Too Warm for Anhydrous Application

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Iowa crop producers are being encouraged to wait for much colder weather before applying anhydrous ammonia to their fields. Barbara Stewart, State agronomist with USDA’s Natural Resources Conservation Service, SAYS:

Actuality (WMA, 383 KB, 00:17)

(Transcript) “Right now it’s too warm. Anhydrous ammonia applied now, when soil temperatures are above 50 degrees, increases the risk of nitrates leaving farm fields and polluting groundwater and streams.  That can be a waste of fertilizer and increase health risks for others.”

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stewart recommends following Iowa State University Extension advice and only apply anhydrous ammonia to farm fields when soil temperatures are below 50 degrees at a 4 inch depth. IN IOWA That normally occurs in November.

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