Abstract
Corn ( Zea mays L.) seeding depth recommendations typically range from 3.8 to 5.1 cm, but few studies have been conducted in recent years. We conducted field‐scale studies on four farms at four equally spaced seeding depths (2.5–6.4 cm) in New York in 2013 and 2014 to validate seeding depth recommendations across different soil conditions. Seeding depth affected corn populations and yield in 6 of 8 site‐years but optimum seeding depth differed across sites and years within sites. Yield responses to seeding depth were small on well‐drained silt loams with reduced tillage (∼3% advantage at 3.8 vs. 2.5 and 5.1 cm in 2013 and no difference in 2014), and on somewhat poorly drained silty clay loams under no‐till (∼5.5% difference with maximum yields predicted at ∼4.2 cm in both years). Yield responses to seeding depth were larger on a somewhat poorly drained silt loam with moldboard plowing (9–15% advantage for 6.4 vs. 5.1 and 3.8 cm, respectively; maximum yields predicted at >5.78 cm in both years). On somewhat poorly drained silt loams with reduced tillage, populations had a positive quadratic response (maximum populations predicted at 5.45 cm) and yield had a positive linear response in 2013, but plant populations had a negative linear response and yield had no response in 2014. Weather conditions after planting affected yield responses inconsistently, but the data indicate that seeding depths should probably range from 3.8 to 5.1 cm on silty clay loams and from 3.8 to 6.4 cm on silt loams.
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Claims 11
Claim · model-written summary
Seeding depth affected corn population and yield in six of eight site-years, while optimum depth varied.
- Taxon
- corn
Zea mays subsp. mayse0 - Outcome
- corn populations and yielde0
- Value
- 6 of 8 site‐yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeding depth affected corn populations and yield in 6 of 8 site‐years but optimum seeding depth differed across sites and years within sites”
Claim · model-written summary
On well-drained silt loams with reduced tillage, yield had about 3% advantage at 3.8 cm versus 2.5 and 5.1 cm in 2013.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 3.8e0
- Outcome
- advantagee0
- Direction
- advantagee0
- Value
- ∼3%e0
- Comparator
- 2.5 and 5.1 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“∼3% advantage at 3.8 vs. 2.5 and 5.1 cm in 2013”
t0“Corn”
Claim · model-written summary
On those silt loams, yield showed no difference in 2014.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- differencee0
- Direction
- no differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no difference in 2014”
t0“Corn”
Claim · model-written summary
On somewhat poorly drained silty clay loams under no-till, yields differed about 5.5% and peaked at about 4.2 cm.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yieldse0
- Value
- ∼5.5%e0
- Qualifier
- ∼4.2 cm in both yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“∼5.5% difference with maximum yields predicted at ∼4.2 cm in both years”
t0“Corn”
Claim · model-written summary
On somewhat poorly drained plowed silt loam, 6.4 cm had a 9–15% yield advantage over 5.1 and 3.8 cm, with maximum predicted yields deeper than 5.78 cm.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- 6.4e0
- Outcome
- maximum yieldse0
- Direction
- advantagee0
- Value
- 9–15%e0
- Qualifier
- >5.78 cm in both yearse0
- Comparator
- 5.1 and 3.8 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“9–15% advantage for 6.4 vs. 5.1 and 3.8 cm, respectively; maximum yields predicted at >5.78 cm in both years”
t0“Corn”
Claim · model-written summary
Under reduced tillage on somewhat poorly drained silt loams, populations responded quadratically and peaked at 5.45 cm in 2013.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- populationse0
- Direction
- positive quadratic responsee0
- Value
- 5.45 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“populations had a positive quadratic response (maximum populations predicted at 5.45 cm)”
t0“Corn”
Claim · model-written summary
Yield had a positive linear response in 2013 on those soils.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yielde0
- Direction
- positive linear responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield had a positive linear response in 2013”
t0“Corn”
Claim · model-written summary
Population had a negative linear response in 2014 on those soils.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- plant populationse0
- Direction
- negative linear responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant populations had a negative linear response”
t0“Corn”
Claim · model-written summary
Yield had no seeding-depth response in 2014 on those soils.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yielde0
- Direction
- no responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield had no response in 2014”
t0“Corn”
Claim · model-written summary
Weather after planting affected yield responses inconsistently.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- yield responsese0
- Qualifier
- inconsistentlye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weather conditions after planting affected yield responses inconsistently”
t0“Corn”
Claim · model-written summary
The authors recommend seeding depths of 3.8–5.1 cm on silty clay loams and 3.8–6.4 cm on silt loams.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- seeding depths should probably range from 3.8 to 5.1 cm on silty clay loams and from 3.8 to 6.4 cm on silt loamse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seeding depths should probably range from 3.8 to 5.1 cm on silty clay loams and from 3.8 to 6.4 cm on silt loams”
t0“Corn”