Abstract
A one-year field study was conducted at the Maricopa Agricultural Center in the winter and spring of 1991-92 with the purpose of comparing the response of leaf lettuce grown with subsurface drip irrigation to various broadcast and banded phosphorus (P) fertilizer applications and rates. Two rates of banded treble superphosphate, 250 lbs. (1X) and 125 lbs. (1/2X) of P2Osper acre, were applied immediately before planting in a concentrated strip 1 inch directly below the row to be seeded. One broadcast rate, 250 lbs. (1X) of P205 per acre of the same material, was applied and folded into the planting beds during listing. Control plots, in which zero P fertilizer was applied, were also maintained. Whole plant total P concentrations were higher in the first one-third of the growing season for the band treatments, though the differences in responses between band and broadcast applications were not statistically significant in the final third of the season. The 1X band treatment exhibited both greater plant heights and diameters than all other treatments during the first one-half of the growing season, and maintained greater height dimensions in the second half. The 1X broadcast and 1/2X band treatments exhibited similar growth throughout the season. By harvest there were not significant differences in head or plant size or in marketable yield among the three P treatments.
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Claims 6
Claim · model-written summary
Whole plant total P concentrations were higher in the first one-third of the season for band than for broadcast P applications.
Verbatim
e1“comparing the response of leaf lettuce grown with subsurface drip irrigation”
e2“Whole plant total P concentrations were higher in the first one-third of the growing season for the band treatments, though the differences in responses between band and broadcast applications were not statistically significant in the final third of the season”
e3“A one-year field study was conducted at the Maricopa Agricultural Center in the winter and spring of 1991-92”
Claim · model-written summary
Differences in responses between band and broadcast P applications were not significant in the final third of the season.
Verbatim
e1“comparing the response of leaf lettuce grown with subsurface drip irrigation”
e2“Whole plant total P concentrations were higher in the first one-third of the growing season for the band treatments, though the differences in responses between band and broadcast applications were not statistically significant in the final third of the season”
Claim · model-written summary
The 1X band treatment gave greater plant heights and diameters than all other treatments during the first half of the season.
Verbatim
e1“comparing the response of leaf lettuce grown with subsurface drip irrigation”
e2“The 1X band treatment exhibited both greater plant heights and diameters than all other treatments during the first one-half of the growing season, and maintained greater height dimensions in the second half”
Claim · model-written summary
The 1X band treatment maintained greater plant height in the second half of the season than all other treatments.
Verbatim
e1“comparing the response of leaf lettuce grown with subsurface drip irrigation”
e2“The 1X band treatment exhibited both greater plant heights and diameters than all other treatments during the first one-half of the growing season, and maintained greater height dimensions in the second half”
Claim · model-written summary
The 1X broadcast and 1/2X band treatments gave similar growth throughout the season.
Verbatim
e1“comparing the response of leaf lettuce grown with subsurface drip irrigation”
e2“The 1X broadcast and 1/2X band treatments exhibited similar growth throughout the season”
Claim · model-written summary
The three P treatments did not differ significantly in head or plant size or in marketable yield at harvest.
- Taxon
- leaf lettucee1
- Treatment
- three P treatmentse2
- Outcome
- head or plant size or in marketable yielde2
- Direction
- no_changeinferrede2
- Qualifier
- By harveste2
Not reportedComparator
Verbatim
e1“comparing the response of leaf lettuce grown with subsurface drip irrigation”
e2“By harvest there were not significant differences in head or plant size or in marketable yield among the three P treatments”
The same questions in other papers
transplanting · growth · Lactuca sativa (garden lettuce)Positive and negative results
3 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 papers →phosphorus · quality: postharvest · Lactuca sativa (garden lettuce)Results agree
1 paper in the same direction as this paper
- negative
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.