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Lapel, In | I assume you are talking about urea ? Urea is anhydrous ammomia that is dropped in a tall tower where it salts out. 28% or UAN is part urea. Nitrogen is pretty much nitrogen and needs lime to neutralize the effects of it with ammonia using the most lime( or calcium )in particular. 28 or 32 is much less likely to volotalize if the weather is hot and dry.Its best if you can get a rain on it soon after application without some form of tillage to cover it. This is particularly true with Urea. | |
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advantage of 28 or 32 over granular fertilizer
