UAN is a modern liquid fertilizer consisting of a mixture of three forms of nitrogen (nitrate, ammonium and amide).
This combination creates the effect of prolonged feeding, which starts immediately after application and continues for some time, depending on the activity of bacteria and soil temperature. An additional plus – there is no free form in UAN that can be released as vapor into the atmosphere. The presence of the ammonium form makes it necessary to think about sealing the application site, since dry and hot weather can contribute to the loss of nitrogen from the application site. But even in this case, liquid fertilizers show excellent results, in comparison with solid – 10% loss in liquid, versus 30-40% in granular.
The application of liquid fertilizer makes it technologically easier to accurately maintain a given application rate per unit area. But this should be followed by a special technique – therefore, the self-propelled sprayer "Vodoley" was developed, equipped with an on-board computer with a GPS module and an electronic fertilizer supply system.
Foliar nutrition is needed for plants at the stage when there are already sprouts. Conventional machinery after passing through the field will leave a lot of damaged plants. To safely process plants, the Aquarius sprayer Equipped with low pressure tires. They exert pressure on the soil of 100-160 g/cm2, therefore, after passing through the field of such a technique, the plants rise for 2-3 days. The operation of the pump is synchronized with the speed of movement of the equipment across the field, so even if the latter slows down or accelerates, the desired level of application of UAN per hectare remains the same.
From the solution on the leaves, the amide form of nitrogen is absorbed first. Drops that fall on the ground will become ordinary soil fertilizer. CAS allow you to quickly adjust the nutrition of plants in those moments when there is intensive growth, and the root system cannot cope with the needs of the plant.
An important benefit of UANs is that they do not pollute the environment. There is also an improved nitrogen uptake during drought. Another plus – UAN is not flammable and explosive (unlike saltpeter in bags).
CAS applies in the following terms:
Agronavigator "Aquarius 2" thanks to the parallel driving function, it allows you to apply fertilizer precisely to those areas where they are not yet available. When hitting an already treated area, the place of re-treatment is immediately highlighted on the screen so that the sprayer driver can correct the trajectory of the equipment.
Liquid fertilizer can be mixed in the same tank with other plant treatment components. Therefore, in one pass through the "Aquarius" field will process several substances at once, which is cost-effective and saves the site from unnecessary passages of equipment.