At the block level Leaching-other is the leaching from the inter-urine patch areas. It incorporates the effects of soil fertiliser, effluent and other nutrient input sources. Leaching - other is reported in the Nutrient Budget under Leached from root zone.
On pastoral blocks, in most cases, leaching from the inter-urine/background model is less than that from the urine patch model because pasture is efficient at removing N. The exception is usually associated with high inputs of N such as fertiliser or effluent and in those cases, N 'leaching-other' can be mitigated by reducing N inputs. However, 'leaching-other' can be particularly affected by the level of inorganic N in the soil, the level of drainage occurring in the block and soil type through Profile Available Water (PAW).
On grazed cropping blocks, the amount of N leaching-other can be influenced by fertiliser rate and timing, effluent rate and timing, cultivation timing and method, crop yield, and harvesting of the crops.
In the farm level nutrient budget, leaching - other is the area-weighted average background losses from the blocks, plus losses from lanes, unlined standoff pads, effluent storage system, wintering pads and silage stacks. Some of this loss may occur as runoff, particularly for P, but there was insufficient information to split between runoff and leaching when the model was developed.