Abstract
Abstract Plant‐soil responses to mulching with 0.0375 mm thick white‐overblack polyethylene plastic and to two sources of Mg were studied by analyzing soil samples, plant tissues, and yields associated with three crops of irrigated tomatoes ( Lycopersicon esculentum Mill.). These crops were grown on 5.51 m 2 plots of Blanton loamy sand in 1976‐77. Ten and 20 kg/ha of Mg as MgSO 4 · 7H 2 O and 20 kg/ha of Mg as CaMg(CO 3 ) 2 were added each season to mulched and unmulched soil. Yield of marketable tomatoes, S and Mg content of the fourth leaf from tip, and exchangeable Ca, Mg, and buffer pH of soil to a depth of 60‐cm were measured. Yield was significantly increased in the first crop where Mg was added, either as MgSO 4 · 7H 2 O or dolomite on mulched soil. Tomato‐leaf Mg (0.78%) of the second crop was greatest where 20 kg/ha of Mg as MgSO 4 · 7H 2 O was added to the mulched plots although the yield increase was not significant. Leaf Mg content was significantly increased by 20 kg/ha of Mg as MgSO 4 · 7H 2 O in second and third crops whether or not plastic mulch was used. Dolomite increased Mg in the leaf of the third crop. Mulched soil (0 to 15 cm deep) had a higher buffer pH and exchangeable Mg and Ca than did the uncovered soil. No significant difference in cations was noted at greater soil depths.
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Claims 8
Claim · model-written summary
First-crop yield increased with MgSO4 on mulched soil.
- Taxon
- tomatoes
Solanum lycopersicume0e1e2t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was significantly increased in the first crop where Mg was added, either as MgSO 4 · 7H 2 O or dolomite on mulched soil.”
e1“Yield was significantly increased in the first crop where Mg was added, either as MgSO 4 · 7H 2 O or dolomite on mulched soil.”
e2“Yield was significantly increased in the first crop where Mg was added, either as MgSO 4 · 7H 2 O or dolomite on mulched soil.”
t0“Tomatoes”
Claim · model-written summary
First-crop yield increased with dolomite on mulched soil.
- Taxon
- tomatoesSolanum lycopersicume0e1e2t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield was significantly increased in the first crop where Mg was added, either as MgSO 4 · 7H 2 O or dolomite on mulched soil.”
e1“Yield was significantly increased in the first crop where Mg was added, either as MgSO 4 · 7H 2 O or dolomite on mulched soil.”
e2“Yield was significantly increased in the first crop where Mg was added, either as MgSO 4 · 7H 2 O or dolomite on mulched soil.”
t0“Tomatoes”
Claim · model-written summary
Second-crop leaf Mg peaked at 0.78% with 20 kg/ha Mg as magnesium sulfate on mulched plots.
- Taxon
- TomatoSolanum lycopersicume0e1e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tomato‐leaf Mg (0.78%) of the second crop was greatest where 20 kg/ha of Mg as MgSO 4 · 7H 2 O was added to the mulched plots although the yield increase was not significant.”
e1“Tomato‐leaf Mg (0.78%) of the second crop was greatest where 20 kg/ha of Mg as MgSO 4 · 7H 2 O was added to the mulched plots although the yield increase was not significant.”
e2“Tomato‐leaf Mg (0.78%) of the second crop was greatest where 20 kg/ha of Mg as MgSO 4 · 7H 2 O was added to the mulched plots although the yield increase was not significant.”
Claim · model-written summary
The associated second-crop yield increase was not significant.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“although the yield increase was not significant.”
e1“although the yield increase was not significant.”
e2“although the yield increase was not significant.”
t0“Tomatoes”
e3“where 20 kg/ha of Mg as MgSO 4 · 7H 2 O was added to the mulched plots”
Claim · model-written summary
Magnesium sulfate increased leaf Mg in the second and third crops regardless of mulch.
- Taxon
- TomatoesSolanum lycopersicume0e1e2t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf Mg content was significantly increased by 20 kg/ha of Mg as MgSO 4 · 7H 2 O in second and third crops whether or not plastic mulch was used.”
e1“Leaf Mg content was significantly increased by 20 kg/ha of Mg as MgSO 4 · 7H 2 O in second and third crops whether or not plastic mulch was used.”
e2“Leaf Mg content was significantly increased by 20 kg/ha of Mg as MgSO 4 · 7H 2 O in second and third crops whether or not plastic mulch was used.”
t0“Tomatoes”
Claim · model-written summary
Dolomite increased third-crop leaf Mg.
- Taxon
- TomatoesSolanum lycopersicume0e1e2t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dolomite increased Mg in the leaf of the third crop.”
e1“Dolomite increased Mg in the leaf of the third crop.”
e2“Dolomite increased Mg in the leaf of the third crop.”
t0“Tomatoes”
Claim · model-written summary
Mulching raised upper-soil buffer pH and exchangeable Mg and Ca.
- Taxon
- TomatoesSolanum lycopersicume0e1e2t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mulched soil (0 to 15 cm deep) had a higher buffer pH and exchangeable Mg and Ca than did the uncovered soil.”
e1“Mulched soil (0 to 15 cm deep) had a higher buffer pH and exchangeable Mg and Ca than did the uncovered soil.”
e2“Mulched soil (0 to 15 cm deep) had a higher buffer pH and exchangeable Mg and Ca than did the uncovered soil.”
t0“Tomatoes”
Claim · model-written summary
Deeper-soil cations did not differ significantly between mulched and uncovered soil.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant difference in cations was noted at greater soil depths.”
e1“No significant difference in cations was noted at greater soil depths.”
e2“No significant difference in cations was noted at greater soil depths.”
t0“Tomatoes”
e3“Mulched soil (0 to 15 cm deep) had a higher buffer pH and exchangeable Mg and Ca than did the uncovered soil.”
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