Too much P Too much K - Ask Extension
Just had a soil test done everything looked good except two things that I
don't remember happening in last years soil test the Phosphorous level cam...
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Too much P Too much K #889629
Asked November 10, 2024, 7:40 PM EST
Just had a soil test done everything looked good except two things that I
don't remember happening in last years soil test the Phosphorous level came out at 41.3 ppm normal levels. 8.0--20.0, potassium 109.84 normal levels 38.0-80.0 can I plant a. Nitrogen fixing legume to bring the P & K levels back to a reasonable number and what legume would you plant at this time of the year. The only other numbers that where off where nitrogen very low and sulfur a little bit low. To be expected
Multnomah County Oregon
Expert Response
A legume cover crop will not particularly reduce P or K, beyond what the crop takes up. It's rainfall that reduces these.
I'd say it's late to plant any cover crop - seed generally requires warmth to germinate.
Still if you're determined, among the legumes, right now I'd try crimson clover (an annual - freely self-seeding) or hairy vetch ( another free self seeder.)
Among the grasses, I'd plant rye or oats - the latter will cold kill, the former will hang on though out the winter. Grasses form dense root mats, which may be harder to work into the soil. Of course, I'm in the no-till crowd. If you are not, it should be not too much trouble.
Among the forbs, I'd try radish or beet - or arugula.
Whatever you sow at this time of year, sow PLENTY of seed, as the germination rates will be reduced.
I'd say it's late to plant any cover crop - seed generally requires warmth to germinate.
Still if you're determined, among the legumes, right now I'd try crimson clover (an annual - freely self-seeding) or hairy vetch ( another free self seeder.)
Among the grasses, I'd plant rye or oats - the latter will cold kill, the former will hang on though out the winter. Grasses form dense root mats, which may be harder to work into the soil. Of course, I'm in the no-till crowd. If you are not, it should be not too much trouble.
Among the forbs, I'd try radish or beet - or arugula.
Whatever you sow at this time of year, sow PLENTY of seed, as the germination rates will be reduced.
