Abstract
In a soil incubation experiment with different rates of Zn, the amounts of Zn extracted with 0.005 M DTPA, 1 M MgCl 2 , and 0.01 M CaCl 2 increased with an increase in the organic matter content of a neutral sandy loam soil and with alfalfa added as an organic amendment. Addition of muck and peat increased the amount of Zn exchanged with 1 M MgCl 2 but decreased the amount soluble in 0.01 M CaCl 2 , whereas addition of clay increased the amount of exchangeable Zn but decreased the amounts in the DTPA and 0.01 M CaCl 2 extracts. Liming of an acid sandy loam soil (pH 4.9) to about the neutral point reduced the amounts of extractable Zn markedly. A pretreatment of the soils with phosphate almost invariably increased the amounts of extractable Zn. In a corresponding pot experiment, the highest rate of Zn (250 ppm) reduced the yield of corn slightly, prevented the growth of lettuce, and reduced the yield of alfalfa markedly when these crops were grown successively in the acid soil. The concentration of Zn reached levels of 792 ppm in the corn and 702 ppm in the alfalfa. Addition of 50 ppm Zn to the acid soil restricted the growth of lettuce and increased the concentration of Zn to 523 ppm. Despite discrepancies, the concentrations of Zn in the plants as influenced by soil organic matter, organic amendments and liming were usually in accord with the amounts of Zn extracted from the soils. But the P pretreatment tended to decrease the concentration of Zn in corn and lettuce. The mean weight concentrations of Zn in the three species were correlated significantly with the amounts of Zn extracted with 0.005 M DTPA (r = +0.73), 1 M MgCl 2 (r = +0.93) and 0.01 M CaCl 2 (r = +0.90).
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Claims 19
Claim · model-written summary
In a pot experiment the highest Zn rate (250 ppm) slightly reduced corn yield.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- the highest rate of Zn (250 ppm)e0
- Outcome
- yielde0
- Direction
- reducede0
- Qualifier
- slightlye0
- Setting
- pot experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a corresponding pot experiment, the highest rate of Zn (250 ppm) reduced the yield of corn slightly”
Claim · model-written summary
The highest Zn rate (250 ppm) prevented the growth of lettuce in the pot experiment.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- the highest rate of Zn (250 ppm)e0
- Outcome
- growth of lettucee0
- Direction
- preventede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest rate of Zn (250 ppm) reduced the yield of corn slightly, prevented the growth of lettuce”
Claim · model-written summary
The highest Zn rate (250 ppm) markedly reduced alfalfa yield in the pot experiment.
- Taxon
- alfalfa
Medicago sativae0 - Treatment
- the highest rate of Zn (250 ppm)e0
- Outcome
- yield of alfalfae0
- Direction
- reducede0
- Qualifier
- markedlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest rate of Zn (250 ppm) reduced the yield of corn slightly, prevented the growth of lettuce, and reduced the yield of alfalfa markedly”
Claim · model-written summary
Zn concentration in corn reached 792 ppm.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- concentration of Zne0
- Value
- 792 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of Zn reached levels of 792 ppm in the corn and 702 ppm in the alfalfa”
Claim · model-written summary
Zn concentration in alfalfa reached 702 ppm.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- concentration of Zne0
- Value
- 702 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of Zn reached levels of 792 ppm in the corn and 702 ppm in the alfalfa”
Claim · model-written summary
Addition of 50 ppm Zn to the acid soil restricted the growth of lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Addition of 50 ppm Zn to the acid soile0
- Outcome
- growth of lettucee0
- Direction
- restrictede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of 50 ppm Zn to the acid soil restricted the growth of lettuce and increased the concentration of Zn to 523 ppm”
Claim · model-written summary
Addition of 50 ppm Zn to the acid soil increased the Zn concentration in lettuce to 523 ppm.
- Taxon
- lettuceLactuca sativae0
- Treatment
- Addition of 50 ppm Zn to the acid soile0
- Outcome
- concentration of Zne0
- Direction
- increasede0
- Value
- 523 ppme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of 50 ppm Zn to the acid soil restricted the growth of lettuce and increased the concentration of Zn to 523 ppm”
Claim · model-written summary
Zn concentrations in plants, as influenced by soil organic matter, organic amendments and liming, were usually in accord with the amounts of Zn extracted from the soils.
