Liquid Zinc Sulphate

Zinc deficiencies are common throughout the broadacre regions of Southern Australia. Zinc is essential for promoting metabolic reactions and is involved in the synthesis of plant growth substances and enzyme systems. It is also critical in Chlorophyll production.

Zinc Sulphate solutions can be applied directly to the soil as a component of a starter fertiliser or as a foliar application.

Analysis w/v
Zinc (Zn) – 160g/l
Sulphur (S) – 79g/l
pH – 4-5
Specific Gravity (SG) – 1.37
Sulphate Labels Zinc

Directions for Use

Soil Injection

Zinc is not mobile in the soil and needs to be placed near the emerging plants root system or if a blanket spray is used it needs to be evenly distributed over the soil surface and thoroughly cultivated into the topsoil.

Zinc deficiencies occur mainly in high pH soils and can be effectively locked up especially in calcareous soils, however consistent applications of robust rates does build up Zinc levels in the soil.

Soil Injection Rate (l/ha) Water Rate (l/ha) Comments
Soil Surface Application5-12 litres/ha--
Furrow Injection2-8 litres/ha40-100 litres/haUnder or to the side of seed

Foliar Spray

Foliar sprays can be a most effective way of applying zinc sulphate solution, however it is critical that applications are early and best within 6 weeks of seedling emergence.

Foliar Spray Rate (l/ha) Water Rate (l/ha) Comments
Cereals1-3 litres/ha70-100 litres/haFrom 3 leaf stage
Canola1-3 litres/ha70-100 litres/ha-
Beans + Legumes1-3 litres/ha70-100 litres/ha-
Medic Pastures1-3 litres/ha50-100 litres/ha-

Deficiency Symptoms

  • Leaf tiger striping (pale green stripe down either side of the main vein)
  • Pale yellow patches on new growth
  • Brown lesions on foliage on severely deficient plants
  • Stunting