Respuesta :
i think it is building and managing of irrigation systemsÂ
Answer:
building and managing of irrigation systems
Explanation:
John Wesley Powell observed that in the lands of the American west in the spring the land used to flood. However, this water could not sustain agriculture for the rest of the year.
The act was introduced by Francis G. Newlands so that building of irrigation systems could be done. This reclamation was the reason why human population grew in the west.
