Tephra
Farming Ancient Volcanic Soils
12 Feb 2015
When a farmer embarked on an experiment to excavate deep volcanic layers and bring them to the top, he found that the ancient soils produced greener pastures. Audio
World Soil Day - New Zealand's Volcanic Soils
4 Dec 2014
To mark World Soil Day, soil scientists head on a fieldtrip to explore New Zealand's volcanic soils. Audio