Abstract
The effect of four tillage systems on grain yield of maize, incidence of diseases and production costs was investigated for a Hutton soil in the Natal Midlands from 1982 to 1995. The four tillage systems were no-till (NT), reduced tillage (R, T and R2 T) and conventional tillage (CT). Mean grain yields were not significantly affected by tillage system. Compared with the other systems, NT negatively affected final plant densities, by about 2000 plants ha1. The incidence of ear rot caused by Stenocarpella spp. was not significantly affected by tillage systems, although NT resulted in reduced ear rot incidence in seven out of 13 years. Spraying fungicide for control of grey leaf spot (Cercospora zeae-maydis) improved yields over 100% for NT and in reduced tillage systems during a wet season, compared to 80% increase with CT. During a drier season spraying had no significant effect on grey leaf spot. In the long term, NT was economically more profitable and less risky than the CT system.
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Claims 7
Claim · model-written summary
Mean maize grain yields were not significantly affected by tillage system.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Mean grain yields were not significantly affected by tillage system”
Claim · model-written summary
No-till reduced final plant density by about 2000 plants per hectare relative to the other tillage systems.
- Treatment
- NTe0
- Outcome
- final plant densitiese0
- Direction
- negatively affectede0
- Value
- about 2000 plants ha1e0
- Comparator
- the other systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Compared with the other systems, NT negatively affected final plant densities, by about 2000 plants ha1”
Claim · model-written summary
Incidence of ear rot caused by Stenocarpella spp. was not significantly affected by tillage system.
- Treatment
- tillage systemse0
- Interactor
- Stenocarpella spp.
Stenocarpellae0pathogen - Outcome
- incidence of ear rote0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“The incidence of ear rot caused by Stenocarpella spp. was not significantly affected by tillage systems”
Claim · model-written summary
No-till resulted in reduced ear rot incidence in seven of 13 years.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“NT resulted in reduced ear rot incidence in seven out of 13 years”
Claim · model-written summary
Fungicide spraying against grey leaf spot raised yields by over 100% under no-till and reduced tillage in a wet season, versus an 80% increase under conventional tillage.
- Treatment
- Spraying fungicidee0
- Interactor
- Cercospora zeae-maydis
Cercospora zeae-maydise0pathogen - Outcome
- yieldse0
- Direction
- improvede0
- Value
- over 100%e0
- Qualifier
- during a wet seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“Spraying fungicide for control of grey leaf spot (Cercospora zeae-maydis) improved yields over 100% for NT and in reduced tillage systems during a wet season, compared to 80% increase with CT”
Claim · model-written summary
In a drier season fungicide spraying had no significant effect on grey leaf spot.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“During a drier season spraying had no significant effect on grey leaf spot”
Claim · model-written summary
In the long term no-till was economically more profitable and less risky than conventional tillage.
- Treatment
- NTe0
- Outcome
- economically more profitable and less riskye0
- Direction
- more profitablee0
- Comparator
- CT systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e0“In the long term, NT was economically more profitable and less risky than the CT system”
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tillage · Stenocarpella · Zea mays (maize)Positive and negative results
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See all 1,099 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.