Abstract
Abstract Agricultural crops with low water requirements and drought tolerance are needed for semiarid irrigation regions. Guar [Cyamopsis tetragonoloba (L.) Taub.] is promising as a crop for producing food‐thickening agents and fluid additives for the oil drilling industry. The effects of irrigation timing, cultivar, and plant population on water use, growth, and yield of guar were investigated at Maricopa, AZ, on a Mohall sandy loam soil (fine‐loamy, mixed, hyperthermic Typic Haplargid) with a water salinity of 1.1 dS m −1 total dissolved salts over a 2‐yr period. Variables were: six irrigation levels (one to four irrigations based on physiological plant growth stages), three cultivars (‘Kinman’, ‘Santa Cruz’, and ‘Lewis’), and three populations (78, 26, and 13 plants m −2 ). Three post‐establishment irrigations—one before flowering, one during initial pod development, and one at mid‐pod filling—were optimal. Four irrigations maximized vegetative growth but reduced seed production per unit of water use; two irrigations lowered growth, seed yield, and water use efficiency. Seed yields averaged 1567, 1650, and 1830 kg ha −1 for Kinman, Santa Cruz, and Lewis, respectively. Seasonal evapotranspiration was 400 mm on the optimal seed production treatments, and water use efficiencies were as high as 0.64 kg seed m −3 in 1983, and 0.41 kg seed m −3 in 1984. The newer Lewis has the potential for higher yields, in addition to being an attractive, low water‐use summer crop for the southwestern United States.
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Claims 9
Claim · model-written summary
Three post-establishment irrigations, before flowering, at initial pod development and at mid-pod filling, were optimal for guar.
- Taxon
- Guar
Cyamopsis tetragonolobat0 - Outcome
- post‐establishment irrigationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e0“Three post‐establishment irrigations—one before flowering, one during initial pod development, and one at mid‐pod filling—were optimal”
Claim · model-written summary
Four irrigations maximized vegetative growth of guar.
- Taxon
- GuarCyamopsis tetragonolobat0
- Treatment
- Four irrigationse1
- Outcome
- vegetative growthe1
- Direction
- maximizede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e1“Four irrigations maximized vegetative growth but reduced seed production per unit of water use”
Claim · model-written summary
Four irrigations reduced seed production per unit of water use.
- Taxon
- GuarCyamopsis tetragonolobat0
- Treatment
- Four irrigationse1
- Outcome
- seed production per unit of water usee1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e1“Four irrigations maximized vegetative growth but reduced seed production per unit of water use”
Claim · model-written summary
Two irrigations lowered growth, seed yield and water use efficiency of guar.
- Taxon
- GuarCyamopsis tetragonolobat0
- Treatment
- two irrigationse2
- Outcome
- growth, seed yield, and water use efficiencye2
- Direction
- lowerede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e2“two irrigations lowered growth, seed yield, and water use efficiency”
Claim · model-written summary
Seed yields averaged 1567, 1650 and 1830 kg/ha for Kinman, Santa Cruz and Lewis.
- Taxon
- GuarCyamopsis tetragonolobat0
- Material
- Kinman, Santa Cruz, and Lewise3
- Outcome
- Seed yieldse3
- Value
- 1567, 1650, and 1830 kg ha −1e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e3“Seed yields averaged 1567, 1650, and 1830 kg ha −1 for Kinman, Santa Cruz, and Lewis, respectively”
Claim · model-written summary
The newer Lewis cultivar has potential for higher guar yields.
- Taxon
- GuarCyamopsis tetragonolobat0
- Material
- Lewise4
- Outcome
- yieldse4
- Direction
- highere4
- Qualifier
- potentiale4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e4“The newer Lewis has the potential for higher yields”
Claim · model-written summary
Seasonal evapotranspiration of guar was 400 mm on the optimal seed production treatments.
- Taxon
- GuarCyamopsis tetragonolobat0
- Outcome
- Seasonal evapotranspiratione5
- Value
- 400 mme5
- Qualifier
- optimal seed production treatmentse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e5“Seasonal evapotranspiration was 400 mm on the optimal seed production treatments”
Claim · model-written summary
Guar water use efficiency reached 0.64 kg seed m−3 in 1983.
- Taxon
- GuarCyamopsis tetragonolobat0
- Outcome
- water use efficienciese6
- Value
- 0.64 kg seed m −3e6
- Qualifier
- in 1983e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e6“water use efficiencies were as high as 0.64 kg seed m −3 in 1983, and 0.41 kg seed m −3 in 1984”
Claim · model-written summary
Guar water use efficiency reached 0.41 kg seed m−3 in 1984.
- Taxon
- GuarCyamopsis tetragonolobat0
- Outcome
- water use efficienciese6
- Value
- 0.41 kg seed m −3e6
- Qualifier
- in 1984e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Irrigation Water Management for Guar Seed Production”
e6“water use efficiencies were as high as 0.64 kg seed m −3 in 1983, and 0.41 kg seed m −3 in 1984”
The same questions in other papers
irrigation · physiology: water · Cyamopsis tetragonoloba (cluster bean)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 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.