Abstract
Abstract Controlled trickle irrigation applications in commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California were used to estimate crop coefficients (K c ) relating applied water requirements to reference evapotranspiration (ET o ) and Class A pan evaporation (E pan ). The value of K c increased with foliar growth during spring and leveled off at a relatively constant maximum through summer and early autumn. Since rates of ET o averaged 13% higher than E pan , lower K c values were recommended for irrigation schedules based on ET o than for schedules based on E pan . The value of maximum K c for ET o scheduling was fixed between 0.45 ≤ K c ≤ 0.7, whereas the limits for E pan scheduling were 0.55 ≤ K c ≤ 0.8. Upper K c limits were established by scheduling small volume irrigations only as necessary to maintain favorable soil moisture conditions. Harvest results and soil matric potential measurements indicated that irrigations scheduled at the lower K c limits could lead to production loss. An evaluation of grower irrigation practices showed that current applied water rates could be reduced significantly by scheduling irrigations with recommended K c values.
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Claims 8
Claim · model-written summary
The strawberry crop coefficient increased with foliar growth in spring.
- Taxon
- Fragaria xananassa
_single2.jpg?width=60)
Fragaria ×ananassae1 - Material
- Heidie1
- Outcome
- value of K ce2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e2“The value of K c increased with foliar growth during spring and leveled off at a relatively constant maximum through summer and early autumn”
Claim · model-written summary
The strawberry crop coefficient leveled off at a relatively constant maximum through summer and early autumn.
- Taxon
- Fragaria xananassaFragaria ×ananassae1
- Material
- Heidie1
- Outcome
- value of K ce2
- Direction
- leveled offe2
- Qualifier
- relatively constant maximume2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e2“The value of K c increased with foliar growth during spring and leveled off at a relatively constant maximum through summer and early autumn”
Claim · model-written summary
Reference ET o averaged 13% higher than Class A pan evaporation.
- Taxon
- Fragaria xananassaFragaria ×ananassae1
- Material
- Heidie1
- Outcome
- rates of ET oe3
- Direction
- highere3
- Value
- 13%e3
- Comparator
- E pane3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e3“Since rates of ET o averaged 13% higher than E pan”
Claim · model-written summary
Lower K c values are recommended for irrigation schedules based on ET o than for schedules based on pan evaporation.
- Taxon
- Fragaria xananassaFragaria ×ananassae1
- Treatment
- irrigation schedules based on ET oe4
- Outcome
- K c valuese4
- Direction
- lowere4
- Comparator
- schedules based on E pane4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e4“lower K c values were recommended for irrigation schedules based on ET o than for schedules based on E pan”
Claim · model-written summary
Maximum K c for ET o scheduling should be between 0.45 and 0.7.
- Taxon
- Fragaria xananassaFragaria ×ananassae1
- Outcome
- maximum K c for ET o schedulinge5
- Value
- 0.45 ≤ K c ≤ 0.7e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e5“The value of maximum K c for ET o scheduling was fixed between 0.45 ≤ K c ≤ 0.7”
Claim · model-written summary
Limits for E pan scheduling should be between 0.55 and 0.8.
- Taxon
- Fragaria xananassaFragaria ×ananassae1
- Outcome
- limits for E pan schedulinge6
- Value
- 0.55 ≤ K c ≤ 0.8e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e6“whereas the limits for E pan scheduling were 0.55 ≤ K c ≤ 0.8”
Claim · model-written summary
Irrigations scheduled at the lower K c limits could lead to production loss.
- Taxon
- Fragaria xananassaFragaria ×ananassae1
- Treatment
- irrigations scheduled at the lower K c limitse7
- Outcome
- production losse7
- Qualifier
- could lead toe7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e7“Harvest results and soil matric potential measurements indicated that irrigations scheduled at the lower K c limits could lead to production loss”
Claim · model-written summary
Scheduling irrigations with recommended K c values could significantly reduce applied water rates compared with current practice.
- Taxon
- Fragaria xananassaFragaria ×ananassae1
- Treatment
- scheduling irrigations with recommended K c valuese2
- Outcome
- applied water ratese2
- Direction
- reducede2
- Comparator
- current applied water ratese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“commercial strawberry [ Fragaria xananassa Duch. ‘Heidi’] plantings in coastal California”
e2“current applied water rates could be reduced significantly by scheduling irrigations with recommended K c values”
The same questions in other papers
irrigation · yield · Fragaria x ananassa (strawberry)Results differ
24 papers in the same direction as this paper · 40 in the opposite direction
- positive
- positive
- positive
61 papers more in this group
See all 65 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.