada Agricultural Experimental Station, Logandale,
Nevada (100 miles southeast of the farm) was 4.4 ton per acre dry
weight or approximately 9 ton per acre wet weight. Area 15 production
averaged 7.5 ton per acre wet weight in 1969
10
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FIELD EXPERIMENTS
There were two experiments involving the controlled release of radioiodine
(Project Take Up, August 15, Land 12 and Project Retake, September 8,
Land 11) conducted on the farm. Both experiments utilized aerosols of
diatomaceous earth of two different particle sizes which were tagged
with Na131I and elemental 131I2 generated over growing alfalfa.
Neither of these experiments included any feeding of contaminated feed
to the dairy cows. The experiments were designed to determine the rate
of binding and the effective half-life for three different artificial
131I contaminants.
Results of these experiments will be published separately.
MICROPLOTS
The microplots are located adjacent to the northeast corner of the farm.
The area is approximately two acres of irrigated farm land of the same
soil type and pH as the farm. These plots are used to conduct studies of
plant uptake in small grains and vegetable crops and movement in the soil
of long-life isotopes. Results of these experiments will be published
separately.
11
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REFERENCES
Daley, E. M. and D. D. Smith. Agronomic Aspects of the Experimental
Dairy Farm - January 1966 - December 1968. SWRHL-63r. Southwestern
Radiological Health Laboratory. Las Vegas, Nevada. August 1969
Douglas, R. L. Status of the Nevada Test Site Experimental Farm
Summary Report - July 1964 - December 1965. SWRHL-36r. Southwestern
Radiological Health Laboratory. Las Vegas, Nevada. January 1967
Daley, E. M. Pahrump Valley Report. Report to the files. South-
western Radiological Health Laboratory. Las Vegas, Nevada. 1964
Fogel, M. M. and G. A. Myles. Pumping from irrigation wells. Max C.
Fleischmann College of Agriculture. University of Nevada. Bulletin
110. Reno, Nevada. July 1962
Robinson, G. D., E. H. Jensen, and H. P. Cords. Cereals for forage
in Southern Nevada Agricultural Experimental Station. Max C.
Fleischmann College of Agriculture. University of Nevada. Bulletin
231. July 1963
Hughes, H. D., M. E. Heath, and D. S. Metcalfe. Forages - The Science
of Grassland Agriculture. The Iowa State University Press. Ames,
Iowa. 1966
12
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APPENDICES
APPENDIX Page
I. Tabulation of Monthly Irrigation by Land 14
During 1969
II. Tabulation of Fertilizer Applied to Each 15
Land January - December 31, 1969
Ilia. Crop Production During 1969 16
Hay production by lands
IIIb. Crop Production During 1969 17
Green chop production by lands
IVa. Summary of the Meteorological Data from 18
Area 15 Farm. (Temperature data)
IVb. Summary of the Meteorological Data from 19
Area 15 Farm. (Precipitation data)
13
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APPENDIX I. Tabulation of Monthly Irrigation by Land During 1969.
The amount of irrigation water applied per land and month is expressed in acre-inches (an acre inch = 27,154 gallons)
The year's total per land is written in acre inches per year and acre feet (an acre foot = 325,850 gallons) per year.
Lands
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Total
Acre
Ins.
Total
Acre
Feet
1
0
0
0
2.9
7.3
11.9
16.8
15.7
8.1
5.8
0
0
68.5
5.7
2
0
0
0
6.4
9.7
6.1
10.4
11.4
10.2
5.0
0
0
59.2
4.9
3
0
0
0
6.4
9.7
12.6
10.4
11.4
8.1
5.0
0
0
63.6
5.3
4
0
0
0
7.2
11.9
7.8
12.5
8.9
8.1
7.2
0
0
63.6
5.3
5
0
0
0
8.4
10.9
10.2
10.4
7.5
10.2
7.2
0
0
64.8
5.4
6
0
0
0
7.6
7,7
8.2
10.4
16.0
11.8
6.4
0
0
68.1
5.6
7
0
0
0
7.3
9.2
10.0
16.2
18.4
12.8
4.1
0
0
78.0
6.5
8
(Acre-i
0
0
0
7.3
11.4
4.1
18.1
16.2
8.4
8.6
0
0
74.1
6.1
9
nchesl
0
0
0
6.7
10.9
8.0
16.8
9.1
10.4
8.6
0
0
70.5
5.8
10
)
0
0
0
6.1
8.1
10.6
19.1
14.8
12.0
8.6
0
0
79.3
6.6
n
0
0
0
7.0
9.0
10.5
17.4
11.4
7.5
10.0
0
0
72.8
6.0
12
0
0
0
9.8
9.0
10.4
9.7
11.8
10.6
7.6
0
0
68.5
5.7
13
0
0
.7
10.6
14.6
14.2
6.5
11.8
11.2
4.3
1.1
0
75.0
6.2
14
0
0
.7
10.6
9.8
5.5
9.0
12.0
10.6
4.3
1.1
0
63.6
5.3
15
0
0
.7
7.0
2.3
0
0
2.0
6.0
4.3
1.1
0
23.2
1.9
16
0
0
.7
10.6
2.2
0
0
2.0
6.0
3.3
1.1
0
25.9
2.1
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APPENDIX II. Tabulation of Fertilizer Applied to Each Land January - December 31, 196g.
