Abstract
Soybean [ Glycine max (L.) Merr.] has the ability to produce similar yields across a broad range of management systems and planting dates. Our objective was to better understand growth factors affecting yield component compensation in the upper Midwest under different management systems. An older cultivar, Hardin, and two newer cultivars, DeKalb CX232 and Spansoy 250, were grown in five management systems during four growing seasons from 1997 to 2000. Four of the five management systems were located near Arlington, WI, on a silt loam soil consisting of conventional and no‐tillage systems with and without irrigation. The fifth management system was located near Hancock, WI, on a conventionally tilled, irrigated sandy loam soil. Yield component compensations gave similar grain yield among cultivars, planting dates, and management systems. At R6, CX232 and Spansoy 250 averaged greater dry matter (DM) accumulation, leaf area index (LAI), and crop growth rate (CGR) than Hardin. Early planted soybean had more total DM than the late‐planted soybean. No‐tillage systems produced more total DM, LAI, and CGR after R3 than the two conventional tillage systems at Arlington. Irrigated systems had higher LAI than the nonirrigated systems. These results indicate that the compensatory growth and alterations in plant development among cultivars, management systems, and planting dates had no impact on soybean yield.
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Claims 5
Claim · model-written summary
Grain yield was similar among cultivars, dates and systems because of yield component compensation.
- Taxon
- Soybean
Glycine maxt0 - Outcome
- grain yielde0
- Direction
- similare0
- Comparator
- cultivars, planting dates, and management systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield component compensations gave similar grain yield among cultivars, planting dates, and management systems.”
t0“Soybean”
t1“Soybean”
Claim · model-written summary
At R6, CX232 and Spansoy 250 had greater dry matter, LAI and crop growth rate than Hardin.
- Taxon
- SoybeanGlycine maxt0
- Material
- CX232 and Spansoy 250e0
- Organ / stage
- R6e0
- Outcome
- dry matter (DM) accumulation, leaf area index (LAI), and crop growth rate (CGR)e0
- Direction
- greatere0
- Comparator
- Hardine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At R6, CX232 and Spansoy 250 averaged greater dry matter (DM) accumulation, leaf area index (LAI), and crop growth rate (CGR) than Hardin.”
t0“Soybean”
t1“Soybean”
Claim · model-written summary
Early planting produced more total soybean dry matter than late planting.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Early plantede0
- Outcome
- total DMe0
- Direction
- moree0
- Comparator
- late‐plantede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early planted soybean had more total DM than the late‐planted soybean.”
Claim · model-written summary
No-tillage systems had greater total dry matter, LAI and crop growth rate after R3 than conventional tillage.
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- R3e0
- Treatment
- No‐tillage systemse0
- Outcome
- total DM, LAI, and CGRe0
- Direction
- moree0
- Comparator
- two conventional tillage systemse0
- Setting
- Arlingtone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No‐tillage systems produced more total DM, LAI, and CGR after R3 than the two conventional tillage systems at Arlington.”
t0“Soybean”
t1“Soybean”
Claim · model-written summary
Irrigated systems had higher LAI than nonirrigated systems.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Irrigated systemse0
- Outcome
- LAIe0
- Direction
- highere0
- Comparator
- nonirrigated systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigated systems had higher LAI than the nonirrigated systems.”
t0“Soybean”
t1“Soybean”
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