Drought-Tolerant Plants for North and Central Florida

Drought-Tolerant Plants for
North and Central Florida
Gary Knox

2 Drought-Tolerant Plants for Nor th and Central Florida
Drought-
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Drought-Tolerant Plants for North and Central Florida
Prepared by: Gary Knox, Professor, North Florida Research and Education Center, University of Florida,
Quincy, Florida

Copyright 2005 by University of Florida Cooperative Extension Service

Published September 2005

Instructional materials for Water, Water, Everywhere?, including teacher’s guide,
participant workbooks, fact sheets, PowerPoint presentations, a video viewer
guide, and public service announcements are available for download from the IFAS
Disaster Handbook Web site <http://disaster.ifas.ufl.edu>.

Development of Water Water Everywhere was supported by USDA Special Needs Grant
2001-41210-01188.

Cover images — Upper left: Native Plant Society of Texas
Lower left: Sarasota County Cooperative Extension
Right: Shirley Denton

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“Drought” “Drought
What is “Drought” and “Drought Stress?”
In nature, water is usually the most limiting factor for plant growth. This is also the case in
home or commercial landscapes. If plants do not receive adequate rainfall or irrigation, the
resulting drought stress can reduce growth more than all other environmental stresses
combined.

Drought can be defined as the absence of rainfall or irrigation for a period of time sufficient
Drought
to deplete soil moisture and injure plants.

Drought stress results when water loss from the plant exceeds the ability of the plant’s roots
Drought
to absorb water and when the plant’s water content is reduced enough to interfere with
normal plant processes.

In Florida, plants may frequently encounter drought stress. Rainfall is very seasonal, and
periodic drought occurs regularly. Because Florida’s soils are typically sandy and have low
water-holding capacity, many plants may experience drought stress after only a few days
without water. During drought, local governments may place restrictions on landscape irriga-
tion in order to conserve potable water, and landscape plants may become subject to
drought stress. Using drought-tolerant plants in the landscape can reduce the likelihood of
plant injury due to drought stress.

How Does Drought Stress Affect Plants?
How Drought Aff
A plant responds to a lack of water by halting growth and reducing photosynthesis and other
plant processes in order to reduce water use. As water loss progresses, leaves of some
species may appear to change color — usually to blue-green. Foliage begins to wilt, and if the
plant is not irrigated, leaves will fall off and the plant will eventually die.

Drought symptoms resemble salt stress because high concentrations of salts in the root
zone cause water loss from roots. Close examination of environmental and cultural condi-
tions should help identify the specific problem.

How Long Before Drought Stress Develops?
How Before Drought Dev
The time required for drought injury to occur depends on the water-holding capacity of the
soil, environmental conditions, stage of plant growth, and plant species. Plants growing in
sandy soils with low water-holding capacity are more susceptible to drought stress than
plants growing in clay soils. A limited root system will accelerate the rate at which drought

Drought-
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stress develops. A root system may be limited by the presence of competing root systems, by
site conditions such as compacted soils or high water tables, or by container size (if growing
in a container). A plant with a large mass of leaves in relation to the root system is prone to
drought stress because the leaves may lose water faster than the roots can supply it. Newly
installed plants and poorly established plants may be especially susceptible to drought
stress because of the limited root system or the large mass of stems and leaves in compari-
son to roots.

How Does Environment Affect Drought Stress?
How Envir
vironment Aff Drought
Aside from the moisture content of the soil, environmental conditions of high light intensity,
high temperature, low relative humidity and high wind speed will significantly increase plant
water loss.

The prior environment of a plant also can influence the development of drought stress. A
plant that has been drought stressed previously and has recovered may become more
drought-resistant. Also, a plant that was well-watered prior to drought will usually survive
drought better than a continuously drought-stressed plant.

to Reduce Eff Drought
What Changes Can Be Made to Reduce Effects of Drought in the
Landscape?
The landscape environment can be modified to reduce or prevent drought stress by irriga-
tion, mulching, providing shade, and creating windbreaks. Reducing the overall water re-
quirements of the landscape is best achieved by initially designing the landscapes for water
conservation, including efficient irrigation systems, proper watering, and the use of drought-
tolerant plants where appropriate. For more information, check these resources:

• Florida Yards and Neighborhoods Web site: <http://hort.ufl.edu/fyn/>
• Landscape Design for Water Conservation, Florida Extension Fact Sheet ENH-72
• Coping with Drought in the Landscape, Florida Extension Fact Sheet ENH-70
• Managing Your Florida Lawn Under Drought Conditions, Florida Extension Fact
Sheet ENH-157
• Improving Drought Tolerance in Your Florida Lawn, Florida Extension Fact Sheet
ENH-57
• Watering Your Florida Lawn, Florida Extension Fact Sheet ENH-9

Drought-
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Note: Fact sheets are available through the Florida Extension Service Publications Web site:
<http://edis.ifas.ufl.edu>.

