Abstract
Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system. The experiment was conducted under three levels of water application deficit which were: fully irrigation (with 100% of soil moisture content at field capacity), 80%, and 60% of soil moisture content at field capacity. For all levels of water deficit, the highest percentage of water application depth (31.02%), occurred during mid - season stage. The higher crop evapotranspiration (Etc) value was (6.94 mm. d-1) observed after 35 days from planting with fully irrigation. At 100% of soil moisture content at field capacity, the average value of crop coefficient (Kc) was 0.696, 0.615, 0.673 and 0.60 for initial, development, mid – season, and harvesting stage respectively. The average values of water stress coefficient (Ks) in development and harvesting stages illustrated that the crop extract from root zone without suffering water stress in the readily available water because of the root zone depletion was smaller than the radial available water in root zone. The highest seed yield (1.12 Mg/feddan) was observed with fully irrigation, while the lowest (0.67 Mg/feddan) was with 60% of field capacity. This lowest value of seed yield was associated with low number of pods/plant (14.6 pods /plant) and small increase in number of seeds per pod (11.00 seeds/pod) and average seed weight (20 g/plant). Increasing the deficit percent of water application resulted in progressively lower water use efficiency. At 80 % of field capacity, water use efficiency was 0.68 kg/m3 while, it decreased to 0.59 kg/m3 as the deficit percent increased from 80% to 60% of soil moisture content at field capacity.
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Claims 11
Claim · model-written summary
The highest percentage of water application depth occurred during the mid-season stage at all deficit levels.
- Taxon
- Cowpea
Vigna unguiculatae0 - Organ / stage
- mid - season stagee1
- Outcome
- water application depthe1
- Value
- 31.02%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e1“For all levels of water deficit, the highest percentage of water application depth (31.02%), occurred during mid - season stage”
Claim · model-written summary
Crop evapotranspiration was highest, 6.94 mm per day, after 35 days from planting under full irrigation.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- fully irrigatione2
- Outcome
- crop evapotranspiration (Etc) valuee2
- Direction
- highere2
- Value
- 6.94 mm. d-1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e2“The higher crop evapotranspiration (Etc) value was (6.94 mm. d-1) observed after 35 days from planting with fully irrigation”
Claim · model-written summary
At full irrigation, average crop coefficients were 0.696, 0.615, 0.673 and 0.60 for the initial, development, mid-season and harvesting stages.
- Taxon
- CowpeaVigna unguiculatae0
- Organ / stage
- initial, development, mid – season, and harvesting stagee3
- Treatment
- 100% of soil moisture content at field capacitye3
- Outcome
- crop coefficient (Kc)e3
- Value
- 0.696, 0.615, 0.673 and 0.60e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e3“At 100% of soil moisture content at field capacity, the average value of crop coefficient (Kc) was 0.696, 0.615, 0.673 and 0.60 for initial, development, mid – season, and harvesting stage respectively”
Claim · model-written summary
The average water stress coefficient in the development and harvesting stages indicated no water stress in the readily available water of the root zone.
- Taxon
- CowpeaVigna unguiculatae0
- Organ / stage
- development and harvesting stagese4
- Outcome
- water stress coefficient (Ks)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e4“The average values of water stress coefficient (Ks) in development and harvesting stages illustrated that the crop extract from root zone without suffering water stress in the readily available water because of the root zone depletion was smaller than the radial available water in root zone”
Claim · model-written summary
Full irrigation gave the highest seed yield, 1.12 Mg per feddan.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- fully irrigatione5
- Outcome
- seed yielde5
- Direction
- higheste5
- Value
- 1.12 Mg/feddane5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e5“The highest seed yield (1.12 Mg/feddan) was observed with fully irrigation, while the lowest (0.67 Mg/feddan) was with 60% of field capacity”
Claim · model-written summary
The lowest seed yield, 0.67 Mg per feddan, occurred at 60% of field capacity.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- 60% of field capacitye5
- Outcome
- seed yielde5
- Direction
- loweste5
- Value
- 0.67 Mg/feddane5
- Comparator
- fully irrigatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e5“The highest seed yield (1.12 Mg/feddan) was observed with fully irrigation, while the lowest (0.67 Mg/feddan) was with 60% of field capacity”
Claim · model-written summary
The lowest seed yield was associated with a low number of pods per plant, 14.6 pods per plant.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- 60% of field capacitye5
- Outcome
- number of pods/plante6
- Direction
- lowe6
- Value
- 14.6 pods /plante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e5“The highest seed yield (1.12 Mg/feddan) was observed with fully irrigation, while the lowest (0.67 Mg/feddan) was with 60% of field capacity”
e6“This lowest value of seed yield was associated with low number of pods/plant (14.6 pods /plant) and small increase in number of seeds per pod (11.00 seeds/pod) and average seed weight (20 g/plant)”
Claim · model-written summary
The lowest seed yield was associated with a small increase in the number of seeds per pod, 11.00 seeds per pod.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- 60% of field capacitye5
- Outcome
- number of seeds per pode6
- Direction
- small increasee6
- Value
- 11.00 seeds/pode6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e5“The highest seed yield (1.12 Mg/feddan) was observed with fully irrigation, while the lowest (0.67 Mg/feddan) was with 60% of field capacity”
e6“This lowest value of seed yield was associated with low number of pods/plant (14.6 pods /plant) and small increase in number of seeds per pod (11.00 seeds/pod) and average seed weight (20 g/plant)”
Claim · model-written summary
The lowest seed yield was associated with an average seed weight of 20 g per plant.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- 60% of field capacitye5
- Outcome
- average seed weighte6
- Value
- 20 g/plante6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e5“The highest seed yield (1.12 Mg/feddan) was observed with fully irrigation, while the lowest (0.67 Mg/feddan) was with 60% of field capacity”
e6“This lowest value of seed yield was associated with low number of pods/plant (14.6 pods /plant) and small increase in number of seeds per pod (11.00 seeds/pod) and average seed weight (20 g/plant)”
Claim · model-written summary
Increasing the deficit of water application progressively lowered water use efficiency.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- Increasing the deficit percent of water applicatione7
- Outcome
- water use efficiencye7
- Direction
- progressively lowere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e7“Increasing the deficit percent of water application resulted in progressively lower water use efficiency”
Claim · model-written summary
Water use efficiency decreased to 0.59 kg/m3 when the deficit increased from 80% to 60% of field capacity.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- deficit percente7
- Outcome
- water use efficiencye7
- Direction
- decreasede7
- Value
- 0.59 kg/m3e7
- Qualifier
- 0.68 kg/m3e7
- Comparator
- 80 % of field capacitye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cowpea (Vigna unguiculata, (L.)Walp.) was subjected to water application deficit through a semi-portable sprinkler irrigation system”
e7“At 80 % of field capacity, water use efficiency was 0.68 kg/m3 while, it decreased to 0.59 kg/m3 as the deficit percent increased from 80% to 60% of soil moisture content at field capacity”
The same questions in other papers
irrigation · yield · Vigna unguiculata (cowpea)Positive and negative results
49 papers in the same direction as this paper · 10 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- positive
57 papers more in this group
See all 61 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.