Michina yemazuva ano yekurima inokanganisa kuorera kwevhu uye inokonzera njodzi dzinongoitika dzoga. Mhedziso iyi yakasvikwa neboka remasayendisiti kubva kuSweden, Switzerland neUnited States, rakabudiswa basa rake mumagazini Proceedings of the National Academy of Sciences (PNAS).
Chidzidzo ichi chinoti kana mukupera kwema1950, batanidza vakohwi nezviyo zvinorema matani mana, saka zvemazuva ano zvinogona kurema matani makumi matatu nematanhatu. Michina yemazuva ano yekurima yakagadzirirwa kuchengetedza ivhu risina kusimba: matayi anogadzirwa akapfava uye akafara, izvo zvinoderedza pasi pasi.
Asi izvi zvinongoponesa denga repamusoro pevhu. Asi muzvikamu zvakadzika, ivhu rakasungirirwa zvokuti kubereka kwaro kunotyisidzirwa. Kunyanya kusungirirana kunokanganisawo kugona kupfuudza mvura.
"Ichi chinogona kunge chiri chimwe chezvikonzero zvekuderera kwezvirimwa uye kuwedzera kwehuwandu hwemafashamu munyika," akadaro munyori wezvidzidzo, Professor Thomas Keller kubva kuSweden University of Agricultural Sciences.
Keller nevamwe vaaishanda navo vakaronga nyika dziri panjodzi zvakanyanya ye "chronic compaction" yevhu. Nzvimbo dzakanyanya kunetsa dzaive Australia, Europe, North neSouth America. Masayendisiti anofungidzira kuti chikamu chimwe muzvishanu chevhu rinorimwa pasi rose chakakuvadzwa kwazvo zvokuti pane mukana muduku wokuchidzorera. Kusvika padiki, compaction inokanganisa ivhu muAsia neAfrica, uko mwero wekurima mechanisa hauna kukwirira zvakanyanya.