Characteristics Drought-
ought-T
What are the Characteristics of Drought-Tolerant Plants?
Some species have an inherent tolerance of drought because they have evolved in arid
areas, regions with frequent drought, or regions with soils of low water-holding capacity.
Some species have anatomical or physiological characteristics that allow them to withstand
drought or to acclimate to drought.

All plants have a waxy coating on their leaves called “cuticle,” but some species have devel-
oped exceptionally thick cuticles that reduce the amount of water lost by evaporation from
the leaf surface. Leaf hairs, which reduce air movement at the leaf surface, are another
means of reducing evaporation from the leaf. Since the amount of surface area exposed to
the atmosphere affects evaporation, leaf size and thickness are other adaptations, with
thicker leaves and smaller leaves being more resistant to water loss.

Some species have evolved large surface root systems to quickly absorb rainfall, while other
species grow deep root systems to tap deep water tables. Some plants avoid drought by
dropping their leaves during droughts, and quickly regrowing new leaves when environmental
conditions improve.

Drought-
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Drought-
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Lists of Drought-Tolerant Plants
The plants listed in the following tables have been reported to tolerate drought stress better
than most landscape plants. Although these plants are considered drought-tolerant, new
plantings will require regular irrigation for 6 weeks to 6 months or more before they become
established well enough to be effectively drought-tolerant. Trees larger than two inches
caliper (two inches in diameter) will take longer to establish.

Plants are listed in one of five categories:

• Trees
• Palms
• Shrubs
• Groundcovers
• Vines

Within each list, plants are listed in alphabetical order according to scientific name. Common
names are also given. Plants native to Florida are indicated, and the region of adaptation
within north and central Florida is given for each plant. North Florida (N) extends from
Pensacola to Jacksonville and south to Ocala; central Florida (C) consists of the area from
Ocala south to Punta Gorda and Fort Pierce.

Nor th
North

Central

South

Drought-
ought-T for North 7

Trees
Common Name Scientific Name
Scientific Native?
Native? Region of
Adaptation
Box elder Acer negundo Yes N
Bauhinia, Orchid tree Bauhinia blakeana, ----- C
B. purpurea, B. monandra

Bottlebrush Calistemon spp. ----- C
Pignut hickory Carya glabra Yes N, C
Catalpa Catalpa spp. Some N
Cedar Cedrus spp. ----- N, C

Hackberry, Sugarberry Celtis spp. Some N, C

Redbud Cercis canadensis Yes N, C
Citrus Citrus spp. ----- N, C
Smoke tree Cotinus spp. Some N

Hawthorn Crataegus spp. Some N, C
Cypress Cupressus spp. ----- N
Loquat Eriobotryia japonica ----- N, C
Coral tree, Cockspur coral tree Erythrina crista-galli Yes C
Eucalyptus, Gum tree Eucalyptus spp. Some C
Evodia Evodia spp. ----- N, C

Fig Ficus carica ----- N, C
Honeylocust Gleditsia triacanthos Yes N
Silk oak Grevillea robusta ----- C
American holly Ilex opaca Yes N, C
Yaupon, Yaupon holly Ilex vomitoria Yes N, C
Jacaranda Jacaranda mimosifolia ----- C

Southern red cedar Juniperus silicicola Yes N, C

Drought-
ought-T for North

Trees
Scientific Native?
Native? Region of
Adaptation
Juniper Juniperus spp. Some N, C
Crape myrtle Lagerstroemia indica, ----- N, C
L. fauriei, L. (indica x fauriei)

Laurel Laurus nobilis ----- C

Macadamia nut Macadamia integrifolia ----- C
Osage orange Maclura pomifera ----- N
Southern magnolia Magnolia grandiflora Yes N, C

