Date of Award

1973

Degree Type

Report

Degree Name

Master of Science (MS)

Department

Ecology

First Advisor

John C Malechek

Abstract

The area north of latitude 14° north in the Sudan is characterized by unreliable precipitation patterns and a high incidence of a drouth period following the first rain of the "rainy season." In this region it is not uncommon to have a completely dry year without a single rain shower. The damage occurring to the plant cover when a drouth period follows the first rain is great. This is especially the case for the annual plant species in that such precipitation distribution patterns tend to exhaust the seed supply in the soil and do not supply adequate moisture for seed germination. This factor has largely been responsible for development of sparse vegetal cover consisting mainly of shrubs with an occasional understory of early maturing annuals that are evident in years with a good rainy season.

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