Abstract
Abstract A greenhouse study was conducted to determine the effects of different rates of calcium nitrate, calcium phosphate, ammonium phosphate, and dolomitic limestone on grain sorghum [Sorghum bicolor (L.) Moench] shoot growth, tissue concentration, and total contents in a compacted layer of acid subsoil (pH 4.3) subject to a slit‐till treatment. Cylinders were prepared by layering A and B horizons of a Marvyn loamy sand soil (fine‐loamy, siliceous, thermic, Typic Hapludult) to form 56 cm of subsoil and 10 cm of topsoil in polyvinylchloride (PVC) tubing (20 x 66 cm). A 6‐cm‐thick artificially prepared hardpan with a bulk density of 1.76 Mg m‐3 was created at the top of the subsoil layer. The amendments, 500 μg/g limestone and 15 μg/g for the other amendments, were injected into a 10 x 10 x 0.4‐cm slit. To obtain different concentrations of injected amendments, the amount injected was increased two‐ and threefold. Sorghum shoots were harvested 35 days after emergence and plants allowed to tiller. Shoot dry weight was increased by calcium nitrate and ammonium phosphate amendments, but the dolomitic lime slurry reduced shoot dry weight below the check. Rate of injection did not have any influence on dry weight. Shoot P and Mg concentration was increased by rate of injection while amendments increased K, Mg, and Ca concentration. The total content of shoot followed a similar trend as concentration, but K content was increased at the 2x rate with calcium nitrate.
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Claims 8
Claim · model-written summary
calcium nitrate increased shoot dry weight.
- Taxon
- grain sorghum
Sorghum bicolort0 - Treatment
- calcium nitratee0
- Outcome
- Shoot dry weighte0
- Direction
- increasede0
- Comparator
- checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight was increased by calcium nitrate and ammonium phosphate amendments, but the dolomitic lime slurry reduced shoot dry weight below the check.”
t0“grain sorghum”
Claim · model-written summary
ammonium phosphate increased shoot dry weight.
- Taxon
- grain sorghumSorghum bicolort0
- Treatment
- ammonium phosphatee0
- Outcome
- Shoot dry weighte0
- Direction
- increasede0
- Comparator
- checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight was increased by calcium nitrate and ammonium phosphate amendments, but the dolomitic lime slurry reduced shoot dry weight below the check.”
t0“grain sorghum”
Claim · model-written summary
dolomitic lime slurry reduced shoot dry weight.
- Taxon
- grain sorghumSorghum bicolort0
- Treatment
- dolomitic lime slurrye0
- Outcome
- Shoot dry weighte0
- Direction
- reducede0
- Comparator
- checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight was increased by calcium nitrate and ammonium phosphate amendments, but the dolomitic lime slurry reduced shoot dry weight below the check.”
t0“grain sorghum”
Claim · model-written summary
Injection rate did not influence dry weight.
- Taxon
- grain sorghumSorghum bicolort0
- Treatment
- Rate of injectione0
- Outcome
- dry weighte0
- Direction
- did not have any influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rate of injection did not have any influence on dry weight.”
t0“grain sorghum”
Claim · model-written summary
Higher injection rate increased shoot P and Mg concentrations.
- Taxon
- grain sorghumSorghum bicolort0
- Treatment
- rate of injectione0
- Outcome
- Shoot P and Mg concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot P and Mg concentration was increased by rate of injection while amendments increased K, Mg, and Ca concentration.”
t0“grain sorghum”
Claim · model-written summary
Amendments increased shoot K, Mg and Ca concentrations.
- Taxon
- grain sorghumSorghum bicolort0
- Treatment
- amendmentse0
- Outcome
- K, Mg, and Ca concentratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot P and Mg concentration was increased by rate of injection while amendments increased K, Mg, and Ca concentration.”
t0“grain sorghum”
Claim · model-written summary
Total shoot nutrient content followed a trend similar to concentrations.
- Taxon
- grain sorghumSorghum bicolort0
- Outcome
- total content of shoote0
- Direction
- similar trende0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total content of shoot followed a similar trend as concentration, but K content was increased at the 2x rate with calcium nitrate.”
t0“grain sorghum”
Claim · model-written summary
Calcium nitrate at the 2x rate increased shoot K content.
- Taxon
- grain sorghumSorghum bicolort0
- Treatment
- 2x rate with calcium nitratee0
- Outcome
- K contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total content of shoot followed a similar trend as concentration, but K content was increased at the 2x rate with calcium nitrate.”
t0“grain sorghum”
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See all 41 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.