In the recent millennium, it cannot be denied the existing multicultural societies in this world. It is supported by the evidence that the societies have diverse cultural backgrounds. It can also be seen in Indonesian societies. They are truly multicultural societies with multiple ethnics, social status, economic and educational background. One of the multicultural groups in Indonesia is a farmer. Most of them live in small village or remote areas in Indonesia. Their productivity can be developed by providing interdependence psychology and multicultural education for them. The farmer's economic performances in East Java were still apprehensive or concerned. Therefore, an experiment was designed in order to improve their economic performances. Many problems affected their economic performance. One of them was interdependence task problem-they cannot work in team. The teamwork in the interdependence group was in the forms of pool, sequential, reciprocal and team. Based on theoretical review and the previous findings, it could be hypothesized that the independence task could improve their group performance. The sampling technique applied in this study was multistage random sampling. The questionnaires were administrated and distributed through the first harvest during the season. All of items after trying out were valid. The real experiment was conducted in the second and the third harvest. The subjects were 180 farmers in Sidoarjo. It showed that the team task independence performance was the best followed by reciprocal, sequential and pool.