Below cotton is harvested, in the middle it is delivered to a Cooperative (合作社), above is a peasant with cotton and a worker with cloth. The small text says "Sell cotton, store cotton, support industrial production; city and countryside exchange to consolidate the alliance between workers and peasants" (售棉,储棉,支援工业生产;城乡交流,巩固工农联盟).
Our copy of the poster was once in the collection of the National Library in Nanjing, the stamp bottom left indicates.