- Taxon
- plantsViridiplantaee0
- Treatment
- soil organic matter, organic amendments and liminge0
- Outcome
- concentrations of Zne0
Not reportedDirection
Verbatim
e0“the concentrations of Zn in the plants as influenced by soil organic matter, organic amendments and liming were usually in accord with the amounts of Zn extracted from the soils”
Claim · model-written summary
P pretreatment of the soils tended to decrease the Zn concentration in corn.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- P pretreatmente0
- Outcome
- concentration of Zne0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the P pretreatment tended to decrease the concentration of Zn in corn and lettuce”
Claim · model-written summary
P pretreatment of the soils tended to decrease the Zn concentration in lettuce.
- Taxon
- lettuceLactuca sativae0
- Treatment
- P pretreatmente0
- Outcome
- concentration of Zne0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the P pretreatment tended to decrease the concentration of Zn in corn and lettuce”
Claim · model-written summary
Mean weight concentrations of Zn in the three species correlated significantly and positively with Zn extracted with 0.005 M DTPA (r = +0.73).
Verbatim
e0“The mean weight concentrations of Zn in the three species were correlated significantly with the amounts of Zn extracted with 0.005 M DTPA (r = +0.73)”
Claim · model-written summary
Mean weight concentrations of Zn in the three species correlated significantly and positively with Zn extracted with 1 M MgCl2 (r = +0.93).
Verbatim
e0“The mean weight concentrations of Zn in the three species were correlated significantly with the amounts of Zn extracted with 0.005 M DTPA (r = +0.73), 1 M MgCl 2 (r = +0.93)”
Claim · model-written summary
Mean weight concentrations of Zn in the three species correlated significantly and positively with Zn extracted with 0.01 M CaCl2 (r = +0.90).
Verbatim
e0“The mean weight concentrations of Zn in the three species were correlated significantly with the amounts of Zn extracted with 0.005 M DTPA (r = +0.73), 1 M MgCl 2 (r = +0.93) and 0.01 M CaCl 2 (r = +0.90)”
Claim · model-written summary
Zn extracted with DTPA, MgCl2 and CaCl2 increased with soil organic matter content in a neutral sandy loam.
Not reportedTaxon
Verbatim
e0“the amounts of Zn extracted with 0.005 M DTPA, 1 M MgCl 2 , and 0.01 M CaCl 2 increased with an increase in the organic matter content of a neutral sandy loam soil”
Claim · model-written summary
Zn extracted with DTPA, MgCl2 and CaCl2 increased with alfalfa added as an organic amendment.
- Treatment
- alfalfa added as an organic amendmente0
- Outcome
- amounts of Zn extractede0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“the amounts of Zn extracted with 0.005 M DTPA, 1 M MgCl 2 , and 0.01 M CaCl 2 increased with an increase in the organic matter content of a neutral sandy loam soil and with alfalfa added as an organic amendment”
Claim · model-written summary
Addition of muck and peat increased MgCl2-exchangeable Zn but decreased CaCl2-soluble Zn.
- Treatment
- Addition of muck and peate0
- Outcome
- amount of Zn exchanged with 1 M MgCl 2e0
- Direction
- increasede0
- Qualifier
- decreased the amount soluble in 0.01 M CaCl 2e0
Not reportedTaxonComparator
Verbatim
e0“Addition of muck and peat increased the amount of Zn exchanged with 1 M MgCl 2 but decreased the amount soluble in 0.01 M CaCl 2”
Claim · model-written summary
Addition of clay increased exchangeable Zn but decreased Zn in the DTPA and CaCl2 extracts.
- Treatment
- addition of claye0
- Outcome
- amount of exchangeable Zne0
- Direction
- increasede0
- Qualifier
- decreased the amounts in the DTPA and 0.01 M CaCl 2 extractse0
Not reportedTaxonComparator
Verbatim
e0“addition of clay increased the amount of exchangeable Zn but decreased the amounts in the DTPA and 0.01 M CaCl 2 extracts”
Claim · model-written summary
Liming an acid sandy loam soil (pH 4.9) to about neutral markedly reduced extractable Zn.
- Treatment
- Liming of an acid sandy loam soil (pH 4.9) to about the neutral pointe0
- Outcome
- amounts of extractable Zne0
- Direction
- reducede0
- Qualifier
- markedlye0
Not reportedTaxonComparator
Verbatim
e0“Liming of an acid sandy loam soil (pH 4.9) to about the neutral point reduced the amounts of extractable Zn markedly”
Claim · model-written summary
Pretreating the soils with phosphate almost invariably increased extractable Zn.
- Treatment
- pretreatment of the soils with phosphatee0
- Outcome
- amounts of extractable Zne0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“A pretreatment of the soils with phosphate almost invariably increased the amounts of extractable Zn”
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