ASTM E550-87(2008)
(Guide)Standard Guide for Preparing Granular Pesticide Ground Applicator Calibration Procedures
Standard Guide for Preparing Granular Pesticide Ground Applicator Calibration Procedures
SIGNIFICANCE AND USE
This guide covers the calibration of row, band, and broadcast applicators. Attainment of accurate and more uniform application can reduce the quantity of active ingredient required for a given degree of control, thus improving environmental quality and safety at a more economical cost. A single-calibration procedure applicable in all situations is not feasible because of the nature of the variables involved in chemical applications.
SCOPE
1.1 This guide is for those who prepare granular pesticide ground applicator calibration procedures. The purpose is to encourage methods that will improve uniformity and accuracy of application with granular applicators.
1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements see Section 4.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E550 − 87(Reapproved 2008)
Standard Guide for
Preparing Granular Pesticide Ground Applicator Calibration
Procedures
This standard is issued under the fixed designation E550; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.4 Weighing Device—A scale for weighing granules in
grams (or ounces) or kilograms (or pounds).
1.1 This guide is for those who prepare granular pesticide
ground applicator calibration procedures. The purpose is to
4. Hazards
encourage methods that will improve uniformity and accuracy
4.1 A cautionary statement for the safe handling of agricul-
of application with granular applicators.
tural chemicals shall be included with applicator calibration
1.2 The values stated in SI units are to be regarded as
procedures.
standard. The values given in parentheses are mathematical
5. Recommendations
conversions to inch-pound units that are provided for informa-
tion only and are not considered standard. 5.1 The amount of granular material applied to a given area
is dependent on six factors. It is recommended that each of the
1.3 This standard does not purport to address all of the
following variables be given consideration when developing
safety concerns, if any, associated with its use. It is the
specific calibration procedures:
responsibility of the user of this standard to establish appro-
5.1.1 Orifice Area—The area of the metering orifice must be
priate safety and health practices and determine the applica-
adjustedtoregulatetheflowrate.Theorificeareaisdetermined
bility of regulatory limitations prior to use. For specific hazard
by the orifice setting. Adjustments in the orifice setting should
statements see Section 4.
always be made in one direction only such as from closed to
open to reduce variability in output for a particular setting.
2. Significance and Use
5.1.2 Ground Speed—A constant speed of the applicator
2.1 This guide covers the calibration of row, band, and
must be maintained for uniform application.
broadcast applicators. Attainment of accurate and more uni-
NOTE 1—The flow of granules through the orifice is not necessarily
form application can reduce the quantity of active ingredient
proportional to ground speed, even on applicators that use a rotor whose
required for a given degree of control, thus improving envi-
speed varies with ground speed.
ronmental quality and safety at a more economical cost. A
5.1.3 Product—Each agricultural chemical applied requires
single-calibration procedure applicable in all situations is not
a separate calibration since there is a wide variation in size,
feasible because of the nature of the variables involved in
density, and shape of the granules. In addition, the nature of the
chemical applications.
inert materials varies.
3. Apparatus 5.1.4 Width of Treatment—Calibration procedures should be
used to determine the amount in kilograms (or pounds) applied
3.1 Apparatus needed will depend on the method of cali-
per unit area of surface in hectares (or acres) actually covered
bration. Common equipment items include the following:
with the agricultural chemical. For band application, the area
3.1.1 Measuring Device—Tape of at least 25 m (50 ft) in
actually treated is the area in the band and not the area of
length, or other suitable measuring device.
cropland covered. Some row crop recommendations are based
3.1.2 Marking Devices—Stakes or flags for marking a
on treating “in-the-row” rather than the area actually covered.
measured course.
In these cases, recommendations are generally based on the
3.1.3 Containers—Paper, cloth, or plastic bags to collect
amount of granules per row length (grams per 100 m or ounces
granules.
per 1000 ft of row).
5.1.5 Rotor Speed—Consult the manufacturer’s literature
for recommended rotor speeds that will give maximum effi-
This guide is under the jurisdiction ofASTM Committee E35 on Pesticides and
Alternative Control Agentsand is the direct responsibility of Subcommittee E35.22
ciency.
on Pesticide Formulations and Delivery Systems.
5.1.6 Climatic Conditions—Calibration adjustments must
Current edition approved Oct. 1, 2008. Published November 2008. Originally
be made for changes in flow due to temperature and humidity
approvedin
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