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Low-Energy Grubbing for Control of Junipers

H. T. Wiedemann and B. T. Cross
Journal of Range Management
Vol. 34, No. 3 (May, 1981), pp. 235-237
DOI: 10.2307/3898050
Stable URL: http://www.jstor.org/stable/3898050
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Low-Energy Grubbing for Control of Junipers
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Abstract

Low-energy grubbing was effective and economical in controlling sparse to moderate stands of junipers infesting rangeland. A small, 48.5-kW (65-hp), shift-on-the-go crawler tractor, as compared to tractors larger than 74.5kW (100-hp) normally used, was adapted for grubbing by attaching a U-shape blade to the front mounted C-frame for root cutting at depths of 15 to 30 cm. A 98% plant kill was achieved because uprooting of trees below the bud-zone prevented sprouting. The newly designed hydraulic attachment significantly improved tree uprooting. Grubbing rate was a curvilinear function of juniper density and varied approximately from 4.0 to 0.5 ha/hr (10 to 1.25 ac/hr) to remove 80 to 500 trees/ha (30 to 200 trees/acre). Cost varied from $6.00 to $50.00/ha ($2.40 to $20.00/acre).

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