Imishini yesimanje yezolimo inomphumela omubi ekuvundeni kwenhlabathi futhi ibangela izinhlekelele zemvelo. Lesi siphetho safinyelelwa yiqembu lososayensi abavela eSweden, Switzerland nase-United States, eshicilelwe umsebenzi wakhe ephephabhukwini Proceedings of the National Academy of Sciences (PNAS).
Ucwaningo luphawula ukuthi uma ngasekupheleni kwawo-1950, hlanganisa abavuni nokusanhlamvu okunesisindo esingamathani angu-4, khona-ke ezanamuhla zingaba nesisindo samathani angu-36. Imishini yesimanje yezolimo iklanyelwe ukuvikela inhlabathi entekenteke: amathayi enziwa athambe futhi abanzi, okunciphisa ukucindezela komhlaba.
Kodwa lokhu kusindisa kuphela ungqimba olungaphezulu lwenhlabathi. Kodwa ezingqimbeni ezijulile, inhlabathi iminyene kangangokuthi ukuvunda kwayo kusengozini. Ukucinana okudlulele nakho kuthinta ikhono lokudlula amanzi.
“Lokhu kungase kube ngesinye sezizathu zokwehla kwezilimo nokwanda kwezikhukhula emhlabeni,” kusho umbhali wocwaningo uSolwazi Thomas Keller waseSweden University of Agricultural Sciences.
U-Keller kanye nozakwabo benza imephu yezindawo ezisengcupheni kakhulu "yokucinana okungapheli" kwenhlabathi. Izindawo ezaziyinkinga kakhulu kwakuyi-Australia, iYurophu, iNyakatho neNingizimu Melika. Ososayensi balinganisela ukuthi ingxenye eyodwa kwezinhlanu zomhlaba olimekayo iwonakele kangangokuthi mancane amathuba okuba ibuyiselwe. Kancane kancane, ukubumbana kuthinta inhlabathi yase-Asia nase-Afrika, lapho izinga lemishini yezolimo lingekho phezulu kangako.