Abstract
The effects of early ploughing (before the start of the dry season) and late ploughing on the grain and DM yields of a forage maize and cold-tolerant forage and grain sorghum crops are reported. It appeared that on a shallow soil no significant effects on crop production could be shown, but on a deep soil with good water-holding capacity, crop yields were increased considerably by reducing soil moisture evaporation in the dry period prior to the growing season. In DM yield forage sorghum outyielded maize, a difference which was accentuated when mechanized harvesting systems were used in lodged crops. Forage sorghum proved to be more lodging-resistant than maize but, even when lodged, was harvestable without too much difficulty. The use of small-plot maize yield trials is considered to have limited applicability to mechanized harvesting systems when presently available Kenyan maize hybrids are used. Lodging was the major limiting field factor for the harvesting of heavy maize crops. The highest net yields recorded for maize and sorghum were 12.0 and 23.7 t DM/ha, resp. The higher yield of sorghum was probably not due to better drought resistance but to lower lodging susceptibility and a longer growing period. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 11
Claim · model-written summary
Early versus late ploughing showed no significant crop production effect on shallow soil.
Sorghum
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on a shallow soil no significant effects on crop production could be shown”
t0“sorghum and maize”
t1“early ploughing (before the start of the dry season) and late ploughing”
Claim · model-written summary
Reducing soil moisture evaporation considerably increased crop yields on deep soil.
- Treatment
- reducing soil moisture evaporatione0
- Outcome
- crop yieldse0
- Direction
- increasede0
- Setting
- deep soil with good water-holding capacitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on a deep soil with good water-holding capacity, crop yields were increased considerably by reducing soil moisture evaporation in the dry period prior to the growing season”
t0“sorghum and maize”
Claim · model-written summary
Forage sorghum exceeded maize in dry matter yield.
Verbatim
e0“In DM yield forage sorghum outyielded maize”
Claim · model-written summary
The sorghum dry matter yield advantage was accentuated with mechanized harvesting of lodged crops.
- Outcome
- differencee0
- Direction
- accentuatede0
- Qualifier
- when mechanized harvesting systems were used in lodged cropse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a difference which was accentuated when mechanized harvesting systems were used in lodged crops”
t0“sorghum”
Claim · model-written summary
Forage sorghum was more resistant to lodging than maize.
Verbatim
e0“Forage sorghum proved to be more lodging-resistant than maize”
Claim · model-written summary
Lodged forage sorghum remained harvestable without much difficulty.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“even when lodged, was harvestable without too much difficulty”
t0“sorghum”
Claim · model-written summary
Lodging was the main field limitation on harvesting heavy maize crops.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lodging was the major limiting field factor for the harvesting of heavy maize crops”
Claim · model-written summary
The highest recorded net maize yield was 12.0 t DM/ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest net yields recorded for maize and sorghum were 12.0 and 23.7 t DM/ha, resp.”
Claim · model-written summary
The highest recorded net sorghum yield was 23.7 t DM/ha.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest net yields recorded for maize and sorghum were 12.0 and 23.7 t DM/ha, resp.”
Claim · model-written summary
The authors attribute the higher sorghum yield to lower lodging susceptibility and a longer growing period.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The higher yield of sorghum was probably not due to better drought resistance but to lower lodging susceptibility and a longer growing period.”
Claim · model-written summary
Small plot maize yield trials have limited applicability to mechanized harvesting with available Kenyan hybrids.
- Material
- Kenyan maize hybridse0
- Outcome
- limited applicability to mechanized harvesting systemse0
- Comparator
- mechanized harvesting systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of small-plot maize yield trials is considered to have limited applicability to mechanized harvesting systems when presently available Kenyan maize hybrids are used.”
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