Given the importance that farmer’s place on optimising pasture response there have been surprisingly few attempts by the main fertiliser companies to optimise the performance of urea itself.
Fertiliser industries have long claimed that ammonia volatilisation is low in NZ conditions. However scientific data reports losses of 4.2 – 33.3%. Losses of less than 10% would only occur on highly acid soils with a pH of <5.3. Few dairy farms, however, operate at soil pH levels below this range.