Abstract
Abstract Irrigation water quantity and quality limitation is the main problem of agricultural development in the research area (Rafsanjan pistachio orchards in Iran). Optimization of the irrigation system is one of the most important factors to enhance water use efficiency in this region. This research project was designed to compare the applicability of two different types of irrigation, including traditionally used surface irrigation and a simple and relatively cheap subsurface drip irrigation (using a perforated pipe covered with plastic cloth). For this purpose two plots, each containing 39 pistachio trees and 720 m 2 in area, were selected in an orchard and were both irrigated using an exactly equal quantity and quality of water for 3 years. At the end of the second year the yield in the plots was harvested separately and compared. The ratio of the weight of fresh and also dried crop in the subsurface irrigation plot to those of surface irrigation plot was respectively 1.895 and 2 for the second year, and 2.17 and 2.12 for the third year. Another parameter measured for the trees of the two plots was annual shoot growth. The value of the plot growth index (PGI) in the surface irrigation plot was calculated as 2238 cm, whereas in the subsurface irrigation plot it was 4580 cm. In addition, the dried weight of weed grown in the surface irrigation plot was 82 kg but was only 21 kg in the subsurface irrigation plot. These results show the considerable difference in efficiency of the two irrigation systems, and relatively higher preference for a subsurface system over the traditionally used surface method. Copyright © 2008 John Wiley & Sons, Ltd.
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Claims 7
Claim · model-written summary
Fresh pistachio crop weight under subsurface irrigation was 1.895 times surface irrigation in year two.
- Taxon
- pistachio trees
Pistacia verae1 - Treatment
- subsurface irrigation plote0
- Outcome
- weight of freshe0
- Direction
- higherinferrede0
- Value
- 1.895e0
- Comparator
- surface irrigation plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of the weight of fresh and also dried crop in the subsurface irrigation plot to those of surface irrigation plot was respectively 1.895 and 2 for the second year”
e1“pistachio trees”
Claim · model-written summary
Dried pistachio crop weight under subsurface irrigation was twice surface irrigation in year two.
- Taxon
- pistachio treesPistacia verae1
- Treatment
- subsurface irrigation plote0
- Outcome
- dried crope0
- Direction
- higherinferrede0
- Value
- 2e0
- Comparator
- surface irrigation plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of the weight of fresh and also dried crop in the subsurface irrigation plot to those of surface irrigation plot was respectively 1.895 and 2 for the second year”
e1“pistachio trees”
Claim · model-written summary
Fresh pistachio crop weight ratio under subsurface versus surface irrigation was 2.17 in year three.
- Taxon
- pistachio treesPistacia verae1
- Treatment
- subsurface irrigation plote0
- Outcome
- weight of freshe0
- Direction
- higherinferrede0
- Value
- 2.17e0
- Comparator
- surface irrigation plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of the weight of fresh and also dried crop in the subsurface irrigation plot to those of surface irrigation plot was respectively 1.895 and 2 for the second year, and 2.17 and 2.12 for the third year”
e1“pistachio trees”
Claim · model-written summary
Dried pistachio crop weight ratio under subsurface versus surface irrigation was 2.12 in year three.
- Taxon
- pistachio treesPistacia verae1
- Treatment
- subsurface irrigation plote0
- Outcome
- dried crope0
- Direction
- higherinferrede0
- Value
- 2.12e0
- Comparator
- surface irrigation plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ratio of the weight of fresh and also dried crop in the subsurface irrigation plot to those of surface irrigation plot was respectively 1.895 and 2 for the second year, and 2.17 and 2.12 for the third year”
e1“pistachio trees”
Claim · model-written summary
Pistachio plot growth index was 4580 cm with subsurface irrigation versus 2238 cm with surface irrigation.
- Taxon
- pistachio treesPistacia verae1
- Treatment
- subsurface irrigation plote0
- Outcome
- plot growth index (PGI)e0
- Direction
- higherinferrede0
- Value
- 4580 cme0
- Qualifier
- 2238 cme0
- Comparator
- surface irrigation plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The value of the plot growth index (PGI) in the surface irrigation plot was calculated as 2238 cm, whereas in the subsurface irrigation plot it was 4580 cm”
e1“pistachio trees”
Claim · model-written summary
Dry weed weight was 21 kg under subsurface irrigation versus 82 kg under surface irrigation.
- Taxon
- pistachio treesPistacia verae1
- Treatment
- subsurface irrigation plote0
- Interactor
- weede0weed
- Outcome
- dried weight of weede0
- Direction
- onlye0
- Value
- 21 kge0
- Qualifier
- 82 kge0
- Comparator
- surface irrigation plote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dried weight of weed grown in the surface irrigation plot was 82 kg but was only 21 kg in the subsurface irrigation plot”
e1“pistachio trees”
Claim · model-written summary
The authors preferred subsurface over surface irrigation for efficiency.
- Taxon
- pistachio treesPistacia verae1
- Outcome
- preference for a subsurface systeme0
- Comparator
- traditionally used surface methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relatively higher preference for a subsurface system over the traditionally used surface method”
e1“pistachio trees”
The same questions in other papers
irrigation · growth · Pistacia vera (pistachio)Positive and negative results
5 papers in the same direction as this paper · 7 in the opposite direction
- negative
- negative
- no effect
9 papers more in this group
See all 13 papers →irrigation · weed · Pistacia vera (pistachio)Results agree
1 paper in the same direction as this paper
- positive
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.