Posted by paul on September 04, 2016 at 21:10:40 from (66.60.223.229):
In Reply to: Fertilizer posted by Mark Poss on September 04, 2016 at 17:49:38:
This pic is what 100 bu of field corn needs total to grow a crop, and how much gets hauled away by the corn forever.
You need the total amount available for the grain and plant to grow, and you need to replace the amount hauled away. so, if you have poor soils you should pay attention to build your soils up to have the total needed for your corn crop. If you have good fertile soils you onlyneed to replace what gets hauled away by the corn.
If you are getting 250bu yields, just multiply it out. ;)
I'm not totally clear on your question, if you wish to put the fert down with the planter, or spread it out by other means.
Typically you can't put that mich fert down with the planter, it is best to put a little down with the planter maybe 2-3 inches beside the row, and do the bulk of the N in a broadcast application. Or you can broadcast all of it.
More important than fertilizer is soil ph, if your soil is below 6ph, especially if it is near 5ph, lime is far more important than fertilizer. Acid soils tie up the fertilizer and don't let the corn roots pry it loose, so all the fertilizer goes to waste in a low ph soil. If you have high ph like me it's hard to fix, need to manage it some is all you can do.
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