An Oxfordshire farm has successfully slashed nitrogen rates by 60kg N/ha with no yield detriment thanks to the addition of a carbon rich crop spray and urease inhibitor to each liquid fertiliser pass.

St Stithians College matriculants, from left, Christine Masters, Isabella Hayworth, Zoe Cuyler and Aerin Moravec, celebrate as they collect their matric results yesterday in Sandton. Picture ...