Small-holder farmer Nafetalai Makaui from Houma increased production on a one-acre plot through a fertigation system. Photo: PHAMA Plus For farmer Nafetalai Makaui from Houma, improvements to Tonga’s watermelon export pathway have translated into practical changes on the ground. Working with Nishi Trading under a PHAMA Plus-supported fertigation pilot, he increased production on a one-acre plot from 8 tonnes to 21 tonnes, enough to fill a 20-foot shipping container.