Spring Ploughing Research Articles

Correction - Distribution of peach roots under pasture and cultivation

At the Scoresby Horticultural Research Station four peach trees, growing in a fine sandy clay loam developed on a Silurian mudstone, with pasture on one side of the tree row and cultivation on the other, were excavated in 1962 with water under high pressure hosing. In 1966 four similar trees were excavated in the same way. From 1962 to 1966 additional nitrogen was applied to all trees and complete autumn and spring ploughing replaced a modified cultivation system of autumn and spring discing. No differences were found between treatments or between times of excavation for total root weight or for three grades of root, fibre (<l mm), medium (1-9 mm), and framework (>9 mm). However, the root distribution patterns differed markedly and changed with time. Fibre root distribution improved over time for pasture and declined for cultivation, and by 1966 was more widespread under pasture than under cultivation. Part of these changes could be attributed to waterlogging damage in 1964. The pattern of root distribution helped to explain the tolerance of the pasture trees to wet conditions and was consistent with tree growth.

Observations on a crane fly,Tipula dorsimacula Walker, that damages potato tubers in Idaho

Damage to potato tubers in Idaho by the larvae of the crane fly,Tipula dorsimacula Walker, consists of round punctures varying in depth from shallow pits to one inch. The winter is spent in the larval stage. Adults emerge and deposit eggs during May or early June. There is a single generation annually. Observed damage has occurred in fields planted to potatoes following spring plowing of alfalfa. Early season development of the larvae is presumably on the alfalfa refuse. Then the larvae transfer to and feed on potato tubers commencing about mid-August when the organic refuse in the soil becomes low. In a few instances damage to small fields or parts of fields, has been sufficiently extensive to reduce the grade of potatoes or make them unsalable.

Project Moon Harvest

Farmers, children, and strollers through the countryside of western Iowa are being urged by the National Aeronautics and Space Administration to turn in any strange‐looking rocks they may find to their local county agent or Soil Conservation Office. The organized search for moon fragments that may have fallen to earth after having been knocked off the lunar surface by meteors is centered in western Iowa, according to NASA, because the area is “remarkably free of native stones since underlying rocks are covered by a thick, ancient blanket of fine windblown material”. Accordingly, the Iowans of Pottawattamie, Monona, Shelby, Harrison, and Crawford Counties are being requested (largely through the medium of a touring NASA “Spacemobile”) to look for such fragments—especially during spring plowing, when any stone turned up in that region is a curiosity.

Poems: “In a Teapot, Then” by Harriet Mask and “Spring Plowing--English IV” by Sister Mary John Therese, B. V. M.

Poems: “In a Teapot, Then” by Harriet Mask and “Spring Plowing--English IV” by Sister Mary John Therese, B. V. M.

Fall vs. Spring Plowing and Soil Physical Conditions in a Rotation Experiment1

Agronomy JournalVolume 45, Issue 6 p. 257-261 Article Fall vs. Spring Plowing and Soil Physical Conditions in a Rotation Experiment1 M. F. De Boodt, M. F. De BoodtSearch for more papers by this authorA. J. Englehorn, A. J. EnglehornSearch for more papers by this authorD. Kirkham, D. Kirkham Graduate Student, Assistant Professor, and Professor. The senior author, who has been on leave of absence as staff member from the State Agricultural University, Ghent, Belgium, gratefully acknowledges financial support from the Belgium Institute I.r.s.i.a.; also, from the U. S. Government through a Fulbright grant.Search for more papers by this author M. F. De Boodt, M. F. De BoodtSearch for more papers by this authorA. J. Englehorn, A. J. EnglehornSearch for more papers by this authorD. Kirkham, D. Kirkham Graduate Student, Assistant Professor, and Professor. The senior author, who has been on leave of absence as staff member from the State Agricultural University, Ghent, Belgium, gratefully acknowledges financial support from the Belgium Institute I.r.s.i.a.; also, from the U. S. Government through a Fulbright grant.Search for more papers by this author First published: 01 June 1953 https://doi.org/10.2134/agronj1953.00021962004500060008xCitations: 2 1 Journal Paper No. J-2188 of the Iowa Agricultural Experiment Station, Ames, Iowa, Project 739. 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 Citing Literature Volume45, Issue6June 1953Pages 257-261 RelatedInformation

A Survey of the Corn Borer Situation in 1925

This paper consists of an account of the present status of the investigation of the European corn borer ( Pyrausta nubilalis ), with special reference to dispersion, quarantine and inspection, scouting, and control measures. While the spread in New England and Eastern New York during 1925 was small, the infested area in the states bordering on Lake Erie, viz., Western New York, Pennsylvania, Ohio and Michigan was increased to 30,237 square miles. The states of Massachusetts, Pennsylvania, Ohio and Michigan have adopted compulsory clean-up regulations and much good has resulted from their enforcement. Progress has been made in the development of machinery for cutting corn close to the ground in order to prevent the establishment of strong colonies of the borer. Experiments with spring and fall plowing to determine the effect as a control measure are being conducted. During the season of 1925 a total of 2,427,020 automobiles were inspected at intrastate quarantine lines and 171,502 ears of corn confiscated. 1972 corn borers were taken from the confiscated corn, much of which was destined for points several hundred miles outside the infested area. Scouting was prosecuted during 1925 on a larger scale than in previous years.