WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Friday, September 21, 2018

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4713. Murray, G.A. and J.B. Swenson. 1984. Intercropping Austrian winter peas and winter cereals for seed.. ID Agr. Expt. Sta. CIS #749.
Peas seeded at 25, 50 and 75% of mixture with winter wheat or barley; both crops harvested on same day; 25% cereal, 75% pea was best mix; less lodging, less disease, 27% yield increase; cereal yields very low; apperently no N advantage to cereal from the pea; less lodging with winter wheat compared to winter barley; better maturity match with barley; LER over 130 with WW(25%) + WP(75%). T: yield, seed size.

8512. Izaurralde, R.C., N.C. Juma, and W.B. McGill. 1990. Plant and nitrogen yield of barley-field pea intercrop in cryoboreal-subhumid central Alberta.. Agronomy J. 82:295-301.
There was an advantage to intercropping barley and field peas for nitrogen efficiency, but not for plant yield. Barley-pea intercrops, each species seeded at half its sole rate, appear to increase N production in grain and straw over sole cropping under these climate and soil conditions.

10756. Laird, E.. 1988. Grain legume mixtures and intercropping.. Proc. Crop diversification in sustainable agriculture systems, Univ. Sask., Saskatoon, p. 20-25.
The experience of several Saskatchewan farmers with intercropping is discussed. Some examples are durum wheat and flax, spring wheat and fall rye, rye and oats, rye and flax, peas and oats, mustard and peas, clover and oats. With wheat and rye, seeded together in the spring, the wheat is harvested the first year and the rye the next year. The rye discourages broadleaf weeds.

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