1, mmiri mmiri na-agba mmiri nke 30 ~ 50%
Site na ịka nká, a na-abawanye ala, a na-abawanye ala, mmiri na-ebelata ala, a na-ebelata ogo ọrụ ugbo.
2, ọnụego fatịlaịza na-abawanye site na 20%
Mgbe ala dị larịị, ejidere fatịlaịza na mgbọrọgwụ nke ihe ọkụkụ ahụ, melite ịmịpụta fatịlaịza ma belata mmetọ gburugburu ebe obibi.
3, mkpụrụ ihe ọkụkụ na-abawanye site na 20 ~ 30%
Ọdịda ala dị elu na-abawanye mkpụrụ site na 20 ~ 30% ma e jiri ya tụnyere teknụzụ scraption, na 50% ma e jiri ya tụnyere ala na-enweghị akwụkwọ.
4, ala na-eme ka arụmọrụ dị mma karịa 30%
Usoro na-akpaghị aka na-achịkwa ego nke ala na-akpaghị aka n'oge ịka ụlọ, na-ebelata ala na-ere ọkụ na obere obere.
Nyochaa ebe ngwọta anyị nwere ike iwe gị.