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- Why Pakistani youth (especially agri. graduates) hesitate to accept agriculture as a profession? explain briefly.What is aspect of your life that come from dependence on agriculture and its culture effects? Where did the ingredients of your favorite foods originate from?What do you mean by silviculture?
- Energy Efficiency of Biofuel Production Most of the plant material currently used for biofuel production consists of food cropsmainly corn, soybeans, and sugarcane. In 2006, David Tilman and his colleagues published the results of a 10-year study comparing the net energy output of various biofuels. The researchers grew a mixture of native perennial grasses without irrigation, fertilizer, pesticides, or herbicides, in sandy soil that was so depleted by intensive agriculture that it had been abandoned. They measured the usable energy in biofuels made from the grasses, and also from com and soy, then measured the energy it look to grow and produce biofuel from each kind of crop (Figure 6.1). FIGURE 6.1 Energy input and output of biofuels made from three different crops. One hectare is about 2.5 acres. About how much energy did ethanol produced from one hectare of corn yield? How much energy did it take to grow the corn to make that ethanol?How do you think a farmer can best help to conservesoil? How do you think a scientist can best help to conservesoil? How do you think a national government canbest help to conserve soil?what are the nutritional requirement of cowpeas/blackeye peas crops
- Explain why you support or oppose greatly increasing the use of (a) genetically modified food production and (b) organic perennial polyculture.Why are GMO seeds and food so controversial? How do agritech companies consistently manage to promote their own interests over those of farmers, animals and consumers?The above figure indicates CO2 flux in a farmland system over one growing season. The researchers monitored CO, flux for corn (NEE-maize), soil near the corn (SR- maize), and soil in a barren field (SR-barefield). Based on this figure, which of the following statements is TRUE? O None of these statements is true O The corn (NEE-maize) is a carbon sink for part (probably the peak) of the growing season The corn (NEE-maize) is the biggest carbon source Both soils (SR-maize and SR-barefield) are carbon sinks over the entire growing season