A Conservation Handbook. Samuel H. Ordway, Jr Pp. 60. The Conservation Foundation, New York. 1949.
This handbook summarizes the various aspects of conservation as "the planned management and wise use of nature's resources as a whole as well as severally." The author briefly describes nonrenewable and renewable natural resources. Stress is given to the important concept that all renewable and natural resources are interdependent and that conservation of one can only be achieved by measures designed to conserve them all while realizing at the same time that man is part of the pattern which must be conserved. Approaches to conservation practice by means of surveys, plans, use of technicians, conservation districts and regional planning, are dealt with in a short chapter. Land-, forest-, range water, and wildlife-management are each discussed in a separate brief chapter. Under land management, the types of erosion and methods of checking together with methods of preserving and restoring soil fertility are described.
"Forest management seeks to increase forest growth and harvest to achieve optimum continuous wood production or watershed development or growth of forage and habitat for animals.., or maximum opportunity for human study and recreation or the most practical combination of these uses of a forest area." On range management, the necessity to avoid overgrazing with its attendant evils is stressed and the measures required to build up range carrying capacity are described.
"Water management seeks to make available the maximum possible amount of water at times and places where it is needed... and that its destructive force be checked so that it will not destroy other resources and human life and property." Water conservation and: flood control and the necessity for avoiding pollution of streams is also discussed.
The author states that wildlife management aims to ensure an abundance of animal life without encroaching upon agricultural economy by protecting their habitat and food supply, and by protecting them against predators, including man. Research into breeding habits and feeding requirements is an essential phase of this work.
Técnica Defectuosa Como Causa de Pérdidas en Las Plantaciones de Pino Insigne. (Losses in the Monterey Pine Plantations Caused by Defective Technique.) Eduardo Torricelli D. and Dagoberto Muñoz V. Pp. 15. Departamento de Bosques, Dirección General de Tierras y Colonización, Santiago de Chile. 1950.
The extensive plantations undertaken in Chile for a number of years with Monterey pine (Pinus radiata), locally known as "Pino insigne," have shown a wide variation in results especially in the percentage of survival of young trees. The Forestry Department undertook an investigation of the causes of losses, in order to make specific recommendations and their results are reported in this bulletin
The factors influencing plantations are analyzed as follows: (1) time of the year for planting; (2) handling of plants; (3) methods of planting; (4) preparation of the field;. (5) selection of plants. A good deal of technical experimentation and field research was involved in this study and the results are clearly set forth. The bulletin should prove valuable in improving the planting techniques of the country.
Publications Received
An International Index of Films on the Conservation and Utilization of Resources. Prepared for the United Nations Scientific Conference on the Conservation and Utilization of Resources (UNSCCUR) August-September 1949. Pp. 175, illus. United Nations, Lake Success, N. Y. 1950.
Proceedings of the United Nations Scientific Conference on the Conservation and Utilization of Resources, 17 August-6 September 1949, Lake Success, New York. Vol. 1, Plenary Meetings. Pp. lxi + 431. United Nations, Department of Economic Affairs, Lake Success, N. Y. 1950.
Insect Enemies of Eastern Forests. F. C. Craighead, United States Department of Agriculture. Pp. 679, illus. (Misc. publ. No. 657). U. S. Government Printing Office, Washington, D. C. 1950. $2.50.
Wildlife Management (Upland Game and General Principles). Reuben Edwin Trippense e.; Pp. 479, illus. McGraw-Hill Book Company, Inc., New York and London. 1948. $5.
Planning A National Forest Inventory
The first in a new series of Forestry and Forest Products Studies. Prepared by FAO after extensive investigation, this study is intended to be of service to those who may be required to plan large-scale forest inventories. The hook, of approximately 100 pages, will be available shortly from FAO sales agents; price US$ 1.00.
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