Posted by IaGary on January 27, 2012 at 15:08:44 from (108.160.229.48):
Every crop you raise removes nutriants from the soil.
With that said if I remove 5 tons of hay, 200 bu of corn or 60 bushel beans there are charts on how much P and K those yeilds would remove.
So to get the soil back to where it was you need to add enough fertilizer to replace what the crop removed. Most poeple barely put on enough fert. to replace what they removed. So why sample? You may want to sample the first time to figure out how out of balance the soil is. But after that unless your trying to build the soil it is no use sampling.
I have tryed that build system and you think your building but the next sample you actually went backwards.
I mainly sample to check PH and balance. I may then add extra P or K to get in balance a little better but that's it. I usually just put on a maintance amount to replace the removal.
The reason I feel the way I do is you pull 5 10 or whatever the number may be 3/4 diameter cores from 10 to 20 acres and you may have missed the spot pellet fell on last year or you may have hit it dead center.
I test most fields about every 4 to 6 years. Testing every year is a waste in my eyes.
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