1. Climatic conditions: The climate in northern Brazil is hot and humid, with alternating rainy and dry seasons, which is not conducive to the growth and development of soybeans. At the same time, it is hot and rainy all the year round in this area, which is easy to cause pests and diseases and increases the risk of planting soybeans.

2. Soil quality: The soil quality in northern Brazil is relatively poor, and the soil layer is shallow, which is vulnerable to soil erosion and erosion, which is also unfavorable to the growth and development of soybeans.

3. Transportation: The transportation in northern Brazil is inconvenient, the road conditions are poor and the transportation cost is high, which affects the sales and transportation of soybeans.