ENVR 1000 Lecture Notes - Lecture 5: Multiple Cropping, Shifting Cultivation, Air1

• School: University of Manitoba
• Department: Environment
• Course: ENVR 1000
• Professor: Goodman

Document Summary

Subsistence: production is small with goal to produce enough for family and local community: common in developing nations, popularity sporadic in developed nations, may find shifting cultivation popular where the location is abandoned leaving it to recover. Slash and burn: tropical rainforests are cut and burned to remove the debris and use the ash as fertilizer to grow crops. Productive soils last for only a short period of time before the farmer is forced to abandon the location. Forest regrowth fails due to poor soil development. Industrialized: crop yields enhanced through large inputs of resources; species diversity is not a priority. Enhanced crop production to feed population and avoid starvation. Require the introduction of effective technologies such as: High yield crops and new crop varieties (wheat and rice) Multiple cropping (more than one crop each year) Substantial financial investment for farmers and less developed nations. Increased pollution and erosion, more pressure on water systems, and higher rates of energy consumption.