Abstract
Abstract Soybean [ Glycine max (L.) Merr.] grown without tillage often produces less grain on silty clay loam soils than soybean produced under conventional tillage. A 3‐yr (1982, 1983, and 1984) study was conducted to gain a better understanding of the factors affecting yield differences between conventional and no‐till soybean production systems on silty clay loam soils. The study was conducted near Columbia, MO, on a Mexico silt loam soil (Udollic and Mollic Ochraqualf). Conventional tillage consisted of spring moldboard plowing and secondary tillage. The no‐till treatment received a foliar application of glyphosate [N‐(phosphonomethyl) glycine] at the time of planting. Soybean grain yields were less for no‐till in 1982 (1890 kg/ha vs. 2260 kg/ha) and greater in 1983 (2310 kg/ha vs. 1510 kg/ha) and 1984 (1870 kg/ha vs. 1670 kg/ha). Seasonal rainfall was above average in 1982 and below average in 1983 and 1984. In 1983 and 1984, soybean in the no‐till plots depleted greater soil moisture at soil depths of 840 and 990 mm and had less plant water stress during podfilling, with afternoon leaf water potential measurements averaging 0.11 MPa greater in 1983 and 0.34 MPa greater in 1984, than soybean grown under conventional tillage. Conventionally tilled soybean had a greater yield potential due to greater vegetative growth, but with less than adequate rainfall the soybean in no‐till had less plant water stress, resulting in greater yields.
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Claims 8
Claim · model-written summary
No-till soybean yielded less than conventional tillage in 1982 (1890 versus 2260 kg/ha).
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean grain yields were less for no‐till in 1982 (1890 kg/ha vs. 2260 kg/ha)”
Claim · model-written summary
No-till soybean yielded more in 1983 (2310 versus 1510 kg/ha).
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean grain yields were less for no‐till in 1982 (1890 kg/ha vs. 2260 kg/ha) and greater in 1983 (2310 kg/ha vs. 1510 kg/ha)”
Claim · model-written summary
No-till soybean yielded more in 1984 (1870 versus 1670 kg/ha).
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean grain yields were less for no‐till in 1982 (1890 kg/ha vs. 2260 kg/ha) and greater in 1983 (2310 kg/ha vs. 1510 kg/ha) and 1984 (1870 kg/ha vs. 1670 kg/ha)”
Claim · model-written summary
No-till plots depleted more soil moisture at depths of 840 and 990 mm in 1983 and 1984.
- Taxon
- soybean
Glycine maxe0 - Treatment
- no‐tille0
- Outcome
- soil moisturee0
- Direction
- greatere0
- Qualifier
- soil depths of 840 and 990 mme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean in the no‐till plots depleted greater soil moisture at soil depths of 840 and 990 mm”
Claim · model-written summary
No-till soybean had less plant water stress during podfilling in 1983 and 1984.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- podfillinge0
- Outcome
- plant water stresse0
- Direction
- lesse0
- Comparator
- soybean grown under conventional tillagee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“had less plant water stress during podfilling, with afternoon leaf water potential measurements averaging 0.11 MPa greater in 1983 and 0.34 MPa greater in 1984, than soybean grown under conventional tillage”
Claim · model-written summary
No-till leaf water potential averaged 0.11 MPa greater in 1983.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- afternoon leaf water potentiale0
- Direction
- greatere0
- Value
- 0.11 MPae0
- Comparator
- soybean grown under conventional tillagee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“afternoon leaf water potential measurements averaging 0.11 MPa greater in 1983 and 0.34 MPa greater in 1984, than soybean grown under conventional tillage”
t0“Soybean”
Claim · model-written summary
No-till leaf water potential averaged 0.34 MPa greater in 1984.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- afternoon leaf water potentiale0
- Direction
- greatere0
- Value
- 0.34 MPae0
- Comparator
- soybean grown under conventional tillagee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“afternoon leaf water potential measurements averaging 0.11 MPa greater in 1983 and 0.34 MPa greater in 1984, than soybean grown under conventional tillage”
t0“Soybean”
Claim · model-written summary
Conventional tillage gave soybean greater yield potential due to greater vegetative growth.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Conventionally tillede0
- Outcome
- yield potentiale0
- Direction
- greatere0
- Qualifier
- greater vegetative growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conventionally tilled soybean had a greater yield potential due to greater vegetative growth”
The same questions in other papers
tillage · yield · Glycine max (soybean)Positive and negative results
263 papers in the same direction as this paper · 100 in the opposite direction · 26 reporting no difference from an alternative
- no effect
- positive
- positive
386 papers more in this group
See all 390 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.