Hei whakatau i te waikawa o te oneone o roto i to rohe, tirohia nga tipu ka tipu ana koe. Ka mutu, ko nga momo waikawa he rite ki tetahi kapi otaota. Hei tauira, ko te oneone waikawa, kei roto i te nui o te makuku, ka pai mo te whakatipu i te whakatipu putiputi, akaaka, horsetail, kopurepure, potentilla. Ko te oneone maroke me te paku waikawa he pai ake mo te whakatipu Leucanthemum, alfalfa, coltsfoot, clover me te burdock. Ko nga papanga, he oneone kohinga-kore ka waiho hei putake mo nga tipu penei i te pua nani, tataramoa, waewae kuihi, euphorbia, chamomile me te kaima. Ko te whaihua o te whenua ka taea te whakatau na te aroaro o nga otaota, nga rakau rakau, quinoa, me te tataramoa.
WhakaaroMena ka whakatau tika koe i te waikawa, ka tūtohutia te pepa litmus. Tangohia etahi ruarua ruarua o te whenua, whakakiia ki te ua me te wai taawahi ranei ka whakaohokia kia huri noa te whenua ki te pareparenga wai. Taria ma rima nga meneti ka uru ano. E rima meneti i muri mai, he puka i runga ake o te whakarewa, ka tono ai i te pepa litmus. Mena he whero te wahi, ka teitei te kaikawa o te oneone, kei te taumata kei runga ake i te pH 5.0. Mena i riro i te whakamatautau litmus he tohu tohu karaka, na te waikawa kei te toharite kei te taumata o te pH 5.1-pH 5.5. Ko te whakamatautau litmus kowhai e whakaatu ana i te waikawa paku, ko te kaikawa kei roto i te pH 5.6 ki te pH 6.0. Ko tetahi pepa matomato ka tohu i te oneone koretake. Ko te taera matomato o te whakamarama litmus e tohu ana ko te oneone he hanganga waiariki me te waikawa o te pH 7.1- pH8.5.
Mena e hiahia ana koe ki te whakatipu huawhenua, me whakato koe i te oneone kore, ka tino pai ake.
Te Reta Papae Rawa Rawa (Indikatorpapier)
