Abstract
Abstract Results from initial experiments in western Nebraska suggest that opportunity exists to decrease seeding rates of pea ( Pisum sativum L.) to optimize yield while maintaining partial net return. Refined planting recommendations, especially planting time, are still largely unknown for western Nebraska. This experiment evaluated the effects of seeding rates and planting dates of pea on emergence, grain yield, and grain yield components. Two locations in Nebraska were evaluated in 2018 and 2019. Treatments consisted of three planting dates and five seeding rates arranged as a split‐plot design. Emergence was measured in each plot until emergence stabilized. Whole plant biomass, pods plant –1 , seeds plant –1 , and harvest index were recorded at harvest. Planting later resulted in increased plant density and decreased time to 50 and 90% emergence. Planting date also changed the economically optimal plant population. At Sidney in 2018, optimal plant population changed from 96 plants m –2 (early) and 115 plants m –2 (late) to 82 plants m –2 (middle). Partial net return was increased by US$26.74 ha –1 and US$65.43 ha –1 with the middle planting date over the early and late planting dates. Across three site‐years, the economically optimal plant population only varied by 4 plants m –2 between the three planting dates. Later planting improves percent emergence without reducing yield. Seeding rates that have been adjusted for expected germination should target a population between 70 and 109 plants m –2 to optimize partial net return. Final plant population influences grain yield more than planting date, although both affect yield response.
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Claims 11
Claim · model-written summary
Later planting of pea increased plant density.
Not reportedComparator
Verbatim
t0“field pea”
e1“Planting later resulted in increased plant density and decreased time to 50 and 90% emergence”
Claim · model-written summary
Later planting of pea decreased time to 50 and 90% emergence.
Not reportedComparator
Verbatim
t0“field pea”
e1“Planting later resulted in increased plant density and decreased time to 50 and 90% emergence”
Claim · model-written summary
Planting date changed the economically optimal plant population of pea.
- Taxon
- field peat0
- Treatment
- Planting datee1
- Outcome
- economically optimal plant populatione1
- Direction
- changede1
Not reportedComparator
Verbatim
t0“field pea”
e1“Planting date also changed the economically optimal plant population”
Claim · model-written summary
At Sidney in 2018, the optimal pea plant population was 82 plants m-2 for the middle planting date, versus 96 for early and 115 for late.
Verbatim
t0“field pea”
e1“At Sidney in 2018, optimal plant population changed from 96 plants m –2 (early) and 115 plants m –2 (late) to 82 plants m –2 (middle)”
Claim · model-written summary
Partial net return of pea increased by US$26.74 per ha with the middle planting date over the early planting date.
Verbatim
t0“field pea”
e1“Partial net return was increased by US$26.74 ha –1 and US$65.43 ha –1 with the middle planting date over the early and late planting dates”
Claim · model-written summary
Partial net return of pea increased by US$65.43 per ha with the middle planting date over the late planting date.
Verbatim
t0“field pea”
e1“Partial net return was increased by US$26.74 ha –1 and US$65.43 ha –1 with the middle planting date over the early and late planting dates”
Claim · model-written summary
Across three site-years, the economically optimal plant population varied by only 4 plants m-2 between the three planting dates.
- Taxon
- field peat0
- Treatment
- three planting datese1
- Outcome
- economically optimal plant populatione1
- Direction
- variede1
- Value
- 4 plants m –2e1
Not reportedComparator
Verbatim
t0“field pea”
e1“Across three site‐years, the economically optimal plant population only varied by 4 plants m –2 between the three planting dates”
Claim · model-written summary
Later planting improves percent emergence of pea.
Not reportedComparator
Verbatim
t0“field pea”
e1“Later planting improves percent emergence without reducing yield”
Claim · model-written summary
Later planting did not reduce pea yield.
Not reportedComparator
Verbatim
t0“field pea”
e1“Later planting improves percent emergence without reducing yield”
Claim · model-written summary
Seeding rates adjusted for expected germination should target a population between 70 and 109 plants m-2 to optimize partial net return.
Verbatim
t0“field pea”
e1“Seeding rates that have been adjusted for expected germination should target a population between 70 and 109 plants m –2 to optimize partial net return”
Claim · model-written summary
Final plant population influences pea grain yield more than planting date, although both affect yield response.
Verbatim
t0“field pea”
e1“Final plant population influences grain yield more than planting date, although both affect yield response”
The same questions in other papers
sowing time · yield · Lathyrus oleraceus (pea)Positive and negative results
24 papers in the same direction as this paper · 11 in the opposite direction
- no effect
- positive
- positive
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See all 36 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.