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Characteristics of Soil Pockets Resulting from the AerWay Rolling Tines

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Applied Engineering in Agriculture. 29(3): 301-307. (doi: @2013
Authors:   Song Ai, Ying Chen, Neil B. McLaughlin, Junfa Wang
Keywords:   AerWay Aerator Rolling tine Forage Soil Pocket Penetration depth Swing angle Liquid manure application.

Soil aerators have recently been adapted for land application of liquid manure. Characteristics of the soil pockets formed by the aerator affect the manure infiltration, placement, and potential manure application rate. A two-year field study was carried out to evaluate factors affecting pocket characteristics in two forage fields in Manitoba, Canada; one field had a clay loam soil, and the other had a loamy sand soil. An AerWay aerator with two types of rolling tines (shatter and leaf tines) was used in the field study. Each type of rolling tine was operated at two different swing angles (0° and 5°) and two penetration depths (125 and 150 mm). The characteristics of the resultant soil pockets including pocket opening dimensions and pocket volume were measured. Pocket opening varied between 91 and 212 mm in length, 9 and 44 mm in width, and 1,088 and 5,555 mm2 in area. The volume of pocket also varied with the soil type, tine type, penetration depth, and swing angle, and ranged between 69 and 327 mL. Larger pocket openings and volumes were observed in the clay loam soil than in the loamy sand soil. The shatter tines created larger soil pocket volumes than the leaf tines. The larger swing angle and greater penetration depth resulted in larger soil pockets.

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