Natural Vegetation as an Indicator of the Capabilities of Land for Crop Production in the Great Plains Area (Classic Reprint)

Bücher

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Excerpt from Natural Vegetation as an Indicator of the Capabilities of Land for Crop Production in the Great Plains AreaThe great difficulty of correlating vegetation with any single factor is shown by the vast difference Of Opinion among botanists as to which factors are Of the greatest importance in controlling plant distribution.Correlations with the physical or the chemical nature Of the soil have Often been successfully applied for a limited area, but without exception these correlations have failed to apply when extended to wider areas. The results Of numerous attempts seem to prove that a strict correlation Of vegetation with the physical or chemical nature Of the soil is possible only when all other conditions Of the habitat are comparatively uniform. When the climatic conditions and the physical condition (texture, water content, etc.) Of the soil are uniform we should be able to correlate variation in the vegeta tion with differences in the chemical nature Of the soil, on the other hand, when the climatic conditions and the chemical composition Of the soil are uniform, the differences Observed in the vegetation are probably due to inequalities in the physical nature Of the soil. Varia tions, either physical or chemical, are Of greatest importance when they approach the limit Of favorable conditions. A correlation between vegetation and either the chemical or physical nature Of the soil can be expected to apply only over a limited area where the other conditions are practically uniform. As soon as we move from one region to another the correlation between vegetation and soil type is at oncevbroken down. In the Great Plains region this is very clearly brought out by the following examples: In eastern Colorado short-grass Vegetation is correlated with a loam soil, wire-grass with sandy loam soil, and bunch-grass with sand soil. Here, under conditions of practically uniform rainfall, evaporation, etc., we have a close correlation between the vegeta tion and the soil types.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.