The Flying Doctors: Sophie discovers how soil fungus is being used to combat a disease in cherries, and how the delivery method being used is creating quite a buzz. Adding Calcium: Tino explains how limes and gypsum correct nutrient deficiencies. Two Paths: Costa visits the Hawkesbury in Sydney's west to see how land use in the region has changed over the years. A Grand System: Angus visits a pair of farmers in country NSW who are using a large-scale composting system to increase the health of their soil and crops. Rock Minerals: Josh explains exactly what rock minerals are, how to use them and why they're great for the garden. Chasing Orchids: Clarence meets up with a native orchid hunter for find out how these unique Australian plants have adapted to grow both in and out of our poor soils.