Farmers should wait until soil temperatures drop to the appropriate temperature before applying fall nitrogen, a University of Illinois agronomist says.
Fertilizer was a painful input for most no-tillers in 2008. Growing world demand (up 14% — a growth equal to the entire U.S. market, according to The Fertilizer Institute), high production costs, increased transportation expense and a faltering U.S. dollar all contributed to record-high prices for major nutrients.
Having no-tilled for 8 years, Tim Goodenough has moved away from using anhydrous ammonia, 28 percent nitrogen and urea as nitrogen sources. Since 2005, he’s successfully used the ESN (Environmentally Smart Nitrogen) product. This polymer-coated nitrogen is a slow release product that is activated by moisture and heat, says the West Salem, Wis., grower who no-tills 1,300 acres.
A new fertilizer additive designed to protect granular or liquid nitrogen applications from leaching and volatilization for an entire growing season is being marketed by Specialty Fertilizer Products.
With no-till's high residue levels, a challenging environment is created in which to effectively manage your nitrogen. In any given year, you can expect nitrogen loss from immobilization, denitrification, leaching or volatilization.
Like it or not, succeeding in the new millennium is going to require you to make some changes in your no-till program, both in your thought process and in your crop management system.
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Franck Groeneweg, who no-tills a variety of crops on more than 12,000 acres near Three Forks, Mont., shares how his massive Johnson-Su bioreactor system allows him to apply compost extract in furrow during planting season.
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