In addition, it has also carried out a testing model of new fragrant rice variety N91, and fragrant sticky rice varieties NV1 and NV3, on a scale of 3,000 sq.m in Chieng Cang and Huoi Mot communes, together with a land improvement model for longan trees in Lien Phuong hamlet, Chieng Khoong commune, and an organic fertiliser testing model on 1.8 hectares of rice of Song Lam Tay Bac Fertiliser Joint Stock Company in Chieng Cang hamlet, Chieng Cang commune./.