In dust-dry regions where the only sound in the baked silence is the trickle of precious irrigation water, in rain-drenched jungles where vegetation grows thick and tough, from eroded wastelands and along carefully tended hillside terraces comes the call: how can we grow more food? To learn the answer and put theoretical lessons to practise, students from around the world come to the heart of southern Canada's fertile farmland and attend the Ontario Agricultural College. The largest in the Commonwealth, the agricultural college at Guelph has 13,000 graduates at work throughout the globe. In Africa, India, Malaya and a score of countries they are passing on the knowledge gained in classroom, laboratory and experimental farm field. Today, Ontario's agricultural college (founded in 1874 with but 28 students in a single building) has 50 buildings for its 1,600 students. To gain their degrees students study science, botany, zoology, chemistry, microbiology, engineering, veterinary medicine, horticulture, economics and business. On hundreds of acres of college farmland they experiment with plant breeding, hydrology, soil fertility, livestock, feeds and other aspects of scientific agriculture. From the shady, tree-lined walks of the Guelph campus in summer and its dazzling snowscapes of winter, the student from overseas returns home ready to guard against waste, work with nature for a richer harvest.