How to collect data (Data Gathering)
study, the researchers used questionnaires. To contact the seller of pesticides and chemicals farmers to buy from stores in Roi Et. Data collection was conducted in 2 phases:
1. Primary (Primary data) by collecting data from a population sample is for pesticides. Farmers and customers of chemicals
2. Secondary (Secondary data) by collecting information, documents, books, academic theories and related research. Including data from researching on the Internet.
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