Which is the best description of the effect that tractors and other motorized implements have had on georgia agriculture in the years following world war ii? georgia's crop yields decreased because of increased pollution. pine trees replaced cotton as georgia's most profitable agricultural product. the efficiency of georgia's farming improved and a single farmer could work a larger plot of land. tractors and motorized implements had no effect of agriculture in georgia in the years following world war ii.

Agriculture went through a major transformation after WWII. New tractors, other motorized farming equipment, fertilizers, and establishing crop rotation farming made farming easier and more productive.

Since these new farming ideas and technologies improved farming and made it more efficient, a farmer could farm bigger tracts of land by himself.

This also had a cultural impact on Georgia. After WWII, more people moved to cities to look for jobs, since small farmers lost their jobs. They moved to urban areas to look for factory/business jobs.

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.