Abstract
Abstract Large areas of the world consist of marginal desert soils. Introducing these soils to agricultural production requires development of new irrigation and fertilization techniques. This study was conducted to test the hypothesis that such soils can be used provided one can control soil water content and nutrient concentration of the soil solution in the root zone by supplying nutrients daily through a trickle irrigation system. Six fertilizer combinations at two irrigation levels were tested on a tomato crop of a determinate type of growth ( Lycopersicum esculantum var. S‐5), grown on a virgin desert soil containing 85% calcium carbonate and EC of 7 mmho/cm. The highest yield, 80 tons/ha, was obtained with 400 mm water (40% of evaporation from a Class A pan) plus KNO 3 , superphosphate, and KH 2 PO 4 fertilizers. In the root volume of this treatment the nitrate concentration in the soil solution was about 160 ± 30 ppm NO 3 ‐N throughout the season. A total soil water potential of about −2 to −4 bars during the first month of growth resulted in a lower canopy yield but earlier fruit ripening as compared with total water potential of −1 to −2 bars.
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Claims 4
Claim · model-written summary
The 400 mm water treatment with fertilizers gave the highest tomato yield, 80 tons/ha.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- 400 mm watere1
- Outcome
- yielde1
- Direction
- higheste1
- Value
- 80 tons/hae1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested on a tomato crop of a determinate type of growth”
e1“The highest yield, 80 tons/ha, was obtained with 400 mm water”
Claim · model-written summary
Nitrate concentration in the soil solution in the root volume was about 160 ± 30 ppm.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- nitrate concentration in the soil solutione2
- Value
- 160 ± 30 ppme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested on a tomato crop of a determinate type of growth”
e2“the nitrate concentration in the soil solution was about 160 ± 30 ppm”
Claim · model-written summary
Total soil water potential of about −2 to −4 bars in the first month gave a lower canopy yield than −1 to −2 bars.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- total soil water potential of about −2 to −4 barse3
- Outcome
- canopy yielde3
- Direction
- lowere3
- Comparator
- total water potential of −1 to −2 barse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested on a tomato crop of a determinate type of growth”
e3“A total soil water potential of about −2 to −4 bars during the first month of growth resulted in a lower canopy yield but earlier fruit ripening as compared with total water potential of −1 to −2 bars”
Claim · model-written summary
Total soil water potential of about −2 to −4 bars in the first month gave earlier fruit ripening than −1 to −2 bars.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- total soil water potential of about −2 to −4 barse3
- Outcome
- fruit ripeninge3
- Direction
- earliere3
- Comparator
- total water potential of −1 to −2 barse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tested on a tomato crop of a determinate type of growth”
e3“A total soil water potential of about −2 to −4 bars during the first month of growth resulted in a lower canopy yield but earlier fruit ripening as compared with total water potential of −1 to −2 bars”
The same questions in other papers
soil water · yield · Solanum lycopersicum (tomato)Results differ
7 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 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.