According to the grassroots, there are several blocking points in the compulsory scrapping of variant tractors.

1, inadequate publicity: some farmers don't understand the provisions of compulsory scrapping of variant tractors, and their understanding and acceptance of the policy is not high. This leads to mutual suspicion and resistance to scrapping work, and they are unwilling to take the initiative to scrap.

2. Lack of effective measures: In practice, there is a lack of effective measures to guide and encourage farmers to voluntarily scrap variant tractors. For example, the lack of corresponding incentive mechanism or subsidy policy can not provide enough economic incentives for farmers to actively participate in scrapping work.

3. It is difficult to supervise: because of the large number and wide distribution of variant tractors, it is difficult to supervise. Some farmers use variant tractors for transportation and other activities while knowing that they can't use them, which increases the supervision pressure of law enforcement departments.

4. Technical problems: In some areas, it is difficult to detect and identify variant tractors due to the limitation of technical means. As a result, some variant tractors were not found and scrapped in time, which affected the promotion of scrapping work.

5. Economic factors: In some economically underdeveloped areas, farmers are highly dependent on variant tractors, and compulsory scrapping will have a certain impact on each other's livelihood. This makes farmers take a wait-and-see attitude towards scrapping work and are unwilling to take the initiative to participate.