Abstract
Conservation tillage systems offer distinct advantages for crop production under erosive and droughty soil conditions. This report contains 4 years of data on the effects of in situ cereal rye and wheat mulches on yield of cabbage (Brassica oleracea L. var. capitata) grown under limited-irrigation, conservation-tillage systems. Three tillage systems were studied: conventional plow-disk (CT); strip tillage (ST) and no-tillage (NT). The summers of 1987 and 1990 were characterized by below-average total rain and periods of prolonged (45 days) of dry weather during head enlargement; cabbage yields were highest in the mulched ST and NT plots. In contrast, the 1988 and 1989 growing seasons were above average in total rain and there were no prolonged periods of dry weather. Cabbage yields were unaffected by tillage treatments in 1988, while, in 1989, yields with NT were 65% and 60% lower than with CT and ST, respectively. A combination of abundant rain, soil compaction, and delayed planting retarded plant growth in the 1989 NT plots, resulting in smaller, less-productive plants than in the tilled ST and CT plots. These data show that: 1) conservation tillage and particularly strip tillage systems are viable options for production of cabbage; and 2) rain-irrigation patterns, site selection, and planting dates are major determinants of the relative advantages of conservation tillage compared to conventional tillage systems.
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Claims 8
Claim · model-written summary
In dry 1987 and 1990 seasons, cabbage yield was highest in mulched strip and no-tillage plots.
- Taxon
- cabbage
Brassica oleracea var. capitatae0 - Treatment
- mulched ST and NT plotse0
- Outcome
- cabbage yieldse0
- Direction
- higheste0
- Qualifier
- 1987 and 1990e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The summers of 1987 and 1990 were characterized by below-average total rain and periods of prolonged (45 days) of dry weather during head enlargement; cabbage yields were highest in the mulched ST and NT plots”
Claim · model-written summary
Tillage treatments did not affect cabbage yield in 1988.
- Taxon
- CabbageBrassica oleracea var. capitatae0
- Treatment
- tillage treatmentse0
- Outcome
- Cabbage yieldse0
- Direction
- unaffectede0
- Qualifier
- 1988e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cabbage yields were unaffected by tillage treatments in 1988”
Claim · model-written summary
In 1989 no-tillage cabbage yield was 65% below conventional tillage.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- NTe0
- Outcome
- yieldse0
- Direction
- lowere0
- Value
- 65%e0
- Qualifier
- 1989e0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 1989, yields with NT were 65% and 60% lower than with CT and ST, respectively”
t0“cabbage (Brassica oleracea L. var. capitata)”
Claim · model-written summary
In 1989 no-tillage cabbage yield was 60% below strip tillage.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- NTe0
- Outcome
- yieldse0
- Direction
- lowere0
- Value
- 60%e0
- Qualifier
- 1989e0
- Comparator
- STe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 1989, yields with NT were 65% and 60% lower than with CT and ST, respectively”
t0“cabbage (Brassica oleracea L. var. capitata)”
Claim · model-written summary
Rain, compaction and delayed planting retarded growth in 1989 no-tillage cabbage plots.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- NTe0
- Outcome
- plant growthe0
- Direction
- retardede0
- Qualifier
- abundant rain, soil compaction, and delayed plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A combination of abundant rain, soil compaction, and delayed planting retarded plant growth in the 1989 NT plots”
t0“cabbage (Brassica oleracea L. var. capitata)”
Claim · model-written summary
Plants in 1989 no-tillage plots were smaller and less productive than those in tilled plots.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- smaller, less-productive plantse0
- Direction
- smallere0
- Comparator
- tilled ST and CT plotse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resulting in smaller, less-productive plants than in the tilled ST and CT plots”
t0“cabbage (Brassica oleracea L. var. capitata)”
Claim · model-written summary
Conservation tillage, especially strip tillage, was judged viable for cabbage production.
- Taxon
- cabbageBrassica oleracea var. capitatae0
- Treatment
- strip tillage systemse0
- Outcome
- viable options for production of cabbagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“conservation tillage and particularly strip tillage systems are viable options for production of cabbage”
Claim · model-written summary
Rain-irrigation patterns, site and planting dates determine relative tillage advantages.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Outcome
- relative advantages of conservation tillagee0
- Qualifier
- rain-irrigation patterns, site selection, and planting datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rain-irrigation patterns, site selection, and planting dates are major determinants of the relative advantages of conservation tillage compared to conventional tillage systems”
t0“cabbage (Brassica oleracea L. var. capitata)”
The same questions in other papers
mulching · yield · Brassica oleracea (wild cabbage)Results differ
48 papers in the same direction as this paper · 10 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- negative
- no effect
57 papers more in this group
See all 61 papers →tillage · yield · Brassica oleracea (wild cabbage)Positive and negative results
16 papers in the same direction as this paper · 12 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- negative
28 papers more in this group
See all 32 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.