The environmental consequences of the Ujamaa project were highly reactive to yearly rainfall in Tanzania. With high yearly rainfall, fertile soil yields increases dramatically in Tanzania. Furthermore, rainfall is very important in regards to the agricultural purposes of the land. During the Ujamaa project, Shao writes "Land with only twenty inches or less.. is generally not suitable for agriculture and is used mostly for grazing". However, land that received thirty to forty inches of rainfall a year were used to grow staple crops as well as commercial products such as cotton. During the Ujamaa Villagization program, population was dispersed throughout the country; however, the densities of cities and developed villages was particularly unbalanced. Nonetheless during the Ujamaa project, Tanzanian land was ready to be cultivated and it depended on the legal institutions to organize settlements on these lands.