The Problem. . . 1 The Experiments . . 3 Preparation ofPlants 4 Planting 5 Measurement of Plants 14 Experimental Error 14 Measurement ofPhysical Factors . . .16 Forest Service CONTENTS Page Comparison of the Climatic Characteristics ofthe Three PlantTypes ... 27 Correlation Between Growth and Environmental Factors 41 Summary 69 Conclusions 71 WASHINGTON GOVERNMENT PRINTING OFFICE 291 V3 Ajrric, -Forestry. Main Library UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 700 Contribution from the Forest Service HENRY S. ...
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The Problem. . . 1 The Experiments . . 3 Preparation ofPlants 4 Planting 5 Measurement of Plants 14 Experimental Error 14 Measurement ofPhysical Factors . . .16 Forest Service CONTENTS Page Comparison of the Climatic Characteristics ofthe Three PlantTypes ... 27 Correlation Between Growth and Environmental Factors 41 Summary 69 Conclusions 71 WASHINGTON GOVERNMENT PRINTING OFFICE 291 V3 Ajrric, -Forestry. Main Library UNITED STATES DEPARTMENT OF AGRICULTURE BULLETIN No. 700 Contribution from the Forest Service HENRY S. GRAVES, Forester Washington, D. C. PROFESSIONAL PAPER October 14, 1918 CLIMATE AND PLANT GROWTH IN CERTAIN VEGETATIVE ASSOCIATIONS. By ARTHUR W. SAMPSON, Plant Ecologist, Forest Service. 1 CONTENTS. i The problem The experiments Page. Page. 1 Comparison of the climatic characteristics of 3 the three plant types 27 Preparation of plants 4 Correlation between growth and environ- Planting 5 mentalfactors . 41 Measurement of plants 14 Summary of the data obtained 69 Experimental error 14 Conclusions... 71 Measurement of physical factors 16 THE PROBLEM. The relation of climate to the growth and development of vegetation is of profound importance in both practical and experimental agriculture. It is extremely useful to know the cause of successful growth and establishment, or of partial success or failure, of various species in different plant associations and under widely contrasted climatic conditions. The climatic requirements of various plant types are largely responsible for the results obtained in the case of experimental seedings and plantings of most species. Once the adverse climatic factors are definitely known, failures with plants may be largely avoided by thejudicious selection of sites or of species especially adapted to withstand the limiting factors. Therefore, a series of experiments was undertaken, a to obtain a comparison of the climatic requirements of the main plant types, and b to determine, quantitatively, the relation between various environmental factors on the one hand and plant growth and certain other physiological func- tions on the other. The results obtained appear to be conclusive in most instances and should prove of value both in experimental and in practical agriculture and forestry. 1 The author is indebted to F. Merrill Hildebrandt for material assistance in procuring and assembling the data presented in this paper. V Rlatceroi cdrnmbn knowledge that the life cycle and structural characteristics of plants are largely determined by the climatic conditions prevailing in the habitat, but the quantitative relations existing between the potent climatic factors and the vegetative activi- ties are not well known. Though the ecologist and plant geographer have well-defined have shown that a given plant association may geographical limits, 1 which in turn are characterized by rather dis- tinct complexes cf environmental climatic conditions, they have not as yet definitely determined which climatic factor, or set of fac- tors, is most influential in affecting distribution, growth, and physiological activities generally. 2 This is attributable to several conditions. In the first place, the relation of plant development to environment is exceedingly complicated and can be determined quanti- tatively only when the most influential physical factors are recognized, recorded, and properly interpreted...
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Add this copy of Climate and Plant Growth in Certain Vegetative to cart. $53.62, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2019 by Wentworth Press.
