University of FloridaSolutions for Your Life

Download PDF
Publication #SL106

Monroe County, Keys Area: Soil Ratings for Selecting Pesticides1

G.W. Hurt and T.A. Obreza2

RATINGS FOR MONROE COUNTY, KEYS AREA SOILS FOR PESTICIDE SELECTION

Resource soil scientists with the U. S. Natural Resources Conservation Service have rated the soils that are delineated by map units in the Monroe County, Keys Area Soil Survey Report1 for their potential for leaching and runoff of pesticides. The rating criteria are given in a companion publication entitled "Soil Ratings for Selecting Pesticides for Water Quality Goals." These soil ratings have been developed to help pesticide users determine the potential for pesticides to be lost to groundwater or surface water bodies.

As explained in Circular 9592, factors that determine pesticide leaching ratings in soil are permeability and the occurrence of mucky layers in the upper 80 inches of the soil. Soils rated High have a high potential for pesticides to leach to groundwater, soils rated Medium have a medium potential for pesticides to leach to groundwater, and soils rated Low have a low potential for pesticides to leach to groundwater. Factors that determine pesticide runoff ratings from soils are hydrologic group, permeability, and slope. Soils rated High have a high potential for pesticide runoff, soils rated Medium have a medium potential for pesticide runoff, and soils rated Low have a low potential for pesticide runoff.

NOTE: The user may discover that one or more map unit names in Table 1 have been updated from names given in the legend of the soil survey report1. For example, a soil map unit may be listed in the survey report with a single soil series name, whereas the same soil map unit is shown as comprising two or more soil series in Table 1 (sequence numbers 1, 2, 3, ..) Where this occurs, the user should use the multi-named map unit given here, and make pesticide selections based on the most limiting condition to be found on the land in question. If necessary, the local Natural Resources Conservation Service office should be contacted to perform an on-site evaluation of the land in question.

REFERENCES

  1. Hurt, G.W., and C.V. Noble. 1995. Soil Survey of Monroe County, Keys Area, Florida. USDA/NRCS in cooperation with the University of Florida, Institute of Food and Agricultural Sciences, Agricultural Experiment Stations, Soil and Water Science Department; and Florida Department of Agriculture and Consumer Services.

  2. Obreza, T.A. and G. W. Hurt. 2006. Soil Ratings For Selecting Pesticides For Water Quality Goals. Circular 959, Soil and Water Science Department, Cooperative Extension Service, University of Florida, Gainesville, Florida, 32611. 5pp.

ACKNOWLEDGMENTS

The development of this document was supported by the USDA/ES Water Quality Initiative Project # 89EWQI-1-9134.

Tables

Table 1. 

Soil Ratings for Monroe County, Keys Area (see footnotes for explanations of column headings).

MUID

SYS NUM

MUSYM

SOIL NAME

SOIL LEACH

SOIL RUNOFF

87002 1 2 PENNEKAMP Medium High
87003 1 3 MATECUMBE Medium High
87004 1 4 ROCK OUTCROP High High
87004 2 4 TAVERNIER High High
87005 1 5 ISLAMORADA High High
87006 1 6 KEYLARGO High High
87007 1 7 UDORTHENTS High High
87007 2 7 URBAN LAND Low High
87008 1 8 ROCK OUTCROP High High
87008 2 8 CUDJOE Medium High
87009 1 9 LIGNUMVITAE Medium High
87011 1 11 URBAN LAND Low High
87012 1 12 ROCK OUTCROP High High
87012 2 12 CUDJOE Medium High
87013 1 13 KEYVACA Medium High
87015 1 15 CUDJOE Medium High
87016 1 16 BAHIAHONDA High Medium
87017 1 17 KEYWEST Medium High
87018 1 18 BEACHES High High
87019 1 19 SADDLEBUNCH Medium High
Footnotes:
MUID = Natural Resources Conservation Service's map unit identifier.
SEQ NUM = Sequence Number, indicating a particular soil name among one or more names constituting a map unit name.
MUSYM = Map Unit Symbol from the soil map and legend in the Soil Survey of Alachua County, Florida. Note that if a MUSYM appears more than once in this list it signifies that two or more soils make up that map unit, and each such soil is rated separately here.
SOIL NAME = Name of soil or other landscape component (urban land, water).
SOIL LEACH = The rating of the soil for leaching of pesticides through the soil profile.
SOIL RUNOFF = The rating of the soil for runoff of pesticides from the soil surface profile.
NOTE: See "Soil Ratings for Selecting Pesticides for Water Quality Goals" (IFAS Extension Circular No. 959) for explanations of the criteria used to develop soil ratings presented in the right-hand four columns of this list.

Footnotes

1.

This document is SL106, a fact sheet of the Soil and Water Science Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: April 1991, revised September 2006. Reviewed June 2013. Please visit the EDIS website at http://edis.ifas.ufl.edu.

2.

G.W. Hurt, National Leader for Hydric Soils, Natural Resources Conservation Service, USDA; T.A. Obreza, Professor, Soil and Water Science Department, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.