Download Against the Grain: How Agriculture Has Hijacked Civilization by Richard Manning PDF

By Richard Manning

During this provocative, wide-ranging publication, Richard Manning deals a dramatically revisionist view of modern human evolution, starting with the immense bring up in mind measurement that set us except our primate kin and taken an accompanying elevate in our desire for nourishment. For 290,000 years, we controlled to fulfill that want as hunter-gatherers, a kingdom during which Manning believes we have been at our such a lot human: at our smartest, most powerful, such a lot sensually alive. yet our reliance on nutrition made a safe provide deeply beautiful, and finally we embarked upon the rural test that has been the background of our prior 10,000 years.

The evolutionary highway is affected by failed experiments, in spite of the fact that, and Manning means that agriculture as we now have practiced it runs opposed to either our grain and nature's. Drawing at the paintings of anthropologists, biologists, archaeologists, and philosophers, with his personal travels, he argues that not just our ecological ills-overpopulation, erosion, pollution-but our social and emotional malaise are rooted within the devil's discount we made in our not-so-distant prior. And he bargains own, a possibility methods we'd re-contour the trail now we have taken to resurrect what's such a lot sustainable and maintaining in our personal nature and the planet's.

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Extra info for Against the Grain: How Agriculture Has Hijacked Civilization

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Distans showed stability at all salinity treatments (Tab. 3). Leptochloa fusca had significantly greater shoot fresh and dry matter than the other grass species at 16 and 24 dS/m. Percent fresh and dry matters of L. fusca and P. distans remained unaffected at all salt treatments (Tab. 3). In contrast, percent biomass production in P. divisum was severely reduced by salinity (Fig. 1). The results for the biomass production clearly shows that L. fusca and P. distans were highly tolerant to varying salinity levels of the growth medium compared with the other three species.

Despite the depressive effect of salinity, halophytes are able to germinate at salt concentrations similar to that of sea water or even higher: in this way, seeds of Triglochin maritima germinated even at 400 mM NaCl [7], while Kochia scoparia germinated with a rate of 30 % at 1,000 mM NaCl [8]. The germination aptitude of Spartina alterniflora was preserved even at 1,027 mM, even with a very low rate of 8 % [9]. In addition, it was reported that the seeds of Kochia americana are able to germinate even at 1,712 mM NaCl [8].

Fusca increased, whereas it decreased at the highest drought treatment. In contrast, relative water content of P. divisum remained unaffected at both drought treatments (Tab. 2). Increasing drought cycles had no significant effect on chlorophyll a, b, and total chlorophyll content. Species differed significantly for chlorophyll a and b, but this difference was attributed to large differences in their controls. Total soluble proteins of L. fusca increased at 8 drought cycles, whereas that of P. divisum decreased at 4 drought cycles.

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