Journal article

MICROWAVE SOIL HEATING FOR CONTROLLING RYEGRASS SEED GERMINATION

G Brodie, G Harris, L Pasma, A Travers, D Leyson, C Lancaster, J Woodworth

American Society of Agricultural Engineers Transactions | AMER SOC AGRICULTURAL & BIOLOGICAL ENGINEERS | Published : 2009

Abstract

Several studies have evaluated the effectiveness of microwave soil heating to control a range of weed species. Ryegrass species are problematic weeds of cropping systems across many of the major crop production regions of Australia. This study determined the effect of irradiation time, soil moisture, and distance into the soil from the irradiated surface on the efficacy of microwave soil heating in reducing the germination of both perennial (Lolium perenne) and annual (Lolium rigidum) ryegrass seeds. The study used a horn antenna to apply the microwave energy to the soil. Temperature increased linearly with heating time in dry sand, although the rate of temperature increase depended on dista..

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University of Melbourne Researchers