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Level Of Nutrition Depends: The average adult male needs between 2,300 and 2,700 calories and 37-62 grammes (1.3-2.2 ounces) of protein each day to stay in good health. In addition, he needs ade¬quate quantities of the appropriate micronu-trients such as minerals and vitamins. Whether or not the world population receives this level of nutrition depends not only on the quantity of food produced but also on how that food is distribited.
Almost all elements can now be determined by variations of this gen¬eral method. Methods employing radioactive trac¬ers other than the activation analysis technique have likewise proved of great importance in an¬alytical chemistry.
Applications in Agriculture.—The improve¬ment of plant nutrition often depends upon increas¬ing the efficiency of fertilizer uptake. The con¬dition of the soil and the mechanical placement of the fertilizer are among the factors which in¬fluence the rate of utilization. Radioactive phos¬phorus in phosphate fertilizers has been used as a rapid and accurate means for assessing the rate of fertilizer incorporation in growing plants. Radioactive tracers have also proved effective in other aspects of agriculture, such as in animal nutrition and milk production.See Also Agriculture And Nutrition:Dr. Harrar, an agricultural scientist, is a trustee and president of the Rockefeller Foundation. He is a con¬sultant on agriculture and nutrition to the U.S. gov¬ernment and to several other countries. A Fellow of the American Association for the Advancement of Science, Dr. Harrar is also a member of many other honorary societies and has received numerous awards for his work in agriculture.
Other areas of nutrition in which research was being conducted included the use of spe¬cial diets to treat various metabolic diseases, vitamin D function, protein requirements, eval¬uation of nutritional deficiency, and vitamin E and aging. Some of the other topics being stud¬ied were nutrition education procedures, alcohol and nutrition, dental caries, dietary effects re¬lated to cellular function, and the relationship of nutrition to infectious diseases and the de¬velopment of immunity.
In 1967-68 a new understanding of the rela¬tionship between energy and environment was reached. The crucial issue was no longer whether there was sufficient fuel and power for the future but how man would manage the lib¬eration and use of energy. The energy engineer who had been concentrating on specific fuels and individual energy converters was now deal¬ing with large energy systems. Where he had once concentrated on the scientific aspects of a power problem, he now served as a bridge between scientific knowledge and socioeco-nomic needs.
On The Other Hand See Animal Nutrition Has Become:The computer has become a necessary tool of the larger breeding organizations which sell stock or semen to commercial farms.
The greater the emphasis on economic performance, the more the stock farmer has to rely on specialist advice and the results of scientific research. Animal nutrition has become a large study in itself, as has the design of housing and equipment.
(4) Management of livestock. Profits and efficiency of land use are influenced by animal husbandry. The range manager should know the effect of nutrition on reproduction, gain, and wool yield, and he must carefully study the cost and return from supplemental feeding. The prob¬lems of livestock buying and marketing are com¬plex and affect ranch income directly. Animal breeding influences quality and yield of meat, and the manager must know good livestock quality and how to emphasize it through an understanding of genetics. Diseases must be known and avoided or cured. The proper protection and care of live¬stock are especially important during calving or lambing and in the cold winter months. |
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