34. featured terrain features, and covers an area of, most of which is "Khorat basin." A. thung Kula wept B. River Plains war. C. Chi Mun River Plains and branches. D. a type of switch that mountain35. geologic structures of the North East's "stone village, Korat", which most of the elements is what type of stones. A. sandstone B. limestone C. rock salt. D. schist 36. the Northeast plains with the cultivation area has reached 70 per cent in the region, but the quality of the soil is not as good as expected. This is because why? A. clay sediments found over many years of use for a long time. B. geological structure of the region is the sandstone. C. washing occurred in front of the soil by the action of rain. D. the quantity of rain is a little stiff and dry soil moisture deficits.37. What is not a factor that makes the summer of the northeast was dry. A. the rainy season there is short term. B. ground, mainly sandy soil Water easily. C. destruction of water sources, shallow D. forest destruction cause lack of drainage water.
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