Mulberry Morus spp. Some N,C

Wax myrtle Myrica cerifera Yes N,C
Jerusalem thorn Parkinsonia aculeata ----- N, C
Bay Persea spp. Some N, C

Sand pine Pinus clausa Yes N, C

Slash pine Pinus elliottii Yes N, C
Japanese black pine Pinus thunbergiana ----- N
Pistachio Pistacia spp. ----- N, C
Oriental arborvitae Platycladus orientalis ----- N, C
Podocarpus, Yew podocarpus Podocarpus macrophyllus ----- N, C

Nagi podocarpus Podocarpus nagi ----- C

White poplar Populus alba ----- N
Chickasaw plum Prunus angustifolia Yes N, C
Cherry laurel Prunus caroliniana Yes N, C
Cherry plum Prunus cerasifera ----- N
Hoptree Ptelea trifoliata Yes N, C

Chapman oak Quercus chapmanii Yes C

Drought-
ought-T for North 9

Trees
Scientific Native?
Native? Region of
Adaptation
Holly oak Quercus ilex ----- N, C
Bluejack oak Quercus incana Yes N, C
Turkey oak Quercus laevis Yes N, C
Laurel oak Quercus laurifolia Yes N, C
Bur oak Quercus macrocarpa Yes N, C
Myrtle oak Quercus myrtifolia Yes C
Water oak Quercus nigra Yes N, C
Pin oak Quercus palustris ----- N,C
Chestnut oak Quercus prinus Yes N,C
Shumard oak Quercus shumardii Yes N, C
Post oak Quercus stellata Yes N, C
Cork oak Quercus suber ----- N, C
Black oak Quercus velutina Yes N, C
Live oak Quercus virginiana Yes N
Sumac Rhus spp. Some N, C
Locust Robinia spp. Some N
Soapberry Sapindus spp. Some N, C
Japanese pagoda tree, Sophora spp. Some N, C
Necklace pod

Tamarisk Tamarix spp. ----- N, C
Pond cypress Taxodium ascendens Yes N, C
Baldcypress Taxodium distichum Yes N, C
Elm Ulmus spp. Some N, C
Zelkova Zelkova serrata ----- N, C
Jujube Ziziphus spp. ----- N, C

Drought-
ought-T for North

Palms
Scientific Native?
Native? Region of
Adaptation
Paurotis palm Acoelorrhaphe wrightii Yes C
Queen palm Arecastrum romanzoffianum ----- C

Pindo palm Butia capitata ----- N, C
European fan palm Chamaerops humilis ----- N, C
Sago palm Cycas revoluta ----- N, C
Canary Island date palm Phoenix canariensis ----- N, C

Pygmy date palm Phoenix roebelenii ----- C
Needle palm Rhapidophyllum hystrix Yes N, C
Lady palm Rhapis excelsa ----- N, C
Dwarf palmetto Sabal minor Yes N, C

Cabbage palm Sabal palmetto Yes N, C
Saw palmetto Serenoa repens Yes N, C
Windmill palm Trachycarpus fortunei ----- N
California fan palm, Washingtonia filifera ----- N, C
Desert fan palm

Mexican fan palm, Washingtonia robusta ----- N, C
Washington palm

Drought-
ought-T for North 11

Shrubs
Scientific Native?
Native? Region of
Adaptation
Glossy abelia Abelia x grandiflora ----- N
Sweet acacia Acacia farnesiana ----- N, C
Century plant Agave americana ----- N, C
Aloe Aloe ----- C
Lead plant Amorpha canescens Yes N, C
Chokeberry Aronia spp. Some N, C
Sage, Sagebrush Artemisia spp. ----- N, C
Eastern baccharis, Baccharis halimifolia Yes N,C
Groundsel bush, Salt bush

Mentor barberry Berberis x mentorensis ----- N
Japanese barberry Berberis thunbergii ----- N
Silver sea oxeye Borrichia arborescens Yes C
Butterfly bush Buddleia spp. ----- N
Cactus Cactaceae family Some N, C
Beauty berry Calicarpa americana Yes N, C
Bottlebrush Callistemon spp. ----- N, C
Dwarf natal palm Carissa grandiflora ‘Prostata’ ----- C
Senna, Cassia Cassia alata (Senna alata) ----- N, C
Rosemary Ceratiola ericoides Yes N, C
Hedge cactus Cereus peruvianus ----- N, C
Quince Chaenomeles spp. ----- N
Sweet fern Comptonia peregrina Yes N
Pampas grass Cortaderia selloana ----- N, C
Cotoneaster Cotoneaster spp. ----- N

