Free Thinking: Humboldt, soil, gardens and Frank WalterSeries 1, episode 0On World Soil Day, Jade Munslow Ong looks at garden paintings from Antigua, Alexander von Humboldt, trees and soil research, and talks to Sainsbury Centre director Jago Cooper Click to see when Free Thinking, Humboldt, soil, gardens and Frank Walter is coming up on UK TV |
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