Investigations in Soil Management: Part I. Amount of Plant Food Readily Recoverable from Field Soils with Distilled Water. Part II. Relation of Crop Yields to the Amounts of Water-Soluble Plant-Food Materials Recovered from Soils. Part III. Relation
Investigations in Soil Management: Part I. Amount of Plant Food Readily Recoverable from Field Soils with Distilled Water. Part II. Relation of Crop Yields to the Amounts of Water-Soluble Plant-Food Materials Recovered from Soils. Part III. Relation
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...FIVE DEGREES OF FERTILIZATION. In connection with the investigations relating to differences among 8 soil types in the 4 States of North Carolina, Maryland, Pennsylvania, and Wisconsin, one of the series of studies made had for its object the comparison of the seasonal changes in water content of the 8 soil ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ...FIVE DEGREES OF FERTILIZATION. In connection with the investigations relating to differences among 8 soil types in the 4 States of North Carolina, Maryland, Pennsylvania, and Wisconsin, one of the series of studies made had for its object the comparison of the seasonal changes in water content of the 8 soil types and under the 5 fertilizations to which they were subjected, the object being primarily to ascertain whether differences in the ield would be in any quantitative way related to differences in the water content of the soils upon which the crops were grown. It was arranged that soil samples should be taken at the same time in the 4 localities and once per week in the surface foot, once in two weeks in the second foot, and three times during the growing season in the third and fourth feet, these times being (1) at the beginning of the experimental work, (2) near the middle of the growing season, and (3) near the time when the crops upon the ground had approached maturity. The moisture content was determined by drying the entire sample, consisting of a composite of 4 cores extending through the foot sampled, one core each from each of the duplicate subplots representing the type of fertilization and crop. The amounts of water present in the several soils at the different times of sampling are expressed in two ways, as percentages of the dry soil, and in absolute measure or inches of depth which the total water in the given foot would represent were it spread out as a continuous sheet over the surface of the field sampled. The results obtained are expressed in the following tables under the respective soil types, fertilizations, and different depths of sampling. In computing the absolute amounts of moisture in these cases, a specific gravity...
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