Abstract
Soil and crop management practices suggest the possibility of sulfur deficiency for cole crops in Southern Ontario. A 3-year study was conducted to evaluate rates of calcium and sulfur on yield of `Huron' late-storage cabbage. Treatments were based on CaSO 4 applied at 0, 1000, 2000, and 3000 kg·ha –1 `Novacal' (Ca 27%, S 19%, Mg 2.5%, Dolomex Inc., Portage-du-Fort, Quebec, Canada), a granulated gypsum product. Potassium sulfate and calcium nitrate were used as elemental controls. Potassium and nitrogen levels were balanced with potassium chloride and ammonium nitrate. Phosphorous applications were based on soil analysis. All treatments were applied pre-plant incorporated. This trial was repeated on sand and loam soils typical of soil used for cabbage production in southern Ontario. Applications of sulfur increased yield of cabbage on sand and clay, although the optimum rate varied from year to year. Medium and high rates produced the highest yield in the first year, while low rates were more effective in the second and third seasons. Response of cabbage to calcium varied from year to year. Medium and high rates of calcium increased yield on sand, but had no effect on clay in the first year. Calcium had no effect on yield on either soil type in the second year. However, in the third year, low rates of calcium produced the highest yield on both sand and clay. Although there were no visual symptoms of deficiency, applications of sulfur, and to a lesser extent calcium, increased yield indicating that a `hidden hunger' for these elements may exist on some soils in southern Ontario.
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Claims 7
Claim · model-written summary
Sulfur applications increased cabbage yield on sand and clay, although the optimum rate varied from year to year.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- Applications of sulfure1
- Outcome
- yielde1
- Direction
- increasede1
- Qualifier
- optimum rate varied from year to yeare1
- Setting
- sand and claye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of `Huron' late-storage cabbage”
e1“Applications of sulfur increased yield of cabbage on sand and clay, although the optimum rate varied from year to year”
Claim · model-written summary
Medium and high sulfur rates gave the highest cabbage yield in the first year.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- Medium and high ratese2
- Outcome
- yielde2
- Direction
- higheste2
- Qualifier
- first yeare2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of `Huron' late-storage cabbage”
e2“Medium and high rates produced the highest yield in the first year, while low rates were more effective in the second and third seasons”
Claim · model-written summary
Low sulfur rates were more effective for cabbage yield in the second and third seasons.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- low ratese2
- Outcome
- yielde2
- Direction
- more effectivee2
- Qualifier
- second and third seasonse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of `Huron' late-storage cabbage”
e2“Medium and high rates produced the highest yield in the first year, while low rates were more effective in the second and third seasons”
Claim · model-written summary
Medium and high calcium rates increased cabbage yield on sand in the first year.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- Medium and high rates of calciume3
- Outcome
- yielde3
- Direction
- increasede3
- Qualifier
- first yeare3
- Setting
- sande3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of `Huron' late-storage cabbage”
e3“Medium and high rates of calcium increased yield on sand, but had no effect on clay in the first year”
Claim · model-written summary
Medium and high calcium rates had no effect on cabbage yield on clay in the first year.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- Medium and high rates of calciume3
- Outcome
- yielde3
- Direction
- no effecte3
- Qualifier
- first yeare3
- Setting
- claye3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of `Huron' late-storage cabbage”
e3“Medium and high rates of calcium increased yield on sand, but had no effect on clay in the first year”
Claim · model-written summary
Calcium had no effect on cabbage yield on either soil type in the second year.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- Calciume4
- Outcome
- yielde4
- Direction
- no effecte4
- Qualifier
- second yeare4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of `Huron' late-storage cabbage”
e4“Calcium had no effect on yield on either soil type in the second year”
Claim · model-written summary
Low calcium rates gave the highest cabbage yield on both sand and clay in the third year.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- low rates of calciume5
- Outcome
- yielde5
- Direction
- higheste5
- Qualifier
- third yeare5
- Setting
- both sand and claye5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yield of `Huron' late-storage cabbage”
e5“in the third year, low rates of calcium produced the highest yield on both sand and clay”
The same questions in other papers
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- negative
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- no effect
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10 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
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See all 13 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.