The Siantar Simalungun Farmers Association (PPSS) is a people's organization in the Siantar Martoba District, Pematangsiantar City, which was established in 2000. The purpose of this organization is to strengthen the struggle of farmers in realizing their sovereign rights over land and its use as a source of life. This organization has 80 Heads of Families or 315 members. Until now, Pematangsiantar farmers have controlled and cultivated the Priority Agrarian Reform Location (LPRA) in Block 37 Tanjung Pinggir, Pematang Siantar covering an area of ​​25 hectares (0,25 hectares per Head of Family) on former plantation land. From this land, farmers plant rice and have succeeded in producing an average of 5-6 tons per hectare.

Unfortunately, the small area of ​​land per family results in the harvest not being sufficient to meet food needs as well as the source of farmers' economy. On the other hand, in agricultural processing, farmers also still have difficulty implementing the concept of organic farming and the lack of regeneration for young farmers to participate in fighting for the rights to their cultivated land, the low interest of the younger generation here is also more or less triggered by the daily reality that is commonly faced, namely that farming does not provide economic benefits. 

 To overcome this, with the support of the Nusantara Fund Direct Funding, they developed collective farming based on nature-harmonious techniques integrated with goat farming in the Tanjung Pinggir rice fields. The goal is to build the independence and welfare of Tanjung Pinggir farmers. In the long term, this program is also an effort to make the rice fields a location for rice field tourism and a center for agricultural education in Pematang Siantar City.

One of the main activities is the development of agriculture with rice and vegetable commodities managed collectively by PPSS members. By providing training on organic farming techniques, it is hoped that farmers can gain new skills in managing their land, both in terms of agriculture and product marketing. They also have goat farming which is also managed collectively. Goat manure is used as raw material for organic fertilizer to increase soil fertility.

As a result, members of the Pematangsiantar farmer union have successfully gained knowledge through training to produce rice and vegetables organically. Farmers have also succeeded in producing organic pesticides from goat urine as a substitute for chemical pesticides and organic fertilizer from collectively managed goat manure which is used directly as a pesticide in the rice fields of union members. In addition, PPSS has also begun working on new development opportunities, namely agricultural education and rice field-based ecotourism which in the future will be open to the surrounding community and tourists.