early special conditions of soil and rainfall were reasonable.

[darkpumochka]

Помогите пожалуйста перевести предложение вот контекст:
No one knows just why the woods ended where they did, or why the tall
grass of the prairies—the wide rolling and almost treeless plains—began at that
point. The reason still remains shrouded in mystery, for the eastern part of the
prairies' tall grasslands have soil that will support tree life. One explanation has it
i that the Indians burned off the forest in order to force game animals out to the
hunters. Another reason given is that perhaps some early special conditions of soil
and rainfall were responsible.

[10-4]

Другое объяснение состоит в том, что это [могло быть]обусловлено некоторыми существовавшими в прежние эпохи особыми свойствами почв и дождевого увлажнения.

[darkpumochka]

спасибо большое))