(par 5.1.2) Salinization
http://people.oregonstate.edu/~muirp/saliniz.htm Salinization refers to a build up of salts in soil, eventually to toxic levels for plants. (3,000 – 6,000 ppm salt results in trouble for most cultivated plants.) Salt…
(par 5.1.2) Soil salinity (taken from wikipedia)
http://en.wikipedia.org/wiki/Soil_salination From Wikipedia, the free encyclopedia Visibly salt-affected soils on rangeland in Colorado. Salts dissolved from the soil accumulate at the soil surface and are deposited on the ground and…
(par 5.1.2) Slash-and-burn (taken from wikipedia)
http://en.wikipedia.org/wiki/Slash-and-burn From Wikipedia, the free encyclopedia Not to be confused with scorched earth. “Occupational burning” redirects here. It is not to be confused with occupational burnout. Slash-and-burn practices in Eno, Finland, 1893 This…