Abstract
Increased corn (Zea mays L.) grain yield with strip intercropping, made possible because of increased edge effects, makes this soil-conserving crop production system appealing to farmers. The objective of this study was to determine the population and row configuration needed to optimize the additional yield potential in each outside corn row. Treatments 'included: 74, 99, and 124 thousand plants ha-1 were grown in twin rows and 74 thousand plants ha-1 grown in single rows. Single rows or twin row centers were spaced 0.76 m. The experiment was conducted at four central Iowa sites during 1996 and 1997. Grain yield was not increased by increasing population, nor did it respond consistently to the twin row configuration. There was little interaction between row position in the strip and treatment response. Higher plant population decreased the number of ears per plant, kernels per row, and kernel weight. The twin row configuration increased the number of ears per plant, but this was offset by a decrease in the number of kernels per row and kernel weight. Farmers should follow current cropping recommendations until this optimum is determined. Given the inconsistent grain yield response to twin rows, there is no current rationale for investing in twin row planting equipment.
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Claims 8
Claim · model-written summary
Increasing population did not increase corn grain yield.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- increasing populatione0
- Outcome
- Grain yielde0
- Direction
- not increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was not increased by increasing population”
t0“Corn”
Claim · model-written summary
Corn grain yield responded inconsistently to twin rows.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- twin row configuratione0
- Outcome
- Grain yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yield was not increased by increasing population, nor did it respond consistently to the twin row configuration”
t0“Corn”
Claim · model-written summary
Row position showed little interaction with treatment response.
- Taxon
- CornZea mays subsp. mayst0
- Organ / stage
- row position in the stripe0
- Outcome
- treatment responsee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was little interaction between row position in the strip and treatment response”
t0“Corn”
Claim · model-written summary
Higher population decreased ears per plant, kernels per row, and kernel weight.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- Higher plant populatione0
- Outcome
- number of ears per plant, kernels per row, and kernel weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher plant population decreased the number of ears per plant, kernels per row, and kernel weight”
t0“Corn”
Claim · model-written summary
Twin rows increased ears per plant.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- twin row configuratione0
- Outcome
- number of ears per plante0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The twin row configuration increased the number of ears per plant”
t0“Corn”
Claim · model-written summary
Twin rows decreased kernels per row and kernel weight.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- twin row configuratione0
- Outcome
- number of kernels per row and kernel weighte0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The twin row configuration increased the number of ears per plant, but this was offset by a decrease in the number of kernels per row and kernel weight”
t0“Corn”
Claim · model-written summary
The authors recommended following current cropping recommendations.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- follow current cropping recommendationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Farmers should follow current cropping recommendations until this optimum is determined”
t0“Corn”
Claim · model-written summary
The authors found no present rationale for investment in twin row planting equipment.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- no current rationale for investing in twin row planting equipmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is no current rationale for investing in twin row planting equipment”
t0“Corn”
The same questions in other papers
density · yield · Zea mays (maize)Positive and negative results
138 papers in the same direction as this paper · 519 in the opposite direction
- positive
- no effect
- positive
654 papers more in this group
See all 658 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.