The theory of correlation as applied to farm-survey data on fattening baby beef /

Tolley, H. R.

doi:10.5962/bhl.title.108211

Cited by 8 publications

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“…Biometry should have a place in the study of crop-survey data wherever large numbers of records are involved, in order that the coefficient of correlation may serve as a check on the conclusions otherwise drawn and that it may furnish, thru its frequency table, a description of the prevailing practice in the region in question. Tolley (1917) states that the coefficient of net correlation affords a good means of determining the net effect of each of several factors bearing on a result, or of eliminating the effect of other factors when it is desired to find the true relationship between any two. Applying biometrical methods to farm-survey data on fattening baby beef, Tolley has shown how the 'gross apparent correlation between any two or more factors may be substituted in a derived formula and the net correlation of any two factors thereby deduced.…”

Section: The Accuracy Of Survey Methods Depends Very Largely On Such mentioning

confidence: 99%

“…Valuable studies of the influence of weather on the yield of potatoes in Ohio for a period of fifty-five years have been made by Smith (1915), and a similar study for a period of twenty-six years has been made in New York by Fox (1916). The relationship of both growing-season rainfall and temperature, in both States, is expressed in terms of the coefficient of correlation (r).…”

Section: Growth Variation Between New and One-year-old Maine Seed Stomentioning

confidence: 99%

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A study, by the crop survey method of factors influencing the yield of potatoes / Earle V. Hardenburg.

Hardenburg¹

1922

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Almost from the date of their establishment, practically all state and federal experiment stations in this country, as well as many foreign stations, have tested, by diverse methods, the relative influences of factors affecting the yield of potatoes. A review of the abundant literature of DESCRIPTION OF REGIONS SURVEYED For a better understanding of the environmental conditions under which the potato crop was produced, a brief description of climate, soil, topography, elevation, length of growing season, market facilities, type of farming, land values, and status of potato production, is given for each of the four regions surveyed. Unfortunately, of the regions concerned, only Monroe and Clinton Counties have been soil-surveyed by the United States Department of Agriculture. More detailed knowledge as to these environmental influences may be obtained from figures 126 to 129. FlG. 126. ELEVATIONS OF THE REGIONS SURVEYED

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Section: The Accuracy Of Survey Methods Depends Very Largely On Such mentioning

confidence: 99%

Section: Growth Variation Between New and One-year-old Maine Seed Stomentioning

confidence: 99%

A study, by the crop survey method of factors influencing the yield of potatoes / Earle V. Hardenburg.

Hardenburg¹

1922

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“…Tolley (1917) published simple and partial correlations computed from crosssection data on farm inputs and outputs. Experimental scientists usually content themselves with short causal chains.…”

Section: Identification Problems 1913-34mentioning

confidence: 99%

Agricultural Economists as World Leaders in Applied Econometrics, 1917–33

Fox

1986

American J Agri Economics

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“…Whipple (1915) studied the influence of thinning to one stalk per hill, in a two-years test of nine varieties planted from two-ounce pieces irrespective of the number of eyes. Thinning to one sprout improved the market shape and the uniformity of the crop, but Whipple's results do not justify any conclusion that either total or marketable yield was increased by thinning.…”

Section: Large As Compared With Small Seed Piecesmentioning

confidence: 99%

A study, by the crop survey method, of factors influencing the yield of potatoes ...

Hardenburg¹,

Hardenburg²

1922

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at a minimum of 5 acres, tho a very few records were taken on farms having a production area of only 4 acres. The reason for the establishment of this minimum limit lies in the assumption that growers of acreages smaller than 5 are probably not growing potatoes in a manner comparable to the average of the region. The data on cost of production, tho obtained at the same time and indicated on the survey blank, are not a part of this study. The subject of cost has been studied by Fox (1919), formerly of the Department of Farm Management at Cornell Universit3D ESCRIPTION OF REGIONS SURVEYED For a better understanding of the environmental conditions under which the potato crop was produced, a brief description of climate, soil, topography, elevation, length of growing season, market facilities, type of farming, land values, and status of potato production, is given for each of the four regions surveyed. Unfortunately, of the regions concerned, only Monroe and Clinton Counties have been soil-surveyed by the United States Department of Agriculture. More detailed knowledge as to these environmental influences may be obtained from figures 126 to 129. Fig. 126. elevations of the regions surveyed A Study of Factors Influencing the Yield of Potatoes 1149 LONG ISLAND Most of the potato crop in Suffolk County is grown east of Riverhead on both the north and the south shores of Long Island. The Long Island Railroad furnishes the transportation facilities for practically all of the surplus crop of this region.

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The theory of correlation as applied to farm-survey data on fattening baby beef /

Cited by 8 publications

References 0 publications

A study, by the crop survey method of factors influencing the yield of potatoes / Earle V. Hardenburg.

A study, by the crop survey method of factors influencing the yield of potatoes / Earle V. Hardenburg.

Agricultural Economists as World Leaders in Applied Econometrics, 1917–33

A study, by the crop survey method, of factors influencing the yield of potatoes ...

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