Abstract
Tillage practices have changed rapidly in recent years to help reduce soil erosion associated with moldboard plowing. The effects of tillage practices on other management decisions in soybean [ Glycine max (L.) Merr.] production is unclear. This study was designed to investigate the relationships between tillage, row spacing, and planting date on soybean performance in a corn ( Zea mays L.)‐soybean rotation at three locations and in a soybean‐wheat ( Triticum aestivum L.) rotation at one location. Tillage systems evaluated were fall moldboard plow, fall chisel plow, spring disk, ridge‐till, till plant (no ridge), and no‐till. Soybean was planted in 10‐ and 30‐in. row spacings in early and late May from 1982 through 1985. Percent residue cover after planting ranged from 7 to 15% for moldboard plowing to 74 to 87% for the no‐till system. With a few exceptions, little difference was observed in plant density among any of the tillage systems, although plants were slowest to emerge from the no‐till system and fastest to emerge from the ridge‐till system. Tillage did not consistently affect soybean yield and yield differences were small in most years. The early‐planted soybean yield was equal to or higher than that planted later in all but one case. The yield advantage for 10‐in. rows compared with 30‐in. rows ranged from 8 to 14% when averaged over all tillage systems and both planting dates. Reduced tillage systems had less effect on soybean production than planting date or row spacing.
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Claims 9
Claim · model-written summary
Moldboard plowing left 7 to 15% residue cover after planting.
Not reportedTaxon
Verbatim
e0“Percent residue cover after planting ranged from 7 to 15% for moldboard plowing”
Claim · model-written summary
No-till left 74 to 87% residue cover after planting.
Not reportedTaxon
Verbatim
e0“74 to 87% for the no‐till system”
e1“Percent residue cover after planting ranged from 7 to 15% for moldboard plowing”
Claim · model-written summary
Plant density differed little across tillage systems with a few exceptions.
- Treatment
- tillage systemse0
- Outcome
- plant densitye0
- Direction
- little differencee0
- Qualifier
- With a few exceptionse0
- Comparator
- any of the tillage systemse0
Not reportedTaxon
Verbatim
e0“With a few exceptions, little difference was observed in plant density among any of the tillage systems”
Claim · model-written summary
Soybean plants emerged slowest under no-till.
Not reportedTaxonComparator
Verbatim
e0“plants were slowest to emerge from the no‐till system”
Claim · model-written summary
Soybean plants emerged fastest under ridge-till.
Not reportedTaxonComparator
Verbatim
e0“fastest to emerge from the ridge‐till system”
Claim · model-written summary
Tillage had no consistent soybean-yield effect, and differences were usually small.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Tillagee0
- Outcome
- soybean yielde0
- Direction
- did not consistently affecte0
- Qualifier
- in most yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage did not consistently affect soybean yield and yield differences were small in most years”
Claim · model-written summary
Early planting produced soybean yield equal to or above later planting, except once.
- Taxon
- soybeanGlycine maxe0
- Treatment
- early‐plantede0
- Outcome
- soybean yielde0
- Direction
- equal to or highere0
- Qualifier
- in all but one casee0
- Comparator
- planted latere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The early‐planted soybean yield was equal to or higher than that planted later in all but one case”
Claim · model-written summary
Ten-inch rows yielded 8 to 14% more than 30-inch rows across tillage systems and planting dates.
- Treatment
- 10‐in. rowse0
- Outcome
- yield advantagee0
- Direction
- advantagee0
- Value
- 8 to 14%e0
- Qualifier
- averaged over all tillage systems and both planting datese0
- Comparator
- 30‐in. rowse0
Not reportedTaxon
Verbatim
e0“The yield advantage for 10‐in. rows compared with 30‐in. rows ranged from 8 to 14% when averaged over all tillage systems and both planting dates”
Claim · model-written summary
Reduced tillage had less effect on soybean production than planting date or row spacing.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Reduced tillage systemse0
- Outcome
- soybean productione0
- Direction
- less effecte0
- Comparator
- planting date or row spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced tillage systems had less effect on soybean production than planting date or row spacing”
The same questions in other papers
sowing time · yield · Glycine max (soybean)Positive and negative results
114 papers in the same direction as this paper · 89 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
- negative
203 papers more in this group
See all 207 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.