You are here

urea loss

Catalogue: Ground Cover
Top-dressing nitrogen onto crops, fallows and pastures may not be as risky as is generally thought if rain does not fall soon after application... Nitrogen volatilisation losses were assessed in 15 paddocks covering four scenarios: top-dressing wheat; autumn fallow broadcasting ahead of winter cropping; spring fallow broadcasting ahead of summer cropping; and autumn and spring fertiliser application to a grass-based pasture... How much is lost depends on a range of factors including rainfall amount, soil moisture, temperature, pH, naturally occurring lime in the soil, ground cover, wind, soil-clay percentage and fertiliser type...
Related categories:
Catalogue: GRDC Updates
In 2011 we measured nitrogen volatilisation losses in 3 scenarios; (1) top-dressing wheat, (2) spring fallow broadcasting, and (3) autumn and spring fertiliser application to a grass pasture... We applied nitrogen fertilisers at locally relevant rates to 50-metre-diameter circular plots using either hand spreading (solid fertilisers) or a quad bike sprayer fitted with streaming-bar nozzles at 10 cm spacing (liquid fertilisers)... We used a grass pasture near to trial the method in autumn before the main trials began, and included a tropical grass pasture near Caroona in spring when measuring paddocks 5 & 6...
Related categories:

Associated key phrases