* Constraints
-Lacks of national strategies of development in agricultural mechanisation;
-Weakness of the domestic manufacturing industry of agricultural machinery;
-Small scale rice production and low income farmers;
-Small size rice fields with soft soil crossed by many rivers and canals;
-Lack of researchers for R&D, testing and selection of farm machinery; and technicians for training of machinery users;
-Small scale production of farm machinery with no standards causing problems for users;
-Weak services after sales;
-Low efficient using of machinery by non-professional servicing people;
-Little government supports for servicing groups and manufacturers;
-Lack of international supports for agricultural mechanisation;
-Climate change.