Originally posted by blackpowder
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Experience locally indicates there has to be at least 40# of residual N to achieve the 13.5% protein premiums.
There will be much debate about maintaining yields if you extract all possible nutrients out of the soil down to rooting depth and consider all nutrients in the "Right Place" if in the seed row only.
IMHO much of the relatively recent yield increases come from not extracting everything available and leaving some nutrients for the whole root mass to access in the next crop.
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