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Montana | David
I'm agreeing and disagreeing. If yields and proteins vary greatly like I see on my farm then both need to be measured. Areas that have a yield potential of 25 don't require as much N to raise protein from 12 to 14 as areas that have a potential of 75. Those differences in yield potentials arises from the SOIL. Different soils have different abilities to store or hold moisture AND Nitrogen. I believe that doing a great job of nitrogen application you need to know the soil potential first. Past years yield and protein data give strong clues to this. I think measuring SOIL properties is better. Protein and yield data gives the strong clues as to the REMOVAL of nitrogen and protein data gives the strongest clues to estimated REMAINING nitrogen in the soil.
I have to keep reminding myself that people in some wetter areas think ( they could be right ) that soil nitrogen can't be stored for them. | |
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Teach me about GPS yield mapping
