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Pages 27-29

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From page 27...
... 26 Other Investigations Several investigations other than those needed to solve specific problems are desirable. A survey of diurnal gas exchange in plants would probably be beneficial.
From page 28...
... 27 SOIL-ROOT RELATIONS Summary of Program Moisture stress imposes limitations on crop production throughout the Western Hemisphere . Since movement of moisture through soils in unsaturated flow is generally too slow to meet the requirements of rapidly transpiring plants, the development of deep and active root systems is one important means of alleviating moisture stress.
From page 29...
... 28 Nutrient requirements H

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