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CLEAR GRAND Nonpoint Source Pollution Reduction for Grand Lake Watershed, Oklahoma "Land Grows Green, Water Stays Clean" |
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Nutrients and Fertilizers
Most nutrients
needed by plants are abundant in soil.
These 3
nutrients
may be depleted
by removing grass clippings from a lawn or harvesting a garden.
Occasional
fertilization may be needed to keep plants healthy.
Excess
Fertilizer Causes Water Pollution
When it rains, nutrients from the landscape wash to nearby lakes and streams. These nutrients cause rapid growth of aquatic weeds and algae and oxygen becomes depleted in the water. Extreme cases can lead to fish kills and poor tasting water.
Tips for Fertilizer Application
Soil Tests – no
need to guess
A soil test
helps you know exactly how much fertilizer you need.
You save money and protect the environment by applying no more
than needed. Get your soil tested at your
local county OSU Extension office.
 What
does 19-19-19 mean on fertilizer bags?
The 3 numbers show the percentage of nutrients N, P and K, in that order.
What Fertilizer
Should I Apply?
NOTE:
Many lawns and gardens around Grand Lake are low only in
nitrogen. Try a high nitrogen
fertilizer first (if you don’t test your soil).
More Tips for Your Yard 
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