Collect all four, for example, the household is households taken from the formula is as follows: 8604-4 = 8600 households, and brought into the formula determining population size of Taro Yamane (Yamane, 1973), so this will be a sample from the 383, in combination with the organic cultivation of 4 people will get a + 4 = 387 wujiaochang examples. When comparing the proportion in each district will be the size of the sample table 1, which is the amount of green leaf vegetables in Nakhon Pathom province, and then find out the proportion of vegetables the way normal, non-toxic and organic are the following. The number of farmers who cultivated common. 374 people, farmers grow a toxic amount of 9 people and farmers who grow the organic farming of 4 people.
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