ENV100H1 Lecture Notes - Lecture 25: Overgrazing, Overexploitation, Soil Salinity

• School: UTSG
• Department: School of Environment
• Course: ENV100H1
• Professor: Barbara Murck

Document Summary

Mechanization of farms around the world large-scale irrigation inorganic fertilizers: ability to industrially produce nitrogen in a biologically useable form knowledge of plant breeding rise of genetics. Better farming methods to alleviate world hunger started in mx in 1940s (dr. norman borlau) increased wheat yields via selective breeding spread to india and pakistan, rest of world. Pakistan and india almost doubled their production from 1965-1970. Made a big difference in getting food to people. The pro(cid:373)ise of the gree(cid:374) re(cid:448)olutio(cid:374) (cid:449)as to . Goals were approached through both intensification and extensification of agricultural production. Intensification force a plot of land to produce more yield: extensification taking land not previously in agricultural production, but bringing marginal land into production. We are also cutting into habitats and ecosystems that are good for other reasons. Farming was modernized: modernizes society as a whole. Pesticides, irrigation, fertilizers, new strains are a mixed blessing.