Portable Wind Tunnel Research Articles

Effect of 39 Years of Cropping Practices on Wind Erodibility and Related Properties of an Irrigated Chestnut Soil

AbstractIn April 1951, a portable wind tunnel was set up at the Scotts Bluff Substation on plots that were planted to sugar beets and potatoes. The soil losses from wind under controlled conditions were measured on manured and non‐manured plots from (i) a 3‐year rotation of barley, potatoes and sugar beets and (ii) a 6‐year rotation of barley with alfalfa, alfalfa 3‐years, potatoes and sugar beets. On these and other plots, size‐fractions of air‐dried clods from the surface 2‐inches of soil were separated by means of rotary sieves. Each size‐fraction was analyzed for the apparent density of clods, total nitrogen content, and moisture content at 15‐atmosphere tension.The cropping and manurial practices showed a marked effect on the soil losses from wind. Alfalfa in the rotation was superior to manure application in reducing soil losses. Application of 12 tons of barnyard manure on potato plots in a 3‐year rotation reduced the soil loss from 74,500 pounds per acre to 2,720. The soil loss on non‐manured plots in the 6‐year rotation was 970 pounds per acre. The beet plots, in a cropping system and manurial application similar to potato plots showed a smaller regimen of soil losses.Mechanical stability of clods was determined by their resistance to break‐down as a result of resieving. It was greatest in plots cropped to continuous barley, followed in order by beets, corn, and potatoes. Mechanical stability was greater in manured plots than in non‐manured.The application of manure or growing of alfalfa in the rotation effected a marked reduction in the apparent density of clods and increased the total nitrogen content and the moisture content at 15‐atmosphere tension. Alfalfa was superior to manure in effecting these changes in soil properties.

The Effects of Plant Residue Cover and Clod Structure on Soil Losses by Wind

AbstractTests were conducted in the field to determine the interrelationships of surface drag, surface roughness, plant residue cover, percent of soil material less than 0.42 mm in diameter, and soil loss obtained by means of a portable wind tunnel. The tests were conducted at Garden City, Colby, and Manhattan, Kans. on plots prepared especially to obtain a range in residue cover over a range in soil structure.The data obtained were analyzed according to standard multiple regression and correlation procedure and presented in terms of regression equations. The exponential regression equations provided a satisfactory expression of the functional relationships. Factors effecting variation in results between the different locations were cited.The regression equations illustrate the effect of each factor on soil loss. On the basis of relationships secured at three locations, an exponential equation approximating the results of the tests as a whole was developed. In this equation, soil loss, X, in pounds per acre is shown to vary directly as the 2.5 power of the surface drag of the wind and the 3.5 power of the percent of soil fractions less than 0.42 mm in diameter. It varied inversely as the 0.8 power of the weight of surface residue. A simplified clod structure‐residue index of soil loss, wherein the surface drag of the wind is held constant at 3,000 pounds per acre, is presented.

A Portable Wind Tunnel and Dust Collector Developed to Evaluate the Erodibility of Field Surfaces1

Agronomy JournalVolume 43, Issue 4 p. 189-191 Article A Portable Wind Tunnel and Dust Collector Developed to Evaluate the Erodibility of Field Surfaces1 A. W. Zingg, A. W. Zingg Project Supervisor, Research Division of the Soil Conservasion Service, U. S. D. A. Grateful acknowledgment is made to F. C. Fenton, Head, Department of Agricultural Engineering, Kansas State College, for helpful suggestions and criticisms made during the course of the work; also to E. A. Engdahl, Agricultural Engineer, Soil Conservation Service, who assisted the author in the early stages of planning and constructing the wind tunnel.Search for more papers by this author A. W. Zingg, A. W. Zingg Project Supervisor, Research Division of the Soil Conservasion Service, U. S. D. A. Grateful acknowledgment is made to F. C. Fenton, Head, Department of Agricultural Engineering, Kansas State College, for helpful suggestions and criticisms made during the course of the work; also to E. A. Engdahl, Agricultural Engineer, Soil Conservation Service, who assisted the author in the early stages of planning and constructing the wind tunnel.Search for more papers by this author First published: 01 April 1951 https://doi.org/10.2134/agronj1951.00021962004300040006xCitations: 15 1 Contribution No. 424 from the Department of Agronomy, Kansas State College, Manhattan, Kans., and the Soil Conservation Service, U. S. D. A. Cooperative research in the mechanics of wind erosion. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume43, Issue4April 1951Pages 189-191 RelatedInformation

Calibration of a Portable Wind Tunnel for the Simple Determination of Roughness and Drag on Field Surfaces1

Agronomy JournalVolume 43, Issue 4 p. 191-193 Article Calibration of a Portable Wind Tunnel for the Simple Determination of Roughness and Drag on Field Surfaces1 A. W. Zingg, A. W. ZinggSearch for more papers by this authorN. P. Woodruff, N. P. Woodruff Project Supervisor and Junior Agricultural Engineer, respectively, Research Division of the Soil Conservation Service, U. S. D. A.Search for more papers by this author A. W. Zingg, A. W. ZinggSearch for more papers by this authorN. P. Woodruff, N. P. Woodruff Project Supervisor and Junior Agricultural Engineer, respectively, Research Division of the Soil Conservation Service, U. S. D. A.Search for more papers by this author First published: 01 April 1951 https://doi.org/10.2134/agronj1951.00021962004300040007xCitations: 17 1 Contribution No. 425 from the Department of Agronomy, Kansas Agricultural Experiment Station, Manhattan, Kans., and the Soil Conservation Service, U. S. D. A. Cooperative investigations in the mechanics of wind erosion. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article.Citing Literature Volume43, Issue4April 1951Pages 191-193 RelatedInformation

Evaluation of the Erodibility of Field Surfaces with a Portable Wind Tunnel

Soil Science Society of America JournalVolume 15, Issue C p. 11-17 Section I—Soil Physic Evaluation of the Erodibility of Field Surfaces with a Portable Wind Tunnel† A. W. Zingg, A. W. Zingg Project Supervisor, Research Division of the Soil Conservation Service, U. S. D. A. Grateful acknowledgment is made to C. J. Whitfield of the Amarillo Experiment Station for the cooperation, assistance, and use of facilities which made these tests possible. Clod structure determinations were made by W. C. Johnson, and residue counts by C. E. Van Doren of the Amarillo staff. C. L. Englehorn, Soil Scientist, and N. P. Woodruff, Agricultural Engineer, of the Manhattan project staff assisted the author in running the wind tunnel tests and assembling the data necessary to this report.Search for more papers by this author A. W. Zingg, A. W. Zingg Project Supervisor, Research Division of the Soil Conservation Service, U. S. D. A. Grateful acknowledgment is made to C. J. Whitfield of the Amarillo Experiment Station for the cooperation, assistance, and use of facilities which made these tests possible. Clod structure determinations were made by W. C. Johnson, and residue counts by C. E. Van Doren of the Amarillo staff. C. L. Englehorn, Soil Scientist, and N. P. Woodruff, Agricultural Engineer, of the Manhattan project staff assisted the author in running the wind tunnel tests and assembling the data necessary to this report.Search for more papers by this author First published: 01 January 1951 https://doi.org/10.2136/sssaj1951.036159950015000C0003xCitations: 9 ‡ Contribution No. 431, Department of Agronomy, Kansas Agricultural Experiment Station, Manhattan, Kans., and the Soil Conservation Service, U. S. Dept. of Agriculture. Cooperative investigations in the mechanics of wind erosion. AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume15, IssueC1951Pages 11-17 RelatedInformation