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Grass Pro is a nitrogen and sulphur fertiliser developed to help boost your pasture growth. By applying sulphur alongside nitrogen applications to pasture this winter, growers may see a potential increase of dry matter production of grasses and help reduce feed shortages this winter.

Nitrogen (N) fertiliser is a management tool for manipulating seasonal pasture production, as all plants need N for growth. Clover is more temperature sensitive than ryegrass and does not fix much N through the winter months.

Once the soil temperature is below around 9°C (at 10cm) the supply of N from clover is limited, yet perennial ryegrass can continue to grow and respond to N down to around 4°C soil temperature.* This means that the grass component may be short of N during the cooler months of the year.

In South Eastern Australia & Tasmania, clover will only fix adequate quantities of N between September and March, depending on the season and assuming that clover makes up at least 25 to 30% of the pasture. Unfortunately, it is during the cooler period of restricted pasture growth when farmers may require more pasture.

Sulphur is essential for the formation on amino acids, the building blocks for proteins which are needed for growth and development in plants and animals. Again, Sulphur is required to convert Nitrogen to plant dry matter.**

As grass grows both Sulphur and Nitrogen are used together so a Sulphur deficiency will decrease nitrogen use efficiency and could potentially result in a reduced yield. Thus, Sulphur is an important nutrient for grassland and is closely associated with Nitrogen uptake and efficiency.