ANFS102 Lecture Notes - Lecture 5: Sub-Saharan Africa, Monogastric, Soil Fertility
6 Apr 2016
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Document Summary
Even early on during crop domesicaion and breeding. Livestock producion is dynamic: contributes to 40% of global value of agricultural output, 15% of total food energy, 25% of dietary protein, increasing around the world (with the excepion of most sub-saharan africa, parts of. Shiting from pasture based ruminants to feed-dependent monogastric [poultry] -> increasing globalizaion. Characterized by relaively low: - geneic diversity species diversity. Agroecosystems difer from natural ecosystems in ive major ways: species diversity may be low. Farmers plant crops in an orderly fashion- which may make pest control more diicult. Grain producion increased from 631 to 1780 million metric tons from 1950 to 1990. Top 5 countries in order of producing the most amount of grain are: china, us. 1890-35-40 labor hours required to produce 100 bushels of corn(2 acres) 1930-15-20 labor hours required to produce 100 bushels of corn. Growth of industrializaion: from the 18 th to the 20 th century.
