Monthly Catalog of United States Government Publications
Monthly Catalog of United States Government Publications

Author: United States. Superintendent of Documents

Publisher:

Published: 1968

Total Pages:

ISBN-13:

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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index

Natural Environments
Natural Environments

Author: John V. Krutilla

Publisher: Routledge

Published: 2013-10-18

Total Pages: 280

ISBN-13: 1135988617

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This study represents the first scholarly attempt to consider the difficult allocation problems associated with management of natural resources and proposed changes in the natural environment. Originally published in 1973

Distribution of Organic Matter Reserve in a Desert Shrub Community
Distribution of Organic Matter Reserve in a Desert Shrub Community

Author: Ralph C. Holmgren

Publisher:

Published: 1972

Total Pages: 530

ISBN-13:

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In a community of widely spaced perennials, mostly shrubs, in the cold desert of western Utah, total accumulated organic mass (excluding the small amount of humus) is about 1,770g./m.2. Of this total, 240 g. are above the ground and 1,530 g. below. Of the latter, 295 g. is underground litter. About half of the 1,235 g. of roots are in the surface 30 cm. of the soil, about 0.3 of them in the second 30 cm., 0.15 in the third, 0.03 in the fourth, and 0.01 of them occur below 120 cm. to about 135 cm. Coarce roots (> 2 mm. in diameter) are found only in the immediate vicinity of plants and are unimportant below the 15-cm. depth. Fine (