Limus® Clear is a new urease inhibitor for use with liquid fertiliser (UAN) that minimises nitrogen losses and supports optimal nitrogen availability for your crop.
- Improves nitrogen use efficiency (NUE) by minimising nitrogen losses from ammonia volatilisation
- Reduces ammonia emissions by up to 98%
- Increases yield compared to untreated liquid fertiliser (UAN)
- Contains two actives (NBPT + NPPT) for optimal efficacy
|Active ingredient(s)||NBPT (N-butyl-phosphorothioic triamide)|
NPPT (N-propylyl-phosphorothioic triamide)
|Pack size||5 litres in outers of four|
|Crops||Any crop treated with UAN (urea ammonium nitrate)|
|Rate of use||1.0 litre per 1000 litres UAN|
|Timing of use||Whenever UAN is applied to the crop. Limus® Clear is particularly effective when temperatures are warm with no rainfall in the 7 days after application, on alkaline soils and on dry soils.|
Why Limus® Clear?
Nitrogen can be lost as ammonia following the application of liquid fertiliser (UAN). UK research suggests average nitrogen losses from UAN range from 11-14%. The amount of nitrogen loss in this research was dependent on environmental conditions, including soil water content, soil temperature and rainfall.
In general, factors that increase the risk of ammonia (nitrogen) losses include
- Warm temperatures
- Dry soils
- Less than 10mm of rainfall with 48 hours of application
- Alkaline (high pH) soils
Ammonia is an air pollutant, which is currently being targeted by the government’s ‘Clean Air Strategy’. The Code of Good Agricultural Practice (COGAP) for reducing ammonia emissions supports the use of urease inhibitors with urea-based fertilisers as one way of reducing ammonia. In the future, legislation may be introduced which makes this use compulsory.
Limus® increases yield of UAN
By reducing ammonia emissions, more nitrogen is available for crop uptake.
Across 21 BASF trials on a range of crops, this resulted in a 4% increase in yield, compared to liquid fertiliser without the addition of Limus® Clear.
How do urease inhibitors work?
Urea is not readily plant available and first needs to be converted into ammonium. This is done by urease enzymes in the soil that bind to the urea. Without sufficient rainfall post application, the ammonium concentration around the site of application increases, leading to a localized increase in soil pH. This converts the ammonium to ammonia gas. Urease inhibitors temporarily bind to these enzymes, preventing the localised pH spike and reducing the losses of ammonia.
What makes Limus® Clear unique?
Different urease enzymes require different urease inhibitors. Limus® is the only urease inhibitor available with two active ingredients (NBPT and NPPT), enabling it to bind to a wider variety of urease enzymes and more effectively minimise losses.