Physical Description:
Urea has the highest concentration of quick release nitrogen (N) in any solid fertiliser available in New Zealand. Nitrogen is used on pasture to boost dry matter production to meet projected feed deficit hay or silage yields. Urea consists of white, uniform granules.
Uses:
Urea is the most concentrated and cost effective N source, generally making it the lowest cost form of N on the market. It is suitable for all agriculture, horticulture and forestry farming systems.
Benefits:
It is most commonly used to promote late autumn and early spring growth. In arable and horticultural situations, it is used to optimise the yield and quality of produce, as pre drill (broadcast) applications to annual crops and for sidedressing of annual and perennial crops.
Application:
Urea is usually spread at rates of between 40 and 300 kg/ha, but actual spreading rates will vary according to farm type and region - it is best to confirm rates with a Field Officer. It is better to make several small to medium applications at intervals to minimise leaching losses and increase efficient use of the N applied compared with single heavy applications. During summer, Urea should be spread just before, or during rain to reduce possible losses from volatilisation (process where nitrogen is lost to the atmosphere as ammonium gas). Urea should not be mixed for any length of time with other fertilisers as problems of physical quality may result.
Because of the high N concentration in Urea, it is very important to achieve an even spread. Make sure that the application equipment has been correctly calibrated and is properly used.
Do not drill on contact with or close to seed, due to the risk of germination damage
Urea dissolves in water for application as a spray or through irrigation systems. Please note that mixing with water may require some time. Dissolve urea in water at a 50:50 ratio, and apply as a spray at the end of the day to reduce the risk of leaf burn by the urea.
Storage & Handling:
Like most Nitrogen products, Urea absorbs moisture from the atmosphere. Therefore it is should be stored either in closed/sealed bags on pallets, or if stored in bulk, covered with a tarpaulin. As with most solid fertilisers, it should also be stored in a cool, dry, well ventilated area.
Source:
Urea is sourced from Saudi Arabia, Kuwait and Bahrain.
Safety Data Sheet (SDS):
Urea