Abstract
Abstract Enhanced corn ( Zea mays L.) yield responses to rotation in no‐till systems may be due to the types and amounts of surface‐placed plant residue. Research in 1989, 1990, and 1995 evaluated no‐till corn yield response to various preceding crops and examined whether in‐row residue removal affected no‐till corn response to rotation crops. The soil was an imperfectly drained loam (medium, mixed, weakly to moderately calcareous Typic Hapludalf). The preceding crops were: corn harvested for grain or whole‐plant silage; hard red spring wheat ( Triticum aestivum L.); barley ( Hordeum vulgare L.); red clover ( Trifolium pratense L.) cover crops, following barley, that were killed by spraying either 3 wk (early‐kill) or 1 d (late‐kill) prior to corn planting; canola ( Brassica napus L.); and soybean [ Glycine max (L.) Merr.]. In‐row residue was either retained while planting or cleared using planter‐mounted, notched‐disk row cleaners. Clearing in‐row cover crop residue increased early‐season corn growth and was associated with yield increases of 0.61 Mg ha −1 (8%) following early‐killed red clover and 0.43 Mg ha −1 (6%) ( P = 0.10) following late‐killed red clover. In 2 of 3 yr, corn yields following early‐killed red clover were similar to following soybean and greater than following grain corn, provided that in‐row residue was cleared. Following the other crops, grain yield response to clearing in‐row residue was smaller and less consistent over years. Preceding cropping affected early‐season corn growth, with the largest plants at 5 wk after planting following either soybean or silage corn and the smallest following either red clover or grain corn. In 2 of 3 yr, when preceding crop effects on grain yield were statistically significant, yields following either soybean or spring wheat were more than 1.05 Mg ha −1 (16%) higher than after grain corn. That yield increase occurred regardless of in‐row residue placement. Removing corn stover by harvesting as silage increased corn yield by 0.86 Mg ha −1 (12%) over yield following grain corn. During 1995, corn yield following silage corn was less than after soybean, canola, barley, or wheat; thus, no‐till corn yield response to rotation is not exclusively due to the presence of surface‐placed stover. In‐row residue placement and preceding cropping practices affected in‐row soil temperature, but this could not totally account for the treatment effects on early‐season corn growth and yields.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Clearing cover-crop residue increased early corn growth.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- Clearing in‐row cover crop residuee0
- Outcome
- early‐season corn growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Clearing in‐row cover crop residue increased early‐season corn growth”
t0“corn”
Claim · model-written summary
Residue clearing was associated with 0.61 Mg ha −1 higher yield after early-killed clover.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- early‐killed red clovere0
- Outcome
- yielde0
- Direction
- increasese0
- Value
- 0.61 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was associated with yield increases of 0.61 Mg ha −1 (8%) following early‐killed red clover”
t0“corn”
Claim · model-written summary
Residue clearing was associated with 0.43 Mg ha −1 higher yield after late-killed clover.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- late‐killed red clovere0
- Outcome
- yielde1
- Value
- 0.43 Mg ha −1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.43 Mg ha −1 (6%) ( P = 0.10) following late‐killed red clover.”
t0“corn”
e1“was associated with yield increases of 0.61 Mg ha −1 (8%) following early‐killed red clover”
Claim · model-written summary
With in-row residue cleared, yields after early-killed clover matched soybean and exceeded grain corn in two of three years.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- corn yieldse0
- Direction
- greater thane0
- Qualifier
- In 2 of 3 yre0
- Comparator
- grain corne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2 of 3 yr, corn yields following early‐killed red clover were similar to following soybean and greater than following grain corn, provided that in‐row residue was cleared.”
Claim · model-written summary
Yield response to clearing residue after other crops was smaller and less consistent.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- grain yield responsee0
- Direction
- smallere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Following the other crops, grain yield response to clearing in‐row residue was smaller and less consistent over years.”
t0“corn”
Claim · model-written summary
At five weeks, corn plants were largest after soybean or silage corn.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- largest plantse0
- Direction
- largeste0
- Qualifier
- 5 wk after plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the largest plants at 5 wk after planting following either soybean or silage corn”
t0“corn”
Claim · model-written summary
At five weeks, corn plants were smallest after red clover or grain corn.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- smalleste0
- Direction
- smalleste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the smallest following either red clover or grain corn.”
t0“corn”
Claim · model-written summary
In two years, yield after soybean or spring wheat exceeded grain corn by over 1.05 Mg ha −1.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- grain yielde0
- Direction
- highere0
- Value
- 1.05 Mg ha −1e0
- Comparator
- grain corne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 2 of 3 yr, when preceding crop effects on grain yield were statistically significant, yields following either soybean or spring wheat were more than 1.05 Mg ha −1 (16%) higher than after grain corn.”
t0“corn”
Claim · model-written summary
Harvesting corn as silage increased following corn yield by 0.86 Mg ha −1.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Removing corn stover by harvesting as silagee0
- Outcome
- corn yielde0
- Direction
- increasede0
- Value
- 0.86 Mg ha −1e0
- Comparator
- grain corne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Removing corn stover by harvesting as silage increased corn yield by 0.86 Mg ha −1 (12%) over yield following grain corn.”
Claim · model-written summary
In 1995, yield after silage corn was lower than after soybean, canola, barley or wheat.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- corn yielde0
- Direction
- less thane0
- Comparator
- soybean, canola, barley, or wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During 1995, corn yield following silage corn was less than after soybean, canola, barley, or wheat”
Claim · model-written summary
In-row residue placement and preceding crop affected in-row soil temperature.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- in‐row soil temperaturee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In‐row residue placement and preceding cropping practices affected in‐row soil temperature”
t0“corn”
The same questions in other papers
Zea mays subsp. mays · yield · Zea mays (maize)Results differ
195 papers in the same direction as this paper · 85 in the opposite direction · 11 reporting no difference from an alternative
- no effect
- no effect
- negative
288 papers more in this group
See all 292 papers →processing · yield · Zea mays (maize)Positive and negative results
38 papers in the same direction as this paper · 14 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
50 papers more in this group
See all 54 papers →organic · growth · Zea mays (maize)Positive and negative results
114 papers in the same direction as this paper · 11 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- no effect
125 papers more in this group
See all 129 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.