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Soil Ammendment Chart

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

Add every 2-5 years:

Rate

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

 

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