Dorsett, Donald J.

Gray, Carl

Pennington, H. Dale

Welch, C. D.

English

Texas A&M University


SOIL, WATER AND FORAGE ANALYSIS
LABORATORY SERVICES
TEXAS AGRICULTURAL EXTENSION SERVICE
The Texas Agricultural Extension Service provides labo-
ratory services from three locations - College Station,
Lubbock and Seymour. This publication explains the types
of tests available at each location, fee schedule and general
type information reported.
SOIL FERTILITY TESTS (College Station, Lubbock, Seymour)
Basic soil fertility tests including pH, potassium, phos-
phorus and salinity hazard are available from all locations.
Also included are calcium and magnesium at College Station
and Lubbock. Sodium is included at Seymour and organic
matter is available on request from all locations. Nitrate
nitrogen is a routine test at Lubbock. Fee $4 per sample.
The above tests plus iron, zinc and manganese also are a-
vailable from Lubbock and College Station. Fee $7 per
sample. Information sheets and sampling instructions are a-
vailable from county Extension offices. D-494 and D-575 are
for field and forage crops; D-495 is for gardens, lawns, etc.
Reports include levels of available nutrients and suggested
fertilization for crops listed on the information sheet sub-
mitted with the sample.
IRRIGATION AND LIVESTOCK WATER TESTS (College
Station)
Irrigation water tests include electrical conductivity,
total salt, calcium, magnesium, potassium, sodium, car-
bonate, bicarbonate, sulfate, chloride and pH. Fee $8 per
sample. Additional optional tests: boron $3, nitrate 50
cents per sample. Information sheets and sampling instruc-
tions (D-617) are available from county Extension offices.
Salinity reports include a quality rating for irrigation water.
Suitability for livestock consumption is provided on request.
Prepared by C. D. Welch, Extension soil chemist; Carl Gray, Exten-
sion soil chemist (soil fertility-soil testing); H. Dale Pennington, area
Extension soil chemist; and Donald J. Dorsett, Extension forage spe-
cialist, The Texas A&M University System.
LNESTOCK WATER TEST (Lubbock)
This test includes total salt and nitrate. Fee $2 per sam-
ple. An evaluation based on test results is included in the re-
port.
SOIL SALINITY ANALYSIS (College Station)
Soil salinity analysis includes electrical conductivity (salt
index), total salt, calcium, magnesium, sodium and pH in a
saturated water extract. Information about the salinity ha-
zard or potential effects on plants is included with the re-
port. Fee $7 per sample. Information sheets and sampling in-
structions (D-6l6) are available from county Extension of-
fices. The report gives total salt level and salinity hazard for
different crops.
MINERAL ANALYSIS OF PLANTS (College Station)
Greenhouse tomato petiole samples can be analyzed for
up to nine elements (nitrogen, phosphorus, potassium, cal-
cium, magnesium, zinc, iron, manganese and copper). Fee
$14 per sample. Information sheets and sampling instructions
(D-752) are available from county Extension offices. The re-
port gives nutrient levels as percen tages or parts per million
and indicates relation to critical levels. Also included is a rat-
ing to show if the plants are adequate or deficient in each
nutrient.
Pecan leaf samples also can be analyzed for zinc. Fee
$4 per sample. Information sheets and sampling instructions
(D-746) are available from county Extension offices. Results
are reported as parts per million elemental zinc on an oven
dry basis.
FORAGE TESTING (College Station)
Forage tests available include protein, fiber and mineral
analysis according to the following fee schedule. Information
sheets and sampling instructions (D-lll6) are available from
county Extension offices.
A standard preparation fee of $2.50 is added once for
each sample regardless of the number of determinations re-
quested. For example, group 1 would cost $5.50 or a com-
plete analysis would be $21.
Group 1 - $3 Group 2 - $5 Others
Phosphorus Zinc Crude protein $2.50
Potassium Manganese Nitrate 3.00
Calcium Copper Fiber (ADF) 5.00
Mawesium Sodium
The report includes analytical results as percentages or
parts per million. A forage quality evaluation is included
when requested.
For more information about soil fert~1ity tests, salinity
or forage tests, contact your county Extension office.
Educational programs conducted by the Texas Agricultural Extension
Service serve people of all ages regardless of socio-economic level,
race, color, sex, religion or national origin.
Cooperative Extension Work in Agriculture and Home Economics,
The Texas A&M University System and the United States Department
of Agriculture cooperating. pistributed in furtherance of the Acts of
Congress of May 8, 1914, as amended, and June 30,1914.
lOM-11-80 AGR 13-5


Soil, Water and Forage Analysis Laboratory Services.

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Soil, Water and Forage Analysis Laboratory Services.

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