Hiki ke hoʻohālikelike ʻia nā mīkini hoʻoikaika kūpono e ʻike i ka palau ʻana, rotary tillage, weeding a me nā hana ʻoihana ʻē aʻe.
He mea koʻikoʻi nā ʻōnaehana kaʻa hope hydraulic i nā papahana ʻoihana kuaʻāina e like me nā ala kaʻa holo kiʻekiʻe, nā tunnels, DAMS a me nā hale kuaʻāina, hiki ke ʻeli koke i nā tausani a i ʻole miliona mau lua e pono ai.