Creating profit maps across Craige Mackenzie's 200ha of intensive arable production in Ashburton, Canterbury, New Zealand has been a key step in understanding where production can be intensified - and where inputs need to be cut back as the soil is just not capable of yielding higher. Like most growers, Mr Mackenzie started with yield mapping. "It was a huge wake-up call - we knew we had variation, but we didn't know where it was and how big it was." Read More