session20

session20 - Nutr 241A Agricultural Science and Policy I,...

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S e a r c h Readings: Session 20 Authors : Kathleen Merrigan, Ph.D., William Lockeretz, Ph.D. Readings T emperate Agroforestry Systems. Agroforestry in North America and its role in farming systems . P.A. Williams et al. (1997). Key Questions Agroforestry What are some of the key features of the traditional agroecosystems that existed before the European settlers arrived? Do they share anything in common with the present day agroforestry systems? Why are farm woodlots called 'cash reserves'? What are the reasons for reduction in farms maintaining woodlots? What are the advantages of agroforestry systems? What are the forces driving agroforestry? What are the advantages of intercropping in the initial years of orchard establishment? What is an ecological trap? What are the advantages of windbreaks? What is the relationship between the height of the windbreaks and wind speed reduction? What characteristics of a windbreak system influence reduction in wind speed?
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This note was uploaded on 02/17/2012 for the course NUTR 241 taught by Professor Kathleenmerrigan during the Fall '06 term at TUFS.

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