Claim · model-written summary
Corn yield in the 2-yr organic corn–soybean rotation (Org2) was 41% lower than in CT.
Zea mays subsp. maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Average corn grain yield during 9 yr was similar in NT and CT (7.88 and 8.03 Mg ha −1 , respectively) but yields in Org2, Org3, and Org4+ were, respectively, 41, 31, and 24% less than in CT”
Title
Long‐Term Agronomic Performance of Organic and Conventional Field Crops in the Mid‐Atlantic Region
Michel A. Cavigelli; John R. Teasdale; Anne E. Conklin Agronomy Journal 2008. doi:10.2134/agronj2006.0373
Other claims from this paper (14)
- Intervention effect Corn grain yield over 9 years was similar under conventional no-till and chisel-till (about 7.9 and 8.0 Mg/ha).
- Intervention effect Corn yield in the 3-yr organic rotation (Org3) was 31% lower than in CT.
- Intervention effect Corn yield in the 4- to 6-yr organic rotation (Org4+) was 24% lower than in CT.
- Association Low N availability explained about 73% of corn yield losses in organic systems relative to CT.
- Association Weed competition explained about 23% of corn yield losses in organic systems.
- Association Plant population explained about 4% of corn yield losses in organic systems.
- Association Corn yield had a positive relationship with crop rotation length among organic systems.
- Mechanism The rotation effect on corn yield was related to increasing N availability and decreasing weed abundance (author interpretation).
- Intervention effect Soybean yield was 19% lower in the three organic systems than in conventional systems.
- Association Weed competition alone accounted for the soybean yield difference between organic and conventional systems.
- Association Wheat yield showed no consistent differences among cropping systems.
- Association Crop rotation length and complexity had little impact on soybean yield among organic systems.
- Association Crop rotation length and complexity had little impact on wheat yield among organic systems.
- Recommendation Adequate N supply for corn and weed control in corn and soybean are the main challenges to equivalent organic and conventional yields (author recommendation).