Southern bush honeysuckle Diervilla sessifolia Yes N, C
Coral bean, Cherokee bean Erythrina herbacea Yes N, C

Drought-
ought-T for North

Shrubs
Scientific Native?
Native? Region of
Adaptation
Pascuita, Crown of thorns, Euphorbia spp. ----- C
Pencil tree

Pineapple guava Feijoa sellowiana ----- N, C
Fig Ficus carica ----- N, C
Kumquat Fortunella japonica ----- C
African daisy Gamolepis chrysanthemoides ----- C
Broom, Woadwaxen Genista spp. ----- N,C
Sea buckthorn Hippophae rhamnoides ----- N,C
St. John’s-wort Hypericum spp. Some N, C
Gallberry Ilex glabra Yes N, C
Yaupon, Yaupon holly Ilex vomitoria Yes N, C
Lantana Lantana spp. ----- N, C
English lavender Lavandula angustifolia ----- N
Bush clover Lespedeza spp. Some N, C
Texas sage Leucophyllum frutescens ----- N, C
Matrimony vine, Lycium spp. Some N, C
Christmas berry

Rusty lyonia Lyonia ferruginia Yes N, C
Wax myrtle Myrica cerifera Yes N, C
Myrsine Myrsine guianensis Yes C
Myrtle Myrtus communis ----- N, C
Oleander Nerium oleander ----- N, C
Indian fig, Prickly pear Opuntia ficus-indica Yes N, C
Devils-backbone Pedilanthus tithymaloides Yes C
Photinia, Redtop ----- N, C

Drought-

Shurbs
Scientific Native?
Native? Region of
Adaptation
Pittosporum Pittosporum spp. ----- N, C
Oriental arborvitae Platycladus orientalis ----- N, C
Cape leadwort, Plumbago Plumbago auriculata ----- C
Podocarpus, Yew podocarpus Podocarpus macrophyllus ----- N, C
Nagi podocarpus Podocarpus nagi ----- N, C
Cherry laurel Prunus caroliniana Yes N,C
Pomegranate Punica granatum ----- N,C
Firethorn Pyracantha spp. ----- N, C
Indian hawthorn Raphilepis spp. ----- N, C
Buckthorn, Indian cherry Rhamnus spp. Some N, C
Sumac Rhus spp. Some N
Rose Rosa spp. ----- N, C
Rosemary Rosemarinus officinalis ----- N, C
Butchersbroom Ruscus aculeatus ----- N, C
Inkberry Scaevola plumieri Yes C
Boxthorn Severina buxifolia ----- N, C
Buffalo-berry Shepherdia spp. ----- N, C
Japanese pagoda tree, Sophora spp. Some N, C
Necklace pod
Spiraea Spiraea spp. ----- N
Bay cedar Suriana maritima Yes C
Yellowbells, Yellow elder Tecoma stans Yes C
Blueberry, Sparkleberry Vaccinium spp. Some N, C
Viburnum Viburnum spp. Some N, C
Chaste tree Vitex agnus-castus ----- N, C
Yucca Yucca spp. Some N, C
Coontie Zamia floridana Yes N, C

Drought-
ought-T for North

Groundcovers
Groundco ers
oundcov
Scientific Native?
Native? Region of
Adaptation
Aloe Aloe spp. ----- C
Bromeliads Bromeliaceae family Some C
Beach bean Canavalia maritima Yes C

Hottentot fig Carpobrotus edulis ----- C
Bearberry cotoneaster Cotoneaster dammeri ----- N
Bermudagrass Cynodon dactylon ----- N, C
Golden creeper Ernodea littoralis Yes C

Purpleleaf wintercreeper Euonymus fortunei ‘Coloratus’ ----- N
Creeping fig Ficus pumila ----- N, C
Trailing fig Ficus sagittata ----- C
Sunrose Helianthemum nummularium ----- N, C

Beach sunflower Helianthus debilis Yes N, C
Daylily Hemerocallis spp. ----- N, C
St. John’s-wort Hypericum spp. Some N, C
Morning glory Ipomoea spp. Some N, C
Lantana Lantana spp. ----- N, C

