It's ideal to have your soil tested by a lab once every 5 years or so and base your amendments on the results. If you want to skip analysis then this chart provides a good rough guide for amending your soil.
A Rough Guide for Amending Soils in the Klamath-Trinity Region |
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Add every 2-5 years: |
Rate |
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Nutrient |
Source |
LB/ 100 ft2 |
LB/ acre |
Calcium |
Mined limestone or oyster shell flour |
2-5 LB |
1,000 - 2,000 LB |
Phosphorous |
soft rock colloidal phosphate |
2-3 LB |
500 - 1,000 LB |
Add every year (choose one, or combine): |
|
|
|
Nitrogen, choose one: |
bloodmeal |
4 LB |
500-1,000 LB |
fishmeal |
6 LB |
750 - 1,000 LB |
|
cottonseed meal |
8 LB |
1,000 - 2000 LB |
|
alfalfa meal |
5 LB |
500 - 1,000 LB |
|
composted chicken manure |
25 LB |
10 yards/ acre |
|
Organic Matter |
compost, cover cropping, mulching |