Badger Beat. . . continued from pg. 43
Goldrush Response to Nitrogen Rate and Timing By Matt Ruark, UW-Madison, Dept. of Soil Science Research was conducted at the Hancock Agricultural Research Station evaluating Goldrush potato yields across nitrogen fertilizer rates from 30 to 345 pounds (lb.)-nitrogen/acre (N/ ac.). First, yields were about 15 percent lower than yields in 2016. But, similar to research in previous years, the optimum N rate was 210 lb.-N/ac.
44 BC�T January
with N rates above this rate (255, 300 and 345 lb.-N/ac.), resulting in slightly lower yields (Figure 1).
Figure 1: Total potato yield at the Hancock Agricultural Research Station across seven nitrogen rates in the 2017 growing season.
In this study, 30 lb.-N/ac. of N was applied at planting, with the remaining nitrogen being split across three
applications (emergence, tuber initiation and two weeks after tuber initiation—May 15, June 5 and