Gopher apple Licania michauxii Yes C
Matchweed Lippia nodiflora Yes N, C
Liriope Liriope spp. ----- N, C
Bahiagrass Paspalum notatum ----- N, C
Cinquefoil Potentilla spp. ----- N, C
Rosemary Rosemarinus officinalis ----- N,C

Sea purslane Sesuvium portulacastrum Yes N, C

Drought-

Groundcovers
Groundco ers
oundcov
Scientific Native?
Native? Region of
Adaptation
Purple heart Setcreasea pallida ----- N, C
Cape honeysuckle Tecomaria capensis ----- C
Rice-paper plant Tetrapanax papyriferus ----- N, C

Asiatic jasmine Trachelospermum asiaticum ----- N, C
Puncture vine Tribulus terrestris ----- N, C
Society garlic Tulbaghia violacea ----- N, C
Sea oats Uniola paniculata Yes N, C

Zoysiagrass Zysoia spp. ----- N, C

Drought-
ought-T for North

Vines
Scientific Native?
Native? Region of
Adaptation
Crossvine Anisostichus capreolata Yes N, C
Bouganvillea Bouganvillea spp. ----- C
Trumpet creeper Campsis spp. Some N, C

Marine ivy Cissus incisa Yes N, C
Drummond clematis Clematis drummondii ----- N, C
Texas clematis Cematis texensis ----- N, C
Purpleleaf wintercreeper Euonymus fortunei ‘Coloratus’ ----- N

Creeping fig Ficus pumila ----- N, C
Carolina yellow jasmine Gelsemium sempervirens Yes N, C
Mornign glory Ipomoea spp. Some N, C
Honeysuckle Lonicera sempervirens Yes N, C

‘Dropmore Scarlet’ honeysuckle Lonicera (hirsuta x sempervirens ----- N, C
‘Dropmore Scarlet’
‘Golden Flame’ honeysuckle Lonicera x heckrotti ‘Gold Flame’ ----- N, C
Matrimony vine, Lycium spp. Some N, C
Christmas berry
Virginia creeper Parthenocissus quinquefolia Yes N, C

Flame vine Pyrostegia venusta ----- C
Cape honeysuckle Tecomaria capensis ----- C
Confederate jasmine Trachelospermum jasminoides ----- N, C
Grape Vitis spp. Some N, C
Japanese wisteria Wisteria floribunda ----- N
Native wisteria Wisteria frutescens Yes N,C

Drought-

Afterword
Why should we care about drought?
Why we drought?
We expect that every time we turn a faucet’s handle that plenty of fresh, drinkable water will
flow out. Whenever we turn on the hose to clean the car, water the plants or wash the dog,
we know that water will flow. Most people take for granted the ready availability of water for
showers, toilets, and pools, but this is not always the case. Author John Steinbeck wrote in
his novel East of Eden, “And it never failed that during the dry years the people forgot about
the rich years, and during the wet years they lost all memory of the dry years. It was always
that way.”

Water management in the United States is very efficient, and most water users never really
feel the impact of water shortages. Nevertheless, recent years have seen significant
droughts in the United States. As populations continue to grow in the U.S. and throughout
the world, demand for water is constantly increasing. During the past 50 years, groundwater
depletion has spread from isolated pockets to large areas in many countries. One example is
in the High Plains of the central U.S., where more than half of the groundwater storage has
been depleted in some areas. In South Florida, water management officials have predicted
they will run out of groundwater by 2020.

Added to the population increases and the increased demands for groundwater are the
effects of drought. In recent years, many areas of the U.S. have suffered severe droughts —
periods of years during which rainfall is much less than normal. During such periods, more
water must be drawn from the ground to irrigate yards and farms, however, because rainfall
is reduced, groundwater is not replenished. This vicious cycle makes the effects of drought
more severe.

Drought comes with a high cost. For some, it may mean only minor inconveniences, such as
modest water restrictions, but any enterprise that requires water can be severely impacted.
Anyone who tends plants, whether on a small scale or large scale, soon feels the impact of
drought. Businesses that depend on water must use more water to compensate for dry
conditions and also pay more for the water they use. Hay production decreases during
drought, and hay must be imported into the drought area to keep livestock alive. Drought is
an insidious kind of disaster. You don’t know you’re in a drought until you are many months
into it, and as it continues, it slowly takes a greater and greater toll.

