Good soil fertility is also important for competitive pastures. Nitrogen, sulphur and phosphorus soil deficiencies are in much of NSW key deficiencies to address if soils are low in them. Legumes, which build soil nitrogen, will only do so if deficiencies like sulphur are corrected. Correcting nitrogen deficiency, via legumes or fertiliser, or a combination of both, commonly leads to tropical grasses doubling or more in productivity, and combine with being more competitive against weeds.
