Smith akaona nyika sechinhu chakabatana chose uye akakurudzira masisitimu akasanganiswa emiti nezvirimwa pasi. Iri bhuku rakafuridzira vanhu vazhinji kuti vaite chinangwa chekurima zvine hunyanzvi, senge Toyohiko Kagawa uyo akapayona kurima kwemasango muJapan muma1930. Mubhuku raAustralia P. A. Yeomans ra1964, anotsigira dudziro yekurima kwekusingaperi, sekunge inogona kutsigirwa nekusingaperi. Yeomans akaunza nzira yekucherechedza-yakavakirwa pakushandisa ivhu muAustralia muma1940s uye neKeyline Dhizaini senzira yekugadzirisa uye kugovera mvura.
kutarisira kugovera uye kugovera mvura