17% N, 20% P, 1% S
Supplied ex Hastings Warehouse or through direct shipment to any NZ port
Supplied in bulk or 1250 KG bags (included in price)
Use in: Autumn, Spring
Click here for freight rates to your farm
DAP contains a near 1 : 1 ratio of nitrogen to phosphate. Nitrogen is in ammonium form and phosphorous is in ammonium phosphate form. Ammonium nitrogen is less susceptible to losses when compared to urea nitrogen. Ammonium nitrogen can be up taken directly by plants but more often is bound to clay particles in the soil where it will over time be transformed to nitric nitrogen.
Why Use DAP:
- DAP is suitable for use when crops / pastures require equal amounts of phosphate and nitrogen.
- DAP is the cheapest form of phosphate when nitrogen is also required and full value is obtained out of the nitrogen portion.
- Compared to other phosphate products DAP contains a high percentage of phosphate meaning freight and application costs are generally cheaper compared to alternatives.
Precautions when applying DAP:
- No precautions
Nitrogen's role in crops and pastures:
- Nitrogen increases the protein content in plants through the vitamins, amino acids and energy systems in which it aids.
- Nitrogen is necessary for chloropyll synthesis, the process in which chlorophyll is increased in the plant giving plants a dark green appearance.
- It is through chlorophyll that sunlight is absorbed as energy into the plant making chlorophyll an important part of photosynthesis where sunlight is absorbed and stored in the plant as sugars and proteins.
- Hence, Nitrogen is an important part of photosynthesis.
Phosphate's role in crops and pastures:
Phosphorus is an essential compound of Adenosine Triphosphate (ADP), the energising component driving plant development. Phosphorus plays an important role in photosynthesis as it enables plants to store and metabolise sugars, (the energy created in photosynthesis).The physical attributes in plants that are aided by phosphorus are:
- Larger root growth.
- Earlier formation of plant shoots.
- Improved stalk and stem strength in crops.
- Improved fruit, vegeatable and grain quality.
- Promted seed formation in crops.
- Increased resistance to moisture and colder temperatures.
Sulphurs role in crops and pastures:
- A structural component of protein and peptides.
- Active in the conversion of inorganic N into protein.
- A catalyst in chlorophyll production.
- Promotes nodule formation in legumes.
- A structural component of various enzymes.