Abstract
The recent introduction of nutrient management legislation in Ontario may force vegetable growers to reduce nitrogen (N) application. Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage. Nitrogen application rates of 0, 85, 170, 255, and 340 kg ha-1 were applied 75% preplant and 25% sidedress to Atlantis, a mid-season cultivar. Total yield, marketable yield, weight per head, head density, and head size were assessed at harvest. In 2001, total yield showed a peak at 265 kg N ha-1 while in 2001 no significant effect was recorded. Head size and weight per head increased with increasing N rate only in 2000, reflecting differences in yield. Cabbage density was generally unaffected by N rate. Days to maturity decreased with increasing N rate reaching a minimum at 245 and 226 kg ha-1 in 2000 and 2001, respectively. Nitrogen rates above current recommended levels are beneficial in maximizing cabbage yields in wet years and minimizing days to maturity.
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Claims 8
Claim · model-written summary
In 2001, total yield peaked at 265 kg N ha-1.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Material
- Atlantise2
- Treatment
- Nitrogen applicatione2
- Outcome
- total yielde1
- Direction
- peake1
- Value
- 265 kg N ha-1e1
- Setting
- Simcoe, Ontarioe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e1“In 2001, total yield showed a peak at 265 kg N ha-1”
e2“Nitrogen application rates of 0, 85, 170, 255, and 340 kg ha-1 were applied 75% preplant and 25% sidedress to Atlantis, a mid-season cultivar”
Claim · model-written summary
Total yield showed no significant effect of N rate in one of the two years (the abstract labels both years 2001).
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- Nitrogen applicatione2
- Outcome
- total yielde1
- Direction
- no significant effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e1“In 2001, total yield showed a peak at 265 kg N ha-1”
e2“Nitrogen application rates of 0, 85, 170, 255, and 340 kg ha-1 were applied 75% preplant and 25% sidedress to Atlantis, a mid-season cultivar”
e3“while in 2001 no significant effect was recorded”
Claim · model-written summary
Head size and weight per head increased with increasing N rate, only in 2000.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- increasing N ratee4
- Outcome
- Head size and weight per heade4
- Direction
- increasede4
- Qualifier
- only in 2000e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e4“Head size and weight per head increased with increasing N rate only in 2000, reflecting differences in yield”
Claim · model-written summary
Cabbage density was generally unaffected by N rate.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- N ratee5
- Outcome
- Cabbage densitye5
- Direction
- unaffectede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e5“Cabbage density was generally unaffected by N rate”
Claim · model-written summary
Days to maturity decreased with increasing N rate.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- increasing N ratee6
- Outcome
- Days to maturitye6
- Direction
- decreasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e6“Days to maturity decreased with increasing N rate reaching a minimum at 245 and 226 kg ha-1 in 2000 and 2001, respectively”
e7“Nitrogen rates above current recommended levels are beneficial in maximizing cabbage yields in wet years and minimizing days to maturity”
Claim · model-written summary
Days to maturity reached a minimum at 245 kg ha-1 in 2000 and 226 kg ha-1 in 2001.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Outcome
- Days to maturitye6
- Value
- 245 and 226 kg ha-1e6
- Qualifier
- in 2000 and 2001, respectivelye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e6“Days to maturity decreased with increasing N rate reaching a minimum at 245 and 226 kg ha-1 in 2000 and 2001, respectively”
Claim · model-written summary
Nitrogen rates above current recommended levels are beneficial for maximizing cabbage yields in wet years.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- Nitrogen rates above current recommended levelse7
- Outcome
- maximizing cabbage yieldse7
- Qualifier
- in wet yearse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e7“Nitrogen rates above current recommended levels are beneficial in maximizing cabbage yields in wet years and minimizing days to maturity”
Claim · model-written summary
Nitrogen rates above current recommended levels are beneficial for minimizing days to maturity.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- Nitrogen rates above current recommended levelse7
- Outcome
- minimizing days to maturitye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments were conducted on mineral soil in Simcoe, Ontario in 2000 and 2001 to re-evaluate the N needs of cabbage”
e7“Nitrogen rates above current recommended levels are beneficial in maximizing cabbage yields in wet years and minimizing days to maturity”
The same questions in other papers
nitrogen · yield · Brassica oleracea (wild cabbage)Results differ
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See all 15 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.