N leached under autumn urine plus the 200N fertiliser rate is plant root proliferation in response to the split fertiliser applications prior to urine application. Before the autumn urine application, the lysimeters had received 2 split applications of fertiliser, and prior to this, the lysimeter collection site had not received fertiliser for over a year. When plant roots encounter a zone of nutrients, they tend to proliferate within it by deploying primary and secondary lateral roots, and expand their capacity for nutrient uptake