Urea_2

Urea

$615.00

We will be holding regular stocks of Urea starting January 2019
Icons-shipping
Hastings Store – Product in stock, get in contact for direct shipment as shipments arriving monthly.
All Other Stores – Currently shipping to order.

N
46%
P
0
K
0
S
0
Ca
0
 Mg
0

 

Product Description

Icons-nutrient
46% N
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Supplied ex Hastings Warehouse or through direct shipment to any NZ port
Icons-bag
Supplied in bulk or 1 tonne bags (included in price)
Icons-seasonal
Use in: Summer, Autumn, Winter, Spring
Icons-freight
Click here for freight rates to your farm

 

Urea has the highest percentage of Nitrogen of all readily available fertilisers supplied in the New Zealand market. Urea nitrogen is in the form of Urea (Amide) form and first must be broken down by soil enzymes before it is able to be taken by plants.

 

Why Use Urea:

  • When applied under the right conditions Urea will provide crops and pasture with the most cost effective form of Nitrogen.
  • Nitrogen moves quickly through soils and plants are quick to utilise available Nitrogen meaning Nitrogen is often the most limiting factor when it comes to plant and pasture growth.

Precautions when applying Urea:

  • Avoid application in the heat of the day where possible.
  • Apply pre rain fall/irrigation (ideally 10ml within 10 hours) to avoid any losses through volatilisation.
  • Avoid application before large amounts of rainfall (40ml plus within 10 hours) to reduce any leaching.
  • Other nitrogen sources should be considered when applying to acidic soils. Acidic soils further promote Nitrogen losses through volatisation and Urea further increases soil acidity (decreases soil PH).

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.

More Information

Urea Nitrogen Cycle Explained

urea-explained

Hydrolysis is the process where Urea Nitrogen is converted to Ammonium Nitrogen. This process rapidly increases the PH in the surrounding soil area, subsequently promoting nitrogen loss through Volatilisation once the Nitrogen has converted into Ammonium form.

Volatilisation is the loss of N through the conversion of Ammonium to Ammonia Gas.

Factors increasing these losses are:
  • Higher soil PH levels.
  • Conditions such as heat and wind that favour evaporation.
  • Applying Urea to damp soils where the granule is broken down but not absorbed into the root zone.
How can this loss be minimised:
  • Avoid applying products in the heat of the day where possible.
  • Target applications just prior to rainfall.
  • Avoid applying urea to damp soils, except when prior to rainfall.

Nitrification is the process by which microorganisms in the soil convert Ammonium to Nitrate to obtain energy.

Denitrification occurs when Nitrate is converted to gaseous forms of nitrogen as a result of soil bacteria using nitrogen as an oxygen source in oxygen deprived soils.

Factors increasing these losses are:
  • Heavily compacted soils.
  • Poorly drained soils.
How can this loss be minimised:
  • Aerate soils and ensure adequate drainage where possible.
  • Avoid applications after heavy rainfall and when soil is still saturated.
  • Reduce application rates on heavily compacted and poorly drained soils.

Leaching occurs when too much water moves nitrogen below the root zone.

Factors increasing these losses are:
  • Porous soils.
  • Applying nitrogen before heavy rainfall.
How can this loss be minimised:
  • Avoid applications before large amounts of rain.

Immobilisation occurs when organic matter within the soil uptakes the Nitrogen in the forms of Ammonium and Nitric before the intended pasture/crop. Immobilisation is offset by the process of mineralisation when the organic matter later breaks down releasing the nitrogen back into the soil.

 

Additional Information

Nutrient Base

Nitrogen

Application Type

Liquid, Solid

Seasonal Use

Autumn, Spring, Summer, Winter