Cropmaster 20 is a 50:50 blend of DAP and Ammonium Sulphate. These components all have similar particle size (2-4mm diameter) which minimises segregation during transport and spreading.
DAP can vary from light brown to black while ammonium sulphate varies from reddish brown to white granules.
Although Cropmaster 20 generally mixes well with other products, it is not compatible with the following:
Superphosphate, Sulphur Super 30 and Magnesium Oxide
Cropmaster 20 can be compatible with the following under certain circumstances:
Segregation may occur when mixed with product with differences of particle size.
Refer Compatibility Chart.
Provide nitrogen (19.3%), phosphate (10%) & sulphur (12.5%) for field crops, greenfeed brassicas, sheep, beef and dairy pasture
A cost effective product providing readily available nitrogen in the ammonium form, with phosphate & sulphur similar to that in Superphosphate
Commonly used in cropping situations where potassium is not required
Cropmaster 20 is cost effective, providing readily available nitrogen, phosphate and sulphate with good spreading and flow characteristics. Because all Cropmaster products contain nitrogen, correct calibration of application equipment is important.
Cropmaster products are blends - they are made up of separate granules of each different nutrient. In compound fertilisers like the Nitrophoska Products range each granule contains all the different nutrients. For this reason blended fertilisers are usually a lot cheaper than compound products.
As long as the granules in the blend are of a similar size (as they are in the Cropmaster range) the is usually little difference in the performance of a compound compared to a blend. However, in some intensive production situations (e.g horticulture) small differences can be important and it may more beneficial to use a compound.
Cropmaster 20 is a cost effective fertiliser providing readily available nitrogen in the ammonium form, while the phosphate and sulphate content is similar to that found in Superphosphate. Cropmaster 20 was originally designed for spring cereal cropping. However, it has a range of other uses such as greenfeed brassicas, maize, grass re-establishment, and pasture for hay/silage. Often used in cropping situations where potassium is not required.
The high sulphur levels in forage brassica crops obtained from Cropmaster 20 may result in animal health problems. If a Cropmaster fertiliser is required for brassica production, choose one of the low sulphur products, e.g. Cropmaster DAP, 9, 11, 13, or 18.
Spring cereal sowing 180-375kg/ha, Autumn grass seed 125-200kg/ha, greenfeed brassicas 150-250kg/ha, sowing new grass 100-180kg/ha if drilled. Where more than 200 kg/ha being applied, the balance should be broadcast. Clover seeds are extra sensitive to contact with Cropmaster 20. If direct drilling, lower the fertiliser rates to <90 and <125kg DAP/ha for clover and cereals, respectively.
100-125 grams per tree at planting (applied in a spade slot about 15cm away from the tree), sidedressing (e.g. shelterbelts) if required.