Abstract
Double‐cropping soybean [ Glycine max (L.) Merr.] after harvesting wheat ( Triticum aestivum L.) is an important production system in the mid‐southern USA. Field studies were conducted at Stoneville, MS (33°26′ N lat) to evaluate the seed yield and net returns from early soybean maturity groups grown in a double‐crop system under limited irrigation and to compare the results with those from a full‐season system. Soybean cultivars from maturity groups (MG) III, IV, and V were used. Double‐cropped soybean yields ranged from 2055 to 3767 kg ha −1 and were 10 to 40% lower than their full‐season counterparts. For both systems, the average yield and net returns from MG IV, in particular the late IV cultivars, were among the highest, whereas those from MG III and late V were generally the lowest. The net returns from the full‐season soybean averaged $85 to 274 ha −1 higher than those from the double‐cropped soybean; however, the net returns from the double‐cropped wheat more than compensated for these differences. The 3‐yr average wheat yield was 5170 kg ha −1 and accounted for more than 60% of the combined net returns from the double‐crop system. These results indicate that yields and net returns from double‐cropped MG III or IV soybean could be equal or greater than MG V cultivars, but the late MG IV provided the highest yield and economic return. The data indicated that wheat–soybean double‐crop system using MG III or IV under limited irrigation was more profitable than the full‐season soybean system.
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Claims 9
Claim · model-written summary
Double-cropped soybean yields were 10 to 40% lower than full-season soybean yields.
- Taxon
- Soybean
Glycine maxe0 - Treatment
- Double‐croppede1
- Outcome
- yieldse1
- Direction
- lowere1
- Value
- 10 to 40%e1
- Comparator
- full‐season counterpartse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean cultivars from maturity groups (MG) III, IV, and V were used”
e1“Double‐cropped soybean yields ranged from 2055 to 3767 kg ha −1 and were 10 to 40% lower than their full‐season counterparts”
Claim · model-written summary
Full-season soybean net returns averaged $85 to 274 ha-1 higher than double-cropped soybean net returns.
- Taxon
- SoybeanGlycine maxe0
- Treatment
- full‐season soybeane2
- Outcome
- net returnse2
- Direction
- highere2
- Value
- $85 to 274 ha −1e2
- Comparator
- double‐cropped soybeane2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean cultivars from maturity groups (MG) III, IV, and V were used”
e2“The net returns from the full‐season soybean averaged $85 to 274 ha −1 higher than those from the double‐cropped soybean”
Claim · model-written summary
Net returns from double-cropped wheat more than compensated for the net return differences between the systems.
- Taxon
- wheat
Triticum aestivume3 - Outcome
- net returnse3
- Qualifier
- more than compensated for these differencese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“the net returns from the double‐cropped wheat more than compensated for these differences”
Claim · model-written summary
The 3-year average double-crop wheat yield was 5170 kg/ha.
- Taxon
- wheatTriticum aestivume4
- Outcome
- wheat yielde4
- Value
- 5170 kg ha −1e4
- Qualifier
- 3‐yr averagee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The 3‐yr average wheat yield was 5170 kg ha −1 and accounted for more than 60% of the combined net returns from the double‐crop system”
Claim · model-written summary
Double-crop wheat accounted for more than 60% of the combined net returns from the double-crop system.
- Taxon
- wheatTriticum aestivume4
- Outcome
- combined net returnse4
- Value
- more than 60%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The 3‐yr average wheat yield was 5170 kg ha −1 and accounted for more than 60% of the combined net returns from the double‐crop system”
Claim · model-written summary
Average yield and net returns from MG IV, especially the late IV cultivars, were among the highest in both systems.
- Taxon
- SoybeanGlycine maxe0
- Material
- MG IVe5
- Outcome
- average yield and net returnse5
- Direction
- among the higheste5
- Qualifier
- late IV cultivarse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean cultivars from maturity groups (MG) III, IV, and V were used”
e5“For both systems, the average yield and net returns from MG IV, in particular the late IV cultivars, were among the highest, whereas those from MG III and late V were generally the lowest”
Claim · model-written summary
Average yield and net returns from MG III and late V were generally the lowest in both systems.
- Taxon
- SoybeanGlycine maxe0
- Material
- MG III and late Ve5
- Outcome
- average yield and net returnse5
- Direction
- generally the loweste5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean cultivars from maturity groups (MG) III, IV, and V were used”
e5“For both systems, the average yield and net returns from MG IV, in particular the late IV cultivars, were among the highest, whereas those from MG III and late V were generally the lowest”
Claim · model-written summary
Double-cropped MG III or IV soybean yields and net returns could equal or exceed those of MG V cultivars.
- Taxon
- soybeanGlycine maxe6
- Material
- MG III or IVe6
- Outcome
- yields and net returnse6
- Direction
- equal or greatere6
- Comparator
- MG V cultivarse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean cultivars from maturity groups (MG) III, IV, and V were used”
e6“yields and net returns from double‐cropped MG III or IV soybean could be equal or greater than MG V cultivars”
Claim · model-written summary
The wheat-soybean double-crop system using MG III or IV under limited irrigation was more profitable than the full-season soybean system.
- Taxon
- soybeanGlycine maxe7
- Material
- MG III or IVe7
- Treatment
- limited irrigatione7
- Outcome
- profitablee7
- Direction
- more profitablee7
- Comparator
- full‐season soybean systeme7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean cultivars from maturity groups (MG) III, IV, and V were used”
e7“using MG III or IV under limited irrigation was more profitable than the full‐season soybean system”
The same questions in other papers
irrigation · yield · Glycine max (soybean)Positive and negative results
263 papers in the same direction as this paper · 72 in the opposite direction · 7 reporting no difference from an alternative
- positive
- negative
- negative
339 papers more in this group
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