The Aztecs developed irrigation systems, formed terraced hillsides, fertilized their soil, and developed chinampas or artificial islands.
ðɪ ˈæztɛks dɪvˈɛləpt ˌɪɹɪɡˈeɪʃən sˈɪstəmz, fˈɔːɹmd tˈɛɹɪst hˈɪlsaɪdz, fˈɜːɾɪlˌaɪzd ðɛɹ sˈɔɪl, ænd dɪvˈɛləpt tʃˈaɪnæmpəz ɔːɹ ˌɑːɹɾɪfˈɪʃəl ˈaɪləndz.