Research has shown that seasonal timing (fall vs. spring) has little effect on P availability due to its limited mobility in soils.
Take a look at the comparison of two nitrogen management studies.
Iowa farmer achieves many benefits when cover crops feed and house soil livestock.
Tests show heavy tillage is your enemy by damaging water infiltration and soil health.
Press release: More Efficient Nitrogen Fertilizer Improves Productivity with Reduced Handling Time, Improved Application Flexibility
Press release: The Willlmar Sideshooter will offer new features on the 2018 models.