Skip to main content
OSU Extension Service
Search
Main navigation
Topics
Animals and livestock
Beef cattle
Bees and pollinators
Commercial fishing, crabbing and clamming
Dairy
Horses
Poultry and rabbits
Sheep and goats
Swine
Business and economics
Business management
Business marketing
Estate and succession planning
Finance, budgeting and taxes
Rural economic development
Community vitality
Agritourism
Community science
Community disaster preparedness
Community planning
Health outreach
Local, regional and community food systems
Crop production
Berries, table grapes and kiwifruit
Field crops
Fruit trees
Hazelnuts and nut crops
Hemp
Nursery and greenhouse
Organic agriculture
Pastures and forages
Soil
Vegetables and specialty seeds
Wine grapes
Food
Commercial food processing
Farm food safety
Food security
Home food preservation
Home food safety and storage
Nutrition and healthy eating
Recipes
Wine, beer, cider and spirits
Forests, woodlands and rangelands
Christmas trees
Cutting and selling trees
Fire
Forest health and management
Non-timber forest products
Rangeland conservation and management
Tree care
Wood processing and products
Gardening, lawn and landscape
Monthly garden calendars
Bees and pollinators
Berries and fruit
Flowers, shrubs and trees
Garden soil and compost
Gardening techniques
Garden vegetables and herbs
Lawn and turfgrass
Urban forestry
Wildlife
Outdoors and environments
Climate change
Environmental education (PreK-12)
Fish and aquatic life
Sustainability
Wildlife
Pests, weeds and diseases
Healthy homes
Insects
Integrated pest management
Invasive species
Nuisance wildlife
Pesticide safety and education
Plant diseases
Weeds
Water and watersheds
Fish and aquatic life
Irrigation
Ponds
Residential water and wells
Riparian areas
Water management and conservation
Youth, families and health
Family emergency preparedness
Food security
Healthy aging
Healthy homes
Nutrition and healthy eating
Parenting
Physical activity
Youth education resources
Get involved
Programs
Projects
Events
About
About us
Our leadership
Program areas
Diversity, Equity and Inclusion
Our history
Our impact
Get involved
Donate
Latest content
News
Career opportunities
Advisory and advocacy groups
Contact us
Find a location near you
Faculty and staff
Ask Extension
Search OSU Extension
Refine results
Filter by topic
Business management
(5)
Pasture and forages
(3)
Climate change
(2)
Vegetables and specialty seeds
(2)
Wine, beer, cider and spirits
(2)
Wine grapes
(2)
Berries, table grapes and kiwifruit
(1)
Field crops
(1)
Rural economic development
(1)
Soil
(1)
Sustainability
(1)
Water management and conservation
(1)
(-)
Weeds
(1)
Filter by region
Statewide
(1)
Filter by type
Educational gallery
(1)
Filter by keyword
weeds
(39)
weed management
(25)
Integrated Pest Management (IPM)
(16)
Weeds and Invasive Species
(10)
pastures
(6)
poisonous plants
(6)
herbicides
(5)
pesticides
(5)
weed removal
(5)
forage
(3)
moss
(3)
pasture management
(3)
pasture weeds
(3)
vinegar
(3)
berries and grapes
(2)
compost
(2)
dandelion
(2)
field crops
(2)
glyphosate
(2)
grass
(2)
grazing
(2)
himalayan blackberry
(2)
invasive plants
(2)
lawns
(2)
livestock
(2)
moss control
(2)
organic agriculture
(2)
poison hemlock
(2)
poison oak
(2)
puncture vine
(2)
tansy ragwort
(2)
vegetables
(2)
weed control
(2)
weed identification
(2)
wine grapes
(2)
beekeeping
(1)
bees
(1)
biodiversity
(1)
butterflies
(1)
canada thistle
(1)
cattle health
(1)
cattle management
(1)
cheat
(1)
christmas trees
(1)
cocklebur
(1)
comfrey
(1)
(-)
common mallow
(1)
cowcockle
(1)
cows
(1)
degree-days
(1)
dock
(1)
does
(1)
ecosystem
(1)
endophytes
(1)
environmental health
(1)
ewes
(1)
false lupine
(1)
fiddleneck
(1)
field bindweed
(1)
first aid
(1)
flixweed
(1)
forestry
(1)
foxtail
(1)
foxtail barley
(1)
gardening techniques
(1)
grass seed
(1)
grazing management
(1)
groundsel
(1)
hayground
(1)
hazelnuts
(1)
honey bees
(1)
horsetail
(1)
houndstongue
(1)
hummingbird
(1)
invasive species
(1)
knotweeds
(1)
lambsquarter
(1)
leafcutter bees
(1)
longspine sandspur
(1)
management
(1)
mason bees
(1)
medusahead
(1)
mowing
(1)
native bees
(1)
noxious weeds
(1)
onions
(1)
organic
(1)
organic gardening
(1)
pastures and forages
(1)
pest management
(1)
pollination
(1)
pollinator habitat
(1)
ragworts
(1)
rangeland
(1)
redroot pigweed
(1)
reforestation
(1)
ripgut brome
(1)
roundup
(1)
scouring rush
(1)
sheep management
(1)
silage
(1)
small farm crops
(1)
small farms
(1)
snap beans
(1)
soil and water
(1)
St. Johnswort
(1)
stinging nettles
(1)
table grapes
(1)
tansy mustard
(1)
techniques
(1)
Techniques for Managing Trees and Forests
(1)
threat-based
(1)
turfgrass
(1)
Umatilla County
(1)
Urban Trees and Forests
(1)
weather
(1)
western braken fern
(1)
western water hemlock
(1)
wheat
(1)
yellow star thistle
(1)
Have a question?
Ask Extension
English
Español
Search
Showing 1 - 1 of 1 results.
Plants Causing Nitrate & Oxalate Poisoning in Pastures
Some plants absorb excess nitrates or oxalates from the soil and store them in plant tissues. Toxicity problems can occur in animals which feed on these plants.
Mylen Bohle, David Hannaway, Andy Hulting, Karin Neff | Apr 2018 |
Educational gallery