Abstract
The judicious use of water for irrigated crop production is an important concern in most arid and semi‐arid areas where water availability is limited. The effects of four irrigation levels on alfalfa ( Medicago sativa L.) hay production (IFN = 1‐00‐078) as measured by: 1) dry matter yield; 2) applied water use efficiency (AWUE); and, 3) forage quality as determined from crude protein (CP), acid detergent fiber (ADF), and total digestible nutrients (TDN) were evaluated. Total applied water during the 1984 growing season was based on 53, 81,102, and 123% of FAO Modified Pan Evaporation (FAOPE) and amounted to 28, 44, 56, and 68 in., respectively. During 1985, applications were 27, 42, 55, and 70 in. based on 48, 75, 100, and 125% of FAOPE. In 1984, irrigation from the 81% FAOPE treatment resulted in the greatest applied water use efficiency, and 102% FAOPE the highest yield and TDN produced per acre. Similar results were obtained in 1985 for the 75 and 100% FAOPE treatments. Alfalfa forage was of higher overall quality (highest CP and TDN concentration, lowest ADF) when irrigated at the lowest irrigation treatment (27–28 in.), but yield levels did not represent an efficient use of water. AWUE decreased and yield, quality, and TDN content were not improved at the highest water treatment (68–70 in.). Applied water based on either 75 to 81% or 100 to 102% FAOPE were considered to represent the most judicious use of water.
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Claims 10
Claim · model-written summary
In 1984, the 81% FAOPE irrigation treatment gave the greatest applied water use efficiency.
- Taxon
- Alfalfa
Medicago sativat0 - Treatment
- 81% FAOPEe0
- Outcome
- applied water use efficiencye0
- Direction
- greateste0
- Qualifier
- In 1984e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e0“In 1984, irrigation from the 81% FAOPE treatment resulted in the greatest applied water use efficiency”
Claim · model-written summary
The 102% FAOPE irrigation treatment gave the highest alfalfa yield and TDN produced per acre.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- 102% FAOPEe1
- Outcome
- yield and TDN produced per acree1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e1“102% FAOPE the highest yield and TDN produced per acre”
Claim · model-written summary
In 1985, the 75 and 100% FAOPE treatments gave similar results.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- 75 and 100% FAOPEe2
- Outcome
- resultse2
- Direction
- Similare2
- Qualifier
- in 1985e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e2“Similar results were obtained in 1985 for the 75 and 100% FAOPE treatments”
Claim · model-written summary
Alfalfa forage quality was higher overall when irrigated at the lowest irrigation treatment.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- lowest irrigation treatment (27–28 in.)e3
- Outcome
- overall qualitye3
- Direction
- highere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e3“Alfalfa forage was of higher overall quality (highest CP and TDN concentration, lowest ADF) when irrigated at the lowest irrigation treatment (27–28 in.)”
Claim · model-written summary
Forage from the lowest irrigation treatment had the highest CP and TDN concentration.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- lowest irrigation treatment (27–28 in.)e3
- Outcome
- CP and TDN concentratione3
- Direction
- higheste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e3“Alfalfa forage was of higher overall quality (highest CP and TDN concentration, lowest ADF) when irrigated at the lowest irrigation treatment (27–28 in.)”
Claim · model-written summary
Forage from the lowest irrigation treatment had the lowest ADF.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- lowest irrigation treatment (27–28 in.)e3
- Outcome
- ADFe3
- Direction
- loweste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e3“Alfalfa forage was of higher overall quality (highest CP and TDN concentration, lowest ADF) when irrigated at the lowest irrigation treatment (27–28 in.)”
Claim · model-written summary
Applied water use efficiency decreased at the highest water treatment (68–70 in.).
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- highest water treatment (68–70 in.)e4
- Outcome
- AWUEe4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e4“AWUE decreased and yield, quality, and TDN content were not improved at the highest water treatment (68–70 in.)”
Claim · model-written summary
Yield, quality and TDN content were not improved at the highest water treatment (68–70 in.).
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- highest water treatment (68–70 in.)e4
- Outcome
- yield, quality, and TDN contente4
- Direction
- not improvede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e4“AWUE decreased and yield, quality, and TDN content were not improved at the highest water treatment (68–70 in.)”
Claim · model-written summary
Yield levels at the lowest irrigation treatment did not represent an efficient use of water.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- lowest irrigation treatment (27–28 in.)e3
- Outcome
- yield levelse5
- Direction
- did not represente5
- Qualifier
- an efficient use of watere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e5“but yield levels did not represent an efficient use of water”
e3“Alfalfa forage was of higher overall quality (highest CP and TDN concentration, lowest ADF) when irrigated at the lowest irrigation treatment (27–28 in.)”
Claim · model-written summary
Applied water based on either 75 to 81% or 100 to 102% FAOPE is considered the most judicious use of water for alfalfa.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- Applied water based on either 75 to 81% or 100 to 102% FAOPEe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Performance of Alfalfa”
e6“Applied water based on either 75 to 81% or 100 to 102% FAOPE were considered to represent the most judicious use of water”
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See all 33 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.