Granulated urea fertilizer is a basic nitrogen fertilizer. Used for non-root feeding in the form of foliar spray with an aqueous solution. The dose and concentration of the solution should be chosen according to the species and phase of development of fed plants. Root-fed with urea is also possible, however, due to the necessity of transition as a result of enzymatic hydrolysis from the amide to ammonium form, which is available to plants and then into the nitrate form, the absorption process is much longer and slower than for foliar application. The scope of application of urea as soil fertilizer is very wide and covers practically all crops. It can be used both pre-sowing and top dressing. The effectiveness of using urea as a source of nitrogen on very acidic, strongly alkaline soils or just after liming can be much lower than on comparable acreages with neutral pH soils. Urea as a nitrogen fertilizer is especially recommended for vegetables and fruit because of its low nitrate potential. Urea stays in the soil in a form that is available for plants for a long time. As a result of its use, we do not observe excessive accumulation of harmful nitrates in soil and plants. Also, groundwater is not contaminated with these dangerous compounds as a result of the use of urea. Another advantage of this nitrogen fertilizer is the support of phosphorus uptake from soil and reduction of excessive potassium uptake. Administration of nitrogen in this form causes lush rooting and faster plant growth since the post-emergence period compared to other forms of application of this element. Feeding urea in soil form increases the resistance of plants and increases yields and their biological value.
- Appearance Solid, in the form of white granules.
- Odor: Slightly noticeable smell of ammonia.
- Odor Threshold: Not determined.
- pH (20 ° C): 9.2-9.5 (100 g / l solution).
- Melting point / freezing point: Approx. 134oC.
- Density 1.33 g / cm3.
- Solubility (20 ° C): Dissolves in water (624 g / l). It dissolves in organic solvents: acetone, glycerol, ethanol, chloroform, xylene.
- Partition coefficient: n-octanol / water (20 ° C): -1.73
- Decomposition temperature:> 130 ° C
- Explosive properties: Does not show.
- Oxidizing properties: Does not show.