. Biology of deserts : the proceedings of a symposium on the biology of hot and cold deserts organized by the Institute of Biology. Deserts. Figure 4. Kochia sedifolia pasture, with myall trees {Acacia sowdenii); grass and other annuals complete with the bluebush which is not growing vigorously. cement of the experiment. Myall trees (Acacia sowdenii) and a number of shrubs of minor importance are associated with the bluebush. During drought years the ground between the bushes is devoid of plants, but in seasons of favourable rainfall, herbage and grass provide a sparse to moderate cover. The s
. Biology of deserts : the proceedings of a symposium on the biology of hot and cold deserts organized by the Institute of Biology. Deserts. Figure 4. Kochia sedifolia pasture, with myall trees {Acacia sowdenii); grass and other annuals complete with the bluebush which is not growing vigorously. cement of the experiment. Myall trees (Acacia sowdenii) and a number of shrubs of minor importance are associated with the bluebush. During drought years the ground between the bushes is devoid of plants, but in seasons of favourable rainfall, herbage and grass provide a sparse to moderate cover. The soil is of an arid calcareous type, with a brown loamy sand surface ; the texture increases gradually to a sandy clay at about 3 feet. The effects of treatments have been measured primarily by weight esti- mates (Woodroffe, 1941) of the amount of edible green forage present in the spring of each year; trends in the numbers and production of bluebush have been used as the main indicators of the results of grazing. Live weights and wool production of the sheep have been recorded. For the purpose of the present paper, discussion will be confined to five treat- ments, viz :- 1. Control with no grazing. 2. Continuous light grazing at the rate of 24 sheep per square mile. 3. Continuous moderate grazing at the rate of 48 sheep per square mile. 134. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cloudsley-Thompson, J. L. London : Institute of Biology ; New York : Hafner
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectdeserts
