Abstract
Abstract Many coarse‐textured surface soils in the southeastern Coastal Plain are prone to develop tillage pans which restrict root proliferation and moisture utilization in subsoils. The effect of tillage treatments on soybean [ Glycine max (L.) Merr.] growth and soil moisture utilization was investigated on Norfolk sandy loam (Typic Paleudult) and Wagram loamy sand (Arenic Paleudult) soils. The three tillage treatments used were: conventional moldboard plowing and disking only before planting; or plowing and asking, followed by either chisel‐plowing; or subsoiling with bedding before planting. Measurements were made of top and root dry weight, leaf area, grain yield, soil water content and soil moisture tension. Breaking the tillage pan by chisel‐plowing or subsoiling increased top growth and leaf area of soybeans at full bloom. The percentage of roots below 30 cm was increased by subsoiling and chisel‐plowing when rainfall was below normal during the growth period. A higher proportion of roots was in the top 10 cm of soil with conventional tillage than with chisel‐plowing or subsoiling. Chisel‐plowing and subsoiling increased the amount of soil moisture utilized below a depth of 30 cm. Grain yields were increased by chisel‐plowing or subsoiling in those years when rainfall was below normal during lateflowering and the beginning of pod development. Subsoiling or chisel‐plowing of soils with compacted pans will increase soybean yields during years in which below‐average precipitation occurs during late‐flowering and the beginning of pod set. Yield increases are attributed to increased root proliferation below the pan and greater utilization of subsoil moisture.
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Claims 6
Claim · model-written summary
Chisel-plowing or subsoiling increased soybean top growth and leaf area at full bloom.
- Taxon
- soybeans
Glycine maxe0 - Organ / stage
- full bloome0
- Treatment
- chisel‐plowing or subsoilinge0
- Outcome
- top growth and leaf areae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Breaking the tillage pan by chisel‐plowing or subsoiling increased top growth and leaf area of soybeans at full bloom.”
Claim · model-written summary
Subsoiling and chisel-plowing increased the percentage of roots below 30 cm under below-normal rainfall.
- Treatment
- subsoiling and chisel‐plowinge0
- Outcome
- percentage of roots below 30 cme0
- Direction
- increasede0
- Qualifier
- rainfall was below normal during the growth periode0
Not reportedTaxonComparator
Verbatim
e0“The percentage of roots below 30 cm was increased by subsoiling and chisel‐plowing when rainfall was below normal during the growth period.”
Claim · model-written summary
Conventional tillage had a higher proportion of roots in the top 10 cm than chisel-plowing or subsoiling.
- Organ / stage
- rootse0
- Treatment
- conventional tillagee0
- Outcome
- proportion of rootse0
- Direction
- highere0
- Qualifier
- top 10 cm of soile0
- Comparator
- chisel‐plowing or subsoilinge0
Not reportedTaxon
Verbatim
e0“A higher proportion of roots was in the top 10 cm of soil with conventional tillage than with chisel‐plowing or subsoiling.”
Claim · model-written summary
Chisel-plowing and subsoiling increased soil moisture utilization below 30 cm.
- Treatment
- Chisel‐plowing and subsoilinge0
- Outcome
- amount of soil moisture utilized below a depth of 30 cme0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“Chisel‐plowing and subsoiling increased the amount of soil moisture utilized below a depth of 30 cm.”
Claim · model-written summary
Chisel-plowing or subsoiling increased grain yield in years of below-normal rainfall during late flowering and early pod development.
- Treatment
- chisel‐plowing or subsoilinge0
- Outcome
- Grain yieldse0
- Direction
- increasede0
- Qualifier
- rainfall was below normal during lateflowering and the beginning of pod developmente0
Not reportedTaxonComparator
Verbatim
e0“Grain yields were increased by chisel‐plowing or subsoiling in those years when rainfall was below normal during lateflowering and the beginning of pod development.”
Claim · model-written summary
The authors attribute yield increases to root proliferation below the pan and greater subsoil moisture use.
- Outcome
- Yield increasese0
- Qualifier
- increased root proliferation below the pan and greater utilization of subsoil moisturee0
Not reportedTaxon
Verbatim
e0“Yield increases are attributed to increased root proliferation below the pan and greater utilization of subsoil moisture.”
The same questions in other papers
tillage · growth · Glycine max (soybean)Results differ
51 papers in the same direction as this paper · 28 in the opposite direction · 4 reporting no difference from an alternative
- negative
- negative
- negative
80 papers more in this group
See all 84 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.