The way these things work, when you are engaged in agriculture, it's natural to go first to that soil, to that patch of land which is known to be likely to produce the best land, the most fertile, the best product, the most fertile land there is.

这一方式是这样运作的,当你从事农业,你自然而然的会首先关注土壤因素,去找出已知土地中最为肥沃的那一块,土地越肥沃,产量越高,就越追求更为肥沃的土地

耶鲁公开课 - 古希腊历史简介课程节选

The NSW national parks and wildlife service plans to revive what it calls two natural bio-regions: the property's red soil mulga lands, and grey soil Darling riverine plains.

ECONOMIST: A land of drought

They will use a bacterial agent that occurs naturally in soil and is authorised for the operation by Natural England, the government's advisor on the natural environment.

BBC: Toxic caterpillars to be targeted by helicopter