lecture 11- soil notes

lecture 11- soil notes - Soil Conservation (Feb. 28, 2008)...

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Soil Conservation (Feb. 28, 2008) 1. What is soil? A complex mixture of weathered inorganic minerals, partially decomposed organic materials, and a host of living organisms. a. Pedology: study of soil b. Pedosphere: soil ecosystem (think biosphere or lithosphere) 2. Benefits of soil a. Nutrient capture, cycling and recycling b. • Climate control (temp. / water vapor / carbon sequestration) c. • Habitat for animals and plants, esp. primary production d. • Support structure for trees, buildings e. f. Soil is important in science and business: Archeology, Biology, Chemistry, Dendrology, Engineering, Forensics, Geography, Zymurgy g. Big benefit to us: Agriculture/Food h. Soil : The most important ecosystem on Earth 3. History of agriculture a. Before 10,000 BCE: humans were hunters/gatherers b. 10,000 BCE to ~1950: traditional agriculture c. 1950 to present: “industrial” agriculture d. Agriculture developed all over the world (see book Figure 9.3) 4. Soil forming factors (see book table 9.1 – important!)
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lecture 11- soil notes - Soil Conservation (Feb. 28, 2008)...

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