A major physical factor restricting the cultivation of perennial crops in the Sudan savannah of Nigeria is the?

A major physical factor restricting the cultivation of perennial crops in the Sudan savannah of Nigeria is the seasonal pattern of rainfall. The Sudan savannah region of Nigeria experiences a distinct wet and dry season. During the wet season, there is plenty of rainfall, which can be favorable for crop growth. However, during the dry season, there is little to no rainfall, making it difficult for perennial crops to survive. Perennial crops, such as trees, have deep root systems that require a constant supply of water. In the Sudan savannah, the soil also tends to be sandy, which can exacerbate the problem of water retention. As a result, it is difficult to cultivate perennial crops in this region without irrigation or other water management strategies. While factors such as seasonal regime of streams and pest menace can also affect crop cultivation, the seasonal pattern of rainfall is the major physical factor that restricts the cultivation of perennial crops in the Sudan savannah of Nigeria.