Fertilizer is expressed in pounds of actual nutrients applied, i.e., N represents nitrogen, P205 represents phosphorus
Lands 123456789
Date of
Application
March 5
June 11
90#P00C
L b
180#P00C
L b
90#P0
90#P00C
d. b
Lands
10
11
12
13
14
15
16
17
Date of
Application
March 5
April 9
May 27
July 8
October 2
2
42#N
48#N
42#N
225#POt
90#P00,-
c. b
48#N
42#N
.,
c. b
48#N
25#N
32#N
48#N
25#N
32#N
36#P90,-
60
25#N
16#N
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APPENDIX Ilia. Crop Production During 1969.
Hay production by lands(expressed in tons).
Lands
May
Jun
Jul
Aug
Sep
Total
1 2 3
0.75 2.25 2.25
1.50 1.50
1.50 1.50
1.50 1.50
1.75
0.75 6.75 8.50
4
2.25
1.50
1.75
1.50
1.75
8.75
5 6
2.25
1.75
3 1.75
1 1
8 2.75
7
2.25
1.50
3.75
Lands
May
Jun
Jul
Aug
Sep
Oct
Total
8 9 10
2.75 3 2.25
1.75 2 1.50
1.50 1.75
1.25 1.25 1.25
1.75 1.75
9 9.75 5
11
2.25
2
1.50
1.50
1.50
8.75
12 13
2.25 0.75
1.75
1.50
2.25 1.50
1.50
9.25 2.25
14
2.25
2.25
Total hay production for the year was 85 ton.
16
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APPENDIX Illb. Crop Production During 1669.
Green chop production by lands (expressed in tons).
Lands
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Totals
Lands
Apr
May
Jun
Jul
Aug
Sep
Oct
Totals
1 2 3
1.50
5
1.50
4 3.25
2.25 2.50
2.75 4.25
17 10
10 11 12
2
5.25
5.25
12.50
4
3.25
3.25
13
6.50
5.50
4.50
3.25
3.25
23
5
5.50
1.25
.50
7.25
14
5.75
3.50
3.75
1.50
2
16.50
6
4.50
5.50
7.50
4
2.25
5.75
1.25
.50
31.25
15
2.75
4.50
7.25
789
8
2.50
1.75
1.50 1.50 1.25
13.75 1.50 1.25
16 17
2.75 2.75
7.25 2.00
10 4.75
Total green chop production for the year was 159 ton.
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APPENDIX IVa. Summary of the Meteorological Data from Area 15 Farm.
(Temperature data)
The temperatures are the means and the extremes for the months of 1969.
Temperatures are expressed in degrees Fahrenheit.
Means Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High 49.8 45.3 53.5 67.1 79.9 79.6 88.9 89.2 79.7 62.1 57.6 51.5
Low 31.5 29.7 31.1 40.7 51.2 54.3 60.9 62.2 53.3 37.3 34.0 28.1
Extremes Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High
Low
70
18
56
20
77
18
79
29
91 90
38 45
94
54
95
52
90
47
79
26
70
22
61
18
18
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APPENDIX IVb. Summary of the Meteorological Data from Area 15 Farm.
(Precipitation data)
The precipitation is the total for the month and the total for the year.
The amount of precipitation was higher than normal for the Area 15 Farm
during this period. The high months were during the winter non-growing
season.
Precipitation is expressed in inches.
