Abstract
`Gala' apple (Malus domestica Borkh) on M.26 rootstock was subjected, in the first five growing seasons, to NP-fertigation and a factorial combination of treatments involving method and frequency of irrigation. Two types of emitters (drip or microjet) were used to apply the same quantity of water at high (daily), intermediate (about weekly) and low (about bi-weekly) irrigation frequencies. Although initial tree vigor and yield were higher for drip-fertigated trees, by the end of the study microjet fertigation produced larger trees of similar yield. These microjet fertigated trees had higher leaf P, K and Cu but lower leaf N, Mg, and Mn than drip-fertigated trees. Soil pH and extractable Mg and K concentrations were higher and extractable-P concentrations lower directly beneath microjet-emitters as a result of the larger fertigated soil volume relative to drip-emitters. High frequency irrigation improved tree growth but had less effect on leaf nutrient concentrations or soil chemical changes than lower frequency irrigation. Leaf N concentration was most affected by irrigation frequency, tending to decrease with daily irrigation.
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Claims 10
Claim · model-written summary
Microjet fertigation produced larger trees than drip fertigation by the end of the study.
- Taxon
- Malus domestica
Malus domesticae0 - Treatment
- microjet fertigatione1
- Outcome
- treese1
- Direction
- largere1
- Comparator
- drip-fertigated treese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e1“Although initial tree vigor and yield were higher for drip-fertigated trees, by the end of the study microjet fertigation produced larger trees of similar yield”
Claim · model-written summary
Microjet fertigation gave yield similar to drip fertigation.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- microjet fertigatione1
- Outcome
- yielde1
- Direction
- similare1
- Comparator
- drip-fertigated treese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e1“Although initial tree vigor and yield were higher for drip-fertigated trees, by the end of the study microjet fertigation produced larger trees of similar yield”
Claim · model-written summary
Initial tree vigor and yield were higher for drip-fertigated trees.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- drip-fertigated treese1
- Outcome
- initial tree vigor and yielde1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e1“Although initial tree vigor and yield were higher for drip-fertigated trees, by the end of the study microjet fertigation produced larger trees of similar yield”
Claim · model-written summary
Microjet fertigated trees had higher leaf P, K and Cu than drip-fertigated trees.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- microjet fertigatede2
- Outcome
- leaf P, K and Cue2
- Direction
- highere2
- Comparator
- drip-fertigated treese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e2“These microjet fertigated trees had higher leaf P, K and Cu but lower leaf N, Mg, and Mn than drip-fertigated trees”
Claim · model-written summary
Microjet fertigated trees had lower leaf N, Mg and Mn than drip-fertigated trees.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- microjet fertigatede2
- Outcome
- leaf N, Mg, and Mne2
- Direction
- lowere2
- Comparator
- drip-fertigated treese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e2“These microjet fertigated trees had higher leaf P, K and Cu but lower leaf N, Mg, and Mn than drip-fertigated trees”
Claim · model-written summary
Under microjet emitters, soil pH and extractable Mg and K concentrations were higher than under drip emitters, owing to the larger fertigated soil volume.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- microjet-emitterse3
- Outcome
- Soil pH and extractable Mg and K concentrationse3
- Direction
- highere3
- Qualifier
- larger fertigated soil volumee3
- Comparator
- drip-emitterse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e3“Soil pH and extractable Mg and K concentrations were higher and extractable-P concentrations lower directly beneath microjet-emitters as a result of the larger fertigated soil volume relative to drip-emitters”
Claim · model-written summary
Under microjet emitters, extractable-P concentrations were lower than under drip emitters.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- microjet-emitterse3
- Outcome
- extractable-P concentrationse3
- Direction
- lowere3
- Comparator
- drip-emitterse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e3“Soil pH and extractable Mg and K concentrations were higher and extractable-P concentrations lower directly beneath microjet-emitters as a result of the larger fertigated soil volume relative to drip-emitters”
Claim · model-written summary
High frequency irrigation improved tree growth compared with lower frequency irrigation.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- High frequency irrigatione4
- Outcome
- tree growthe4
- Direction
- improvede4
- Comparator
- lower frequency irrigatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e4“High frequency irrigation improved tree growth but had less effect on leaf nutrient concentrations or soil chemical changes than lower frequency irrigation”
Claim · model-written summary
High frequency irrigation had less effect on leaf nutrient concentrations or soil chemical changes than lower frequency irrigation.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- High frequency irrigatione4
- Outcome
- leaf nutrient concentrations or soil chemical changese4
- Direction
- less effecte4
- Comparator
- lower frequency irrigatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e4“High frequency irrigation improved tree growth but had less effect on leaf nutrient concentrations or soil chemical changes than lower frequency irrigation”
Claim · model-written summary
Leaf N concentration was most affected by irrigation frequency and tended to decrease with daily irrigation.
- Taxon
- Malus domesticaMalus domesticae0
- Treatment
- daily irrigatione5
- Outcome
- Leaf N concentratione5
- Direction
- decreasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“`Gala' apple (Malus domestica Borkh)”
e5“Leaf N concentration was most affected by irrigation frequency, tending to decrease with daily irrigation”
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- positive
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27 papers in the same direction as this paper · 150 reporting no difference from an alternative
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See all 178 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.