The key is that we must not lose “all memory of the dry years.” Even during times of normal
precipitation and groundwater levels, citizens should be aware of how to use water wisely.
Increased environmental awareness and improved irrigation practices like the ones outlined
in this program can make a difference. With proper preparedness, the effects of drought can
be minimized.

Drought-
ought-T for North

About the IFAS Disaster Information Program
IFAS Disaster Information Program
The IFAS Disaster Information Program is an on-going project with the goal of producing a comprehensive
information source for the general public, Extension agents, emergency preparedness and response profession-
als, and government. Water, Water, Everywhere? is the latest addition to this collection, which includes:

# The Disaster Handbook — The cornerstone of the IFAS Disaster Information Program is the Disaster
Disaster
Handbook, a two-volume set that contains over 350 publications. Volume One contains a wide variety of
information that can help people and communities prepare for, survive, and recover from disasters.
Special chapters are devoted to Home Recovery and Farm Recovery. Volume Two covers many specific
Tw
disasters, such as hurricanes, tornadoes, extreme heat and cold, lightning, wildland fires, hazardous
materials and more. Each chapter has appropriate information for the general public, homeowners,
businesses, agricultural producers... in short, for all sorts of groups.

The Disaster Handbook materials are designed so that they can be duplicated locally and distributed. This
allows local professionals and community leaders to quickly develop appropriate packets of information
customized to immediate local needs. All Disaster Handbook publications are also available for download
from the IFAS Disaster Information Web Site. Check the Web site also for updated and new materials.

# Triumph Over Tragedy Video Series — The IFAS Disaster Information Program has produced three videos
riumph Over Tragedy
that cover specific disaster topics. For each video, an extensive manual provides additional resources to
help in creating your own workshops. Surviving the Storm: Coordination, Communication, and Coopera-
Surviving Storm: Coordination,
tion is an introductory video which will be of interest to general audiences. This video shows the impor-
tance of citizens, government and private industry working together to confront disaster situations.
Helping Four-Legged Friends Sur vive the Storm covers many important issues concerning small and
Four
our-Legged Friends Survivvive Storm
large animals -- and their owners -- during a disaster. Much of the footage in this video is based on Florida
experiences. A Community Response to Managing Post-Disaster Stress talks about the emotional and
Response to Post-Disast
ost-Disaster
psychological challenges posed by disasters. This is an overlooked area and one that the general public
and service providers should understand more fully.

# Public Service Announcements — The Disaster Handbook contains over 70 scripts for public service
Service
announcements (PSA) that can be used by local radio stations. Over 40 of these scripts have been
recorded and are available for direct download by radio stations on the Internet from RadioSource.net.
adioSource.net
adioSource.ne
PSAs are avaiable in English and Spanish.The radio spots are available from RadioSource.net in MP3 and
WAV formats. Make broadcasters and emergency managers in your vicinity aware of this resource.

# Agrochemicals and Security: A Training Module for the Safe and Secure Storage of Pesticides and
grochemicals Training for Safe Storage Pesticides
Fer tilizers — The new security environment has prompted the farm community to re-examine how the
ertilizer
tilizers
chemicals that are part of its daily work are handled. Agricultural chemicals have been used in two of the
most significant terrorist incidents in the U.S., the World Trade Center Bombing of 1993 and the Okla-
homa City Bombing of 1995. Also, another fertilizer, anhydrous ammonia, has become the target of drug
manufacturers for the production of methamphetamine, now a significant law enforcement issue through-
out the U.S. Agrochemicals and Security includes six units that cover the following topics: Introduction:
grochemicals
Agrochemicals and Security — Why It Matters; Chemicals and Safety; Homeland Security and Fertilizers;
Homeland Security and Pesticides; Security and Anhydrous Ammonia; and, Developing a Hazard Mitiga-
tion Plan. Units can be used separately or in combinations depending on audience needs. Each unit
consists of a narrative which gives background material, a PowerPoint presentation which parallels the
narrative, pre- and post-tests, an evaluation, and table-top exercises for selected units.

Web: <http://disaster.ifas.ufl.edu>
er.if
On the Web: <http://disaster.ifas.ufl.edu>

Drought-

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