Abstract
Abstract Trickle irrigation, with its capability of small, frequent irrigation applications, has aroused considerable interest because of possible increased production and decreased water requirements. For this reason, a replicated field investigation was conducted to evaluate quantity and frequency of trickle, modified‐furrow, and standard‐furrow irrigations on the growth of cabbage ( Brassica oleracea capitata ), using a moderately saline water on a fine‐textured soil. Trickle and modified‐furrow irrigations were scheduled to supply various quantities of water based on ratios of the plant's estimated consumptive use at frequencies of 3, 6, and 12 days. The modified furrow was a small furrow constructed in the center of the bed to simulate a field practice comparable to trickle irrigation. The standard‐furrow irrigation was based on plant symptoms and on soil‐moisture depletaion criteria. Consumptive‐use measurements were made by gravimetric soil‐moisture sampling on the standard‐furrow irrigation. Recorded data included yield, quality of production, and water‐use efficiency. Results indicated that the consumptive‐use requirement (38 cm of water in 1972) for high production of cabbage was about the same for all irrigation methods. Maximum production was almost identical for all methods, whereas the application of irrigation water at less than the consumptive‐use rate decreased production for the trickle and modified‐furrow irrigations. Increasing the frequency of trickle irrigations decreased production when the amount of applied irrigation water was near or less than the consumptive‐use rate. Therefore, frequent trickle irrigations may not necessarily be advantageous for cabbage on this soil. Trickle and modified‐furrow irrigation, however, did reduce the irrigation water requirement as compared with the standard‐furrow irrigation, showing that higher irrigation efficiencies can be attained with these new irrigation methods as opposed to conventional methods. Trickle or modified‐furrow irrigation methods have the potential to reduce irrigation water requirements but not consumptive use under many field conditions.
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Claims 8
Claim · model-written summary
High cabbage production required about 38 cm of consumptive water use regardless of irrigation method.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Outcome
- consumptive‐use requiremente0
- Value
- 38 cm of watere0
- Qualifier
- in 1972e0
- Comparator
- all irrigation methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the consumptive‐use requirement (38 cm of water in 1972) for high production of cabbage was about the same for all irrigation methods.”
Claim · model-written summary
Maximum cabbage production was nearly identical across irrigation methods.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- all methodse0
- Outcome
- Maximum productione0
- Direction
- almost identicale0
- Comparator
- all methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum production was almost identical for all methods”
t0“Cabbage Production”
Claim · model-written summary
Water below consumptive use reduced production under trickle irrigation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- tricklee0
- Outcome
- productione0
- Direction
- decreasede0
- Qualifier
- less than the consumptive‐use ratee0
- Comparator
- consumptive‐use ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of irrigation water at less than the consumptive‐use rate decreased production for the trickle and modified‐furrow irrigations.”
t0“Cabbage Production”
Claim · model-written summary
Water below consumptive use reduced production under modified-furrow irrigation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- modified‐furrow irrigationse0
- Outcome
- productione0
- Direction
- decreasede0
- Qualifier
- less than the consumptive‐use ratee0
- Comparator
- consumptive‐use ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of irrigation water at less than the consumptive‐use rate decreased production for the trickle and modified‐furrow irrigations.”
t0“Cabbage Production”
Claim · model-written summary
More frequent trickle irrigation reduced production when water was near or below consumptive use.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Increasing the frequency of trickle irrigationse0
- Outcome
- productione0
- Direction
- decreasede0
- Qualifier
- near or less than the consumptive‐use ratee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the frequency of trickle irrigations decreased production when the amount of applied irrigation water was near or less than the consumptive‐use rate.”
t0“Cabbage Production”
Claim · model-written summary
Trickle irrigation lowered water requirement relative to standard-furrow irrigation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- Tricklee0
- Outcome
- irrigation water requiremente0
- Direction
- reducee0
- Comparator
- standard‐furrow irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trickle and modified‐furrow irrigation, however, did reduce the irrigation water requirement as compared with the standard‐furrow irrigation”
t0“Cabbage Production”
Claim · model-written summary
Modified-furrow irrigation lowered water requirement relative to standard-furrow irrigation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- modified‐furrow irrigatione0
- Outcome
- irrigation water requiremente0
- Direction
- reducee0
- Comparator
- standard‐furrow irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trickle and modified‐furrow irrigation, however, did reduce the irrigation water requirement as compared with the standard‐furrow irrigation”
t0“Cabbage Production”
Claim · model-written summary
Trickle irrigation can reduce irrigation water requirement but not consumptive use.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- irrigation water requirements but not consumptive usee0
- Direction
- reducee0
- Qualifier
- under many field conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Trickle or modified‐furrow irrigation methods have the potential to reduce irrigation water requirements but not consumptive use under many field conditions.”
t0“Cabbage Production”
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