In dictionary form, 치앙마이에서는 농사를 많이 짓다. 치앙마이 = Chiang Mai (a major city in North-Western part of Thailand) 많이 = a lot, many 농사[農事]를 짓다 = to do farming 지어 = 반말의 "짓다" (informal speech of "짓다") For irregular 'ㅅ' verbs, 'ㅅ' requires to be dropped out whenever it is followed by a vowel formation, e.g., -아/어/여 ; -(으)ㄹ ; -(으)세요 ; etc. === 좋은 하루를 지내세요.／I wish you a good day.／Ich wünsche Dir einen schönen Tag.

Not co.ing from 지다. It is the irregular form from 짓다