THE CHANGING TUSSOCK GRASSLANDS

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Abstract
A century ago the tussock grasslands covkred over 50 per cent. of the South Island. Today over 30 per cent of this island is referred to as tussock grasslands. On the hills, downs, and plains, land where the plough could go, the natural grasslands have been changed into areas growing crops and introduced pastures. Beyond the reach of the plough in the mountainous region where, the soils are poor and the climate severe the tussock grassltinds continue the struggle to perpetuate-their kind: As part of the great grassland formation which. has been estimated to cover about l/5 of the land surface of the globe, the tussock grasslands form a tiny but quite unique seg-, ment. On the mountain ranges eastwards of the Main Divide of the Southern Alps there has developed a type of grassland with several characteristics peculiar unto itself.

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