New Zealand: The council soil and science programme of Southland chooses satellite imagery to map the extent of winter crops. Winter crops such as swedes and kale are known to increase levels of soil contaminants including phosphorous, E.coli, nitrogen and sediment.
With the help of Satellite mapping, it will be easier for the council to improve nutrient loss estimates at a catchment and regional scale and understand how many hectares of winter crops were being grown. That information would feed into the council's Water and Land 2020 project – the council's response to the National Policy Statement for Fresh Water, informed George Ledgard, the coordinator of the council soil and science programme.
Source: Otago Daily Times