Paper · 1978 · Agronomy Journal

Water and Nutrient Response of Semi‐dwarf Wheat under Improved Management in Pakistan: Agronomic and Economic Implications1

J. B. Eckert; N. M. Chaudhry; S. A. Qureshi

4
claims
8
verbatim quotes
6
citations
2
research areas
—
Not open access

Abstract

Abstract ‘Chenab‐70’ cultivar of semi‐dwarf wheat ( Triticum aestivum L.) was grown under improved management conditions with several levels of N, P and irrigations. An incomplete factorial design included N levels of 0, 56, 112, 168, and 224 kg/ha and 1, 2, 3, 4, 5, and 6 irrigations. Each irrigation consisted of 7.6 cm applied water. Irrigations were optimally sequenced with crop growth stages as indicated by prior research in India and Pakistan. The resulting quadratic production functions indicate that yield levels now obtained by the best farmers can be obtained with one‐third to one‐half of the water currently being applied if irrigations are timed and controlled appropriately. Fertilizer response also exceeded that obtained by progressive farmers. Economically optimum application rates for water and N were rather restrictive with little opportunity for substitution. Finally, soil moisture measurements coupled with concurrent physiological and morphological observations are used to rationalize the persistence of indigenous cultural practices and to suggest new cultural practices to further enhance irrigation efficiency.

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Claims 4

Intervention effectobservedoriginal resultpositivesimulated

Claim · model-written summary

Quadratic production functions indicate that yield levels of the best farmers can be obtained with one-third to one-half of the water currently applied if irrigations are timed and controlled appropriately.

Treatment
irrigations are timed and controlled appropriatelye1
Outcome
yield levelse1
Value
one‐third to one‐halfe1
Comparator
water currently being appliede1

Not reportedDirection

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“wheat ( Triticum aestivum L.) was grown under improved management conditions with several levels of N, P and irrigations”

✓ located verbatim in the source · abstract, characters 44–164 · show in text ↑
e1

“The resulting quadratic production functions indicate that yield levels now obtained by the best farmers can be obtained with one‐third to one‐half of the water currently being applied if irrigations are timed and controlled appropriately”

✓ located verbatim in the source · abstract, characters 453–691 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Fertilizer response of wheat exceeded that obtained by progressive farmers.

Treatment
Fertilizere3
Outcome
Fertilizer responsee3
Direction
exceedede3
Comparator
progressive farmerse3

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“wheat ( Triticum aestivum L.) was grown under improved management conditions with several levels of N, P and irrigations”

✓ located verbatim in the source · abstract, characters 44–164 · show in text ↑
e3

“Fertilizer response also exceeded that obtained by progressive farmers”

✓ located verbatim in the source · abstract, characters 693–763 · show in text ↑
Observationobservedoriginal resultsimulated

Claim · model-written summary

Economically optimum application rates for water and nitrogen in wheat were rather restrictive, with little opportunity for substitution.

Outcome
Economically optimum application rates for water and Ne4
Qualifier
rather restrictive with little opportunity for substitutione4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“wheat ( Triticum aestivum L.) was grown under improved management conditions with several levels of N, P and irrigations”

✓ located verbatim in the source · abstract, characters 44–164 · show in text ↑
e4

“Economically optimum application rates for water and N were rather restrictive with little opportunity for substitution”

✓ located verbatim in the source · abstract, characters 765–884 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

New cultural practices should be suggested to further enhance irrigation efficiency in wheat production.

Outcome
enhance irrigation efficiencye5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Triticum aestivum
Triticum aestivum · TaxonRasbak · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“wheat ( Triticum aestivum L.) was grown under improved management conditions with several levels of N, P and irrigations”

✓ located verbatim in the source · abstract, characters 44–164 · show in text ↑
e5

“to suggest new cultural practices to further enhance irrigation efficiency”

✓ located verbatim in the source · abstract, characters 1068–1142 · show in text ↑

irrigation · yield · Triticum aestivum (wheat)Positive and negative results

989 papers: 798 positive, 191 negative or no effect

797 papers in the same direction as this paper · 184 in the opposite direction · 7 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. negative

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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.