Abstract
SUMMARY Because of shortages of oxen for mouldboard ploughing, delayed planting of maize is common in Mangwende, Zimbabwe and reduces grain yield by 32%. On-farm experiments over four years tested the possibility of using a ripper tine, with atrazine herbicide, to allow smallholders to plant maize earlier. Compared to mouldboard ploughing, tine cultivation increased grain yield at 13 out of 18 sites. All these sites had less than 240 mm of rainfall in January (which coincided with crop anthesis) and long term rainfall records suggest tine cultivation should raise yields in two out of three years. Handweeding and atrazine treatments gave similar grain yields when used with tine cultivation, provided weeds were controlled within 14 days of crop emergence. Tine cultivation was economic at sites where the yield was greater than that with the mouldboard plough. The farmers could manage the combination of tine and atrazine use on a field scale.
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Claims 7
Claim · model-written summary
Delayed planting reduced maize grain yield by 32% in Mangwende, Zimbabwe.
- Treatment
- delayed plantinge0
- Outcome
- grain yielde0
- Direction
- reducese0
- Value
- 32%e0
- Setting
- Mangwende, Zimbabwee0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“delayed planting of maize is common in Mangwende, Zimbabwe and reduces grain yield by 32%.”
Claim · model-written summary
Tine cultivation raised grain yield relative to mouldboard ploughing at 13 of 18 sites.
- Treatment
- tine cultivatione0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 13 out of 18 sitese0
- Comparator
- mouldboard ploughinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to mouldboard ploughing, tine cultivation increased grain yield at 13 out of 18 sites.”
t0“Maize”
Claim · model-written summary
Sites with higher yield under tine cultivation had less than 240 mm of January rainfall.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All these sites had less than 240 mm of rainfall in January (which coincided with crop anthesis)”
t0“Maize”
Claim · model-written summary
Rainfall records suggest tine cultivation should raise yields in two of three years.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“long term rainfall records suggest tine cultivation should raise yields in two out of three years.”
t0“Maize”
Claim · model-written summary
Handweeding and atrazine gave similar grain yields with tine cultivation when weeds were controlled within 14 days of emergence.
- Treatment
- atrazine treatmentse0
- Interactor
- weedse0weed
- Outcome
- grain yieldse0
- Direction
- similare0
- Qualifier
- within 14 days of crop emergencee0
- Comparator
- Handweedinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Handweeding and atrazine treatments gave similar grain yields when used with tine cultivation, provided weeds were controlled within 14 days of crop emergence.”
t0“Maize”
Claim · model-written summary
Tine cultivation was economic where its yield exceeded that of mouldboard ploughing.
- Treatment
- Tine cultivatione0
- Outcome
- economice0
- Qualifier
- yield was greater than that with the mouldboard ploughe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tine cultivation was economic at sites where the yield was greater than that with the mouldboard plough.”
t0“Maize”
Claim · model-written summary
Farmers could manage tine and atrazine together at field scale.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The farmers could manage the combination of tine and atrazine use on a field scale.”
t0“Maize”
The same questions in other papers
atrazine · yield · Zea mays (maize)Results differ
34 papers in the same direction as this paper · 205 in the opposite direction
- positive
- positive
- positive
236 papers more in this group
See all 240 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.