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Effects of previous legume and oat crops on grain yield and take-all in spring barley

Published online by Cambridge University Press:  27 March 2009

G. V. Dyke
Affiliation:
Rothamated Experimental Station, Harpenden, Herts. AL5 2JQ
D. B. Slope
Affiliation:
Rothamated Experimental Station, Harpenden, Herts. AL5 2JQ

Summary

Two experiments compared yields of spring barley following barley, oats, beans (Vicia faba), red clover (cut) and (one experiment only) oil-seed rape, and tested effects of trefoil (Medicago lupulina) undersown in the preliminary crops of barley and oats. N fertilizer was applied at two rates to preliminary crops, and four rates to the final crop in each experiment. Barley following barley suffered severely from take-all disease (Gaeumannomyces graminis var. tritici); barley after other crops was little affected. Other recognized soil-borne diseases were unimportant. Barley yielded less after barley than after other crops except where excessive N fertilizer caused lodging. Clover and beans left N residues equivalent to about 88 and 44 kg fertilizer N/ha respectively; undersown trefoil left inconsistent N residues. Couchgrass (Agropyron repens) was more prevalent after barley than after other crops.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1978

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References

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