Abstract
Abstract Intercropping has improved the production of annual food grasses and legumes in several warm‐season areas of the world. Winter cereals intercropped with winter peas may improve winter pea yields in many cool‐season areas. The primary objective of this study was to compare seed yield of winter peas in mono‐ and intercropped culture in northern Idaho. Winter peas ( Pisum sativum spp. arvense L. Poir) were intercropped with either winter wheat ( Triticum aestivum L.) or winter barley ( Hordeum vulgare L.) on a Tilma silt loam (fine, mixed, mesic Xeric Argialboll) in 1980–1981 and on a Palouse silt loam (fine‐silty, mixed, mesic Pachic Ultic Haploxeroll) in 1981–1982. Winter peas and winter cereals were planted either alone or in mixtures containing 25, 50, or 75% winter peas. Seeding rates of 67 and 90 kg ha −1 were used for both monocrops and intercrops. All trials were conducted in fields that had been fallowed for 1 yr prior to planting the intercropping studies. Winter peas in mixtures with 25% winter cereals produced seed yields equal to or 27% greater than ( P < 0.05) monocropped winter peas. Winter cereal yields were reduced an average of 60% ( P < 0.05) when mixed with 25% winter peas (20 winter pea plants m −2 ). Monocropped winter wheat and winter barley produced higher seed yields than intercrops and monocrop winter peas under adequate N conditions, but winter peas produced higher seed yields than intercrops or monocrop winter cereals when N was partially limiting in the spring due to water logging. Seeding rate had no influence on seed yield but did increase plant populations of each species. Winter peas were compatible with winter cereals in both planting and grain harvesting requirements and pea seed can be easily separated from harvested mixtures.
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Claims 8
Claim · model-written summary
Peas mixed with 25% winter cereals yielded equally or 27% more than monocropped peas.
- Taxon
- Winter peas
Lathyrus oleraceuse0 - Treatment
- mixtures with 25% winter cerealse0
- Outcome
- seed yieldse0
- Direction
- equal to or 27% greatere0
- Value
- 27%e0
- Comparator
- monocropped winter pease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter peas in mixtures with 25% winter cereals produced seed yields equal to or 27% greater than ( P < 0.05) monocropped winter peas”
Claim · model-written summary
Winter cereal yield fell by an average of 60% when mixed with 25% winter peas.
- Taxon
- Winter cereale0
- Treatment
- mixed with 25% winter pease0
- Outcome
- Winter cereal yieldse0
- Direction
- reducede0
- Value
- 60%e0
Not reportedComparator
Verbatim
e0“Winter cereal yields were reduced an average of 60% ( P < 0.05) when mixed with 25% winter peas”
Claim · model-written summary
Under adequate nitrogen, monocropped wheat and barley yielded more seed than intercrops and monocropped peas.
- Taxon
- winter wheat and winter barley
.jpg?width=60)
Hordeum vulgare
Triticum aestivume0 - Outcome
- seed yieldse0
- Direction
- highere0
- Qualifier
- adequate N conditionse0
- Comparator
- intercrops and monocrop winter pease0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Monocropped winter wheat and winter barley produced higher seed yields than intercrops and monocrop winter peas under adequate N conditions”
Claim · model-written summary
With spring nitrogen partly limited by waterlogging, peas yielded more seed than intercrops or monocropped cereals.
- Taxon
- winter peasLathyrus oleraceuse0
- Outcome
- seed yieldse0
- Direction
- highere0
- Qualifier
- N was partially limiting in the spring due to water logginge0
- Comparator
- intercrops or monocrop winter cerealse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“winter peas produced higher seed yields than intercrops or monocrop winter cereals when N was partially limiting in the spring due to water logging”
Claim · model-written summary
Seeding rate did not influence seed yield.
Not reportedTaxonComparator
Verbatim
e0“Seeding rate had no influence on seed yield but did increase plant populations of each species”
Claim · model-written summary
Increasing seeding rate increased plant populations of each species.
Not reportedTaxonComparator
Verbatim
e0“Seeding rate had no influence on seed yield but did increase plant populations of each species”
Claim · model-written summary
Peas and cereals were compatible in planting and grain-harvesting requirements.
- Taxon
- Winter peasLathyrus oleraceuse0
- Outcome
- compatible with winter cereals in both planting and grain harvesting requirementse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter peas were compatible with winter cereals in both planting and grain harvesting requirements”
Claim · model-written summary
Pea seed could be separated easily from harvested mixtures.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- pea seed can be easily separated from harvested mixturese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pea seed can be easily separated from harvested mixtures”
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