Analysis: 46% Nitrogen, 0.4%* Biuret

*0.4% Biuret is the Typical Analysis of this product, however individual consignments may vary slightly, but will not exceed 0.5%

Bag Size: 25kg

Campbells Nitro Lo-Bi Urea only contains 0.4% biuret*. This makes it a low biuret Urea suitable for a wide range of foliar Nitrogen applications in horticulture and agriculture.

Nutrient Form:

The Nitrogen in Nitro Lo-Bi is in the form of Urea, specifically with a low Biuret content. Biuret is present as an impurity of Urea, formed during the manufacturing process, and high levels can be harmful for foliar application, possibly causing plant damage.


Campbells Nitro Lo-Bi Urea is recommended for foliar applications as it has a low Biuret concentration, making it safer to use.

  • Standard Urea has a higher Biuret concentration, which can be toxic to plants, especially if applied to foliage in high concentrations
  • Plants are not able to readily metabolise Biuret and therefore the presence of elevated levels in plant tissue causes growth reduction and plant damage
  • In sensitive crops (most horticultural crops) or perennial crops (where repeat applications with Biuret containing Urea can accumulate), the selection of Nitro Lo-Bi Urea is strongly advisable


Campbells Nitro Lo-Bi Urea as a foliar spray can provide a very quick Nitrogen response in plants. Foliar Lo-Bi Urea can be useful during periods of very high crop demand or when root Nitrogen uptake is restricted. Lo-Bi Urea is also sometimes used in conjunction with foliar applied trace elements, such as Campbells Bud-wiser.


General rates vary dramatically across horticultural crops compared to broadacre alternatives. For general Tree crop rates, apply at a rate of 0.5kg/100L of water, but for general Vegetable rates this can be increased to 1.0kg/100L of water. In Broadacre crops like Cotton, rates may be as high as 10 – 15kg/100L of water, and Cereals at 20 – 30 kg/100L, as these are less sensitive crops. Before application, seek advice from your Campbell’s distributor or your local agronomist.