Month
January
February
March
Apri 1
May
June
July
August
September
October
November
December
Total
for year
Total for
month
3.69
2.78
.35
.20
.19
.82
1.15
.59
.14
.04
.60
.01
10.56
Number of days precipitation
occurred
10
13
3
4
1
5
6
4
2
2
4
1
55
19
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DISTRIBUTION
1-20 WERL, Las Vegas, Nevada
21 Robert E. Miller, Manager, NVOO/AEC, Las Vegas, Nevada
22 Robert H. Thalgott, NVOO/AEC, Las Vegas, Nevada
23 A. Dean Thornbrough, NVOO/AEC, Las Vegas, Nevada
24 Henry G. Vermillion, NVOO/AEC, Las Vegas, Nevada
25 Donald W. Hendricks, NVOO/AEC, Las Vegas, Nevada
26 Elwood M. Douthett, NVOO/AEC, Las Vegas, Nevada
27 Jared J. Davis, NVOO/AEC, Las Vegas, Nevada
28 Ernest D. Campbell, NVOO/AEC, Las Vegas, Nevada
29-30 Technical Library, NVOO/AEC, Las Vegas, Nevada
31 Chief, NOB/ DNA, NVOO/AEC, Las Vegas, Nevada
32 Joseph J. DiNunno, Office of Environmental Affairs, USAEC, Washington, D. C.
33 Martin B. Biles, DOS, USAEC, Washington, D. C.
34 Roy D. Maxwell, DOS, USAEC, Washington, D. C.
35 Assistant General Manager, DMA, USAEC, Washington, D. C.
36 Gordon C. Facer, DMA, USAEC, Washington, D. C.
37 John S. Kelly, DPNE, USAEC, Washington, D. C.
38 Fred J. Clark, Jr., DPNE, USAEC, Washington, D. C.
39 John R. Totter, DBM, USAEC, Washington, D. C.
40 John S. Kirby-Smith, DBM, USAEC, Washington, D. C.
41 L. Joe Deal, DBM, USAEC, Washington, D. C.
42 Charles L. Osterberg, DBM, USAEC, Washington, D. C.
43 Rudolf J. Engelmann, DBM, USAEC, Washington, D. C.
44 Philip W. Allen, ARL/NOAA, Las Vegas, Nevada
45 Gilbert J. Ferber, ARL/NOAA, Silver Spring, Maryland
46 Stanley M. Greenfield, Assistant Administrator for Research and Monitoring,
EPA, Washington, D. C.
47 Joseph A. Lieberman, Acting Commissioner, Radiation Office, EPA,
Rockville, Maryland
48 Paul T. Tompkins, Acting Director, Division of Criteria and Standards,
Radiation Office, EPA, Rockville, Maryland
49-50 Charles L. Weaver, Acting Director, Division of Surveillance and Inspection
Radiation Office, EPA, Rockville, Maryland
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51 Ernest D. Harward, Acting Director,, Division of Technoloay Assessment,
Radiation Office, EPA, Rockville, Maryland
52 William A. Mills, Acting Chief, Radiation Research Division, Research ft
Monitoring Office, EPA, Rockville, Maryland
53 Bernd Kahn, Radiological Engineering Laboratory, EPA, Cincinnati, Ohio
54 Interim Regional Coordinator, Region IX, EPA, San Francisco, California
55 Eastern Environmental Radiation Laboratory, EPA, Montgomery, Alabama
56 William C. King, LRL, Mercury, Nevada
57 Bernard W. Shore, LRL, Livermore, California
58 James E. Carothers, LRL, Livermore, California
59 Roger E. Batzel, LRL, Livermore, California
60 Howard A. Tewes, LRL, Livermore, California
61 Lawrence S. Germain, LRL, Livermore, California
62 Paul L. Phelps, LRL, Livermore, California
63 William E. Ogle, LASL, Los Alamos, New Mexico
64 Harry J. Otway, LASL, Los Alamos, New Mexico
65 George E. Tucker, Sandia Laboratories, Albuquerque, New Mexico
66 Wright H. Langham, LASL, Los Alamos, New Mexico
67 Harry S. Jordan, LASL, Los Alamos, New Mexico
68 Arden E. Bicker, REECo, Mercury, Nevada
69 Clinton S. Maupin, REECo, Mercury, Nevada
70 Byron F. Murphey, Sandia Laboratories, Albuquerque, New Mexico
71 Melvin L. Merritt, Sandia Laboratories, Albuquerque, New Mexico
72 Richard S. Davidson, Battelle Memorial Institute, Columbus, Ohio
73 R. Glen Fuller, Battelle Memorial Institute, Las Vegas, Nevada
74 Steven V. Kaye, Oak Ridge National Laboratory, Oak Ridge, Tennessee
75 Leo K. Bustad, University of California, Davis, California
76 Leonard A. Sagan, Palo Alto Medical Clinic, Palo Alto, California
77 Vincent Schultz, Washington State University, Pullman, Washington
78 Arthur Wallace, University of California, Los Angeles, California
79 Wesley E. Niles, University of Nevada, Las Vegas, Nevada
80 Robert C. Pendleton, University of Utah, Salt Lake City, Utah
81 William S. Twenhofel, U. S. Geological Survey, Denver, Colorado
82 Paul R. Fenske, Teledyne Isotopes, Palo Alto, California
83-84 DTIE, USAEC, Oak Ridge, Tennessee (for public availability)
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85 D. S. Earth, Director, Bureau of Air Pollution Sciences, Research Triangle
Park, North Carolina
86 Ferren Bunker, Clark County Cooperative Extension Service, Las Vegas, Nevada
87 Harold Guenther, Extension Agronomist, University of Nevada, Reno, Nevada
88 Gayland Robinson, Superintendent, Logandale Experiment Station, University
of Nevada, Logandale, Nevada
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