Abstract:
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In 1977, a ten year series of continuous cropping trials was commenced to compare the effect of four farm tillage systems. This bulletin reports the grain yield results for the first six years of these trials. Three of the tillage systems involved direct-drilling, with an initial weed control by the bipyridyl herbicide, Spray.Seed* followed by: seeding with a triple-disc drill; or seeding with a combine-drill with scarifying points; or one shallow cultivation with a scarifier followed by seeding with a tr
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