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8617. Liebman, M. and R.H. Robichaux. 1990. Competition by barley and pea against mustard: effects on resource acquisition, photosynthesis and yield.. Agric., Ecosys., and Environ. 31:155-172.
A barley monocrop and a barley/pea intercrop suppressed growth and seed yield of two weedy species of mustard. The negative effects of N and light deficits on the mustard's photosynthetic performance were quantified. The negative effects could be partly overcome by application of N fertilizer or use of a pea cultivar that intercepted less light.