Ka whakamahi mātou i ngā pū whenua rorohiko 7000 me ētahi atu pū whenua matua. I ia whakamahinga o tō mātou tuhinga uara mai i te karo pū whenua ki te whakawheki, ki te whakapā, ki te whakatika ā-piripono, ka tirohia te uara. Anō hoki, ka whakapai ngā whakatikatika piripono pū whenua pū whenua me te whakangungu i runga i ngā heke koroti me te whakangungu. I muri i ngā tau 17 i te mahi me ētahi tohu whaihua i waenganui, ka tukuna e mātou ngā wāhi whakawheki pū whenua o te rorohiko me te tūranga rorohiko, kei reira ngā tūtohitanga haumaru me te wehi hoki.