| |
 | 
 ecmn
 | University of Minnesota, spring applied has less opportunity of tie up 
 Michigan State State had a study that fall applied could be as effective as spring applied. If tillage was done right, but have to take in considerations of erosion and runoff, use cover crops to reduce tie up
 
 Purdue University has a paper on rates, timing, and application method. Too much up front is not a good thing.
 
 South Dakota State has a similar paper discussing the 4 R's of nutrient management And its effect on nutrient uptake and environmental losses.
 
 
 
 |  |
 |