Urea is a commonly purchased, dry, granular fertilizer with a grade of 46-0-0. Urea is an uncharged compound that can be moved into the soil with percolating water. After application, urea is hydrolyzed with water (i.e., undergoes a chemical breakdown due to a reaction with water) into ammonia (NH 3) and CO 2.

Sidedress inject anhydrous ammonia or urea-ammonium nitrate (UAN) solutions. Injection can be effective between every row or between every other row, and can be accomplished with cultivation equipment. Surface dribble UAN between corn rows, or between alternating rows.

Determine the best timing, placement, and form of urea fertilizer for optimal nitrogen (N) use efficiency in corn. • Greater nutrient use efficiency by corn (Zea mays L.) could the rate of nutrient loss, and enhance crop yields.

Urea, with its high nitrogen content, is often preferred as a fertilizer in agriculture. When applied to cornfields, it undergoes a transformation in the soil, where it converts into ammonium and nitrate, forms that plants readily absorb. This transformation is fundamental for maximizing corn yields. The significance of urea cannot be overstated.

The most commonly used nitrogen fertilizers for corn production in North America are anhydrous ammonia, urea, and urea-ammonium nitrate solutions. Urea is hydrolyzed by soil bacteria releasing two ammonia molecules (NH 3) which can be lost to the atmosphere if this reaction takes place on the soil surface.

2020年3月12日 · Fertilizers such as urea and UAN solution can be broadcast and incorporated with normal tillage before planting. Incorporating or injecting rather than leaving the fertilizer on the soil surface can prevent volatile N loss from granulated urea or urea in UAN as it converts to ammonium, or reduce runoff if a rapid rainfall (or snowmelt) event ...

2005年2月11日 · Use of urea fertilizer as an N source can result in N losses if the fertilizer is not incorporated. This includes urea and urea-ammonium nitrate solution fertilizer (UAN). Loss of urea N due to volatilization may be eliminated by immediate mechanical or rain incorporation (Table 1).

As a result, granulated urea has become a more suitable material for fertilizer blends. You can apply urea to soil as a solid, solution or, for certain crops, a foliar spray. Usage involves little or no fire or explosion hazard. Urea’s high analysis – 46 percent N – helps reduce handling, storage and transportation costs over other dry N forms.

2015年4月24日 · Injection into the soil or dribbling the nitrogen fertilizer between rows are the best ways to sidedress because this application can reduce volatilization of urea and protect the crop from foliar damage. If ammonia is used for the application, it is important to watch soil conditions to ensure that the knife track closes properly to avoid ...

Nitrification inhibitors are effective for inhibition of the urea and ammonium in the fertilizer but not for nitrogen already in nitrate form (25% of the N in UAN).