What are the three drops of monsoon paddy field agriculture?

The three lows of monsoon paddy field agriculture refer to the low level of mechanization, low level of science and technology and low commodity rate. According to relevant data, the characteristics of rice cultivation in Asia are: one big and one small, one high and three low, and three low means low mechanization level, low scientific and technological level and low commodity rate. The characteristics of Asian monsoon paddy field agriculture are: three lows, one high, one big and one small (low level of mechanization, low level of science and technology, low commodity rate, high yield per unit area, large water conservancy projects and small-scale peasant management).