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WWW.POTATOGROWER.COM 19 KuhnNor thAmerica.com INVEST IN QUALIT Y ® YOUR BEST COMPACTION SOLUTION • Ultra-large 25" diameter coulters on 9" spacing offer improved residue cutting versus discs • Two ranks of shanks on 18" spacing provide maximum soil fracture and non-stop operation in heavy residue • Disc Conditioner System provides clod sizing and leveling • Heavy-duty 24/7 ® Conditioning Reel for aggressive clod sizing and soil firming • 10'6" to 19'6" working width DOMINATOR ® 4855 PRIMARY TILLAGE SYSTEM • Coulter gangs feature PEER ® TILLXTREME TM bearings with an exclusive nylon ring for self-alignment and protective cast housing with pass- through bolts simplifying bearing replacement • New spherical pivot bearings on each walking beam require no daily grease maintenance • Angular contact bearing cartridge with heavy-duty, multi-lip (5) bearing seal and machine-forged spindle with 5-bolt pattern allows fast, easy blade replacement. • The heavy-duty 24/7 ® conditioning reel incorporates maintenance-free PEER ® TILLXTREME TM bearings MAINTENANCE-FREE FEATURES 170221KuhKra23v.indd 1 11/29/17 1:56 PM Contact Jim Mortenson 715-335-4912 Mortensonbros.com Seeking Farm Manager Over 13,000 Acres Farmed • Looking for Qualied Candidate with Credentials • Extensive Knowledge of Potato Producing and Storage • Compensation Commensurate with Experience 171091MikMei16v.indd 1 12/12/17 8:58 AM soil in Minnesota found increases in potato yields with boron and zinc applications, but not with manganese or copper applications. In acid soils, iron, manganese and copper should be available in adequate amounts to meet crop needs. Pesticide sprays often contain enough copper and zinc to meet plant demands for these nutrients. In extremely acid soils (pH lower than 4.8), manganese toxicity may be a problem. Very few potato responses to molybdenum and chlorine have not been reliably studied and reported. Little research has been done on nickel, but required amounts are very low and soil deficiency is probably very uncommon. This article is excerpted from Carl Rosen and Peter Bierman's article, "Potato Fertilization on Irrigated Soils," the full text of which can be found at www.extension.umn.edu.