Abstract
SUMMARY The effect of variations in the relative sowing time and density of component crops in a maize/cowpea intercrop were examined in two experiments. In the first experiment, maize and cowpea were sown together, and either 10 or 21 days before or after each other. Maize yield was reduced when sown at the same time or after cowpea; intercrop cowpea yields were less than sole cowpea yields at all sowings. In the second experiment, maize densities of 35, 50 and 70 × 10 3 plants ha −1 were combined with cowpea densities of 70, 100 and 140 × 10 3 plants ha −1 . Increasing the density of either crop in the mixture resulted in increases in total yield. Maize reduced cowpea yields more than the effect of cowpea on maize yields. In terms of LER and total seed protein yield, there was no advantage of either staggered sowings over simultaneous sowing or of the various intercrop density combinations, except between the lowest and the highest densities of either maize or cowpea. The LERs appeared to follow the trends in cowpea yields and total seed protein yields the trends in maize yields.
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Claims 7
Claim · model-written summary
Maize yield was reduced when maize was sown at the same time as or after cowpea
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Maize yield was reduced when sown at the same time or after cowpea”
Claim · model-written summary
Intercrop cowpea yields were lower than sole cowpea yields at all sowings
- Taxon
- cowpea
Vigna unguiculatae2 - Treatment
- intercrope2
- Outcome
- cowpea yieldse2
- Direction
- less thane2
- Qualifier
- at all sowingse2
- Comparator
- sole cowpea yieldse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“intercrop cowpea yields were less than sole cowpea yields at all sowings”
Claim · model-written summary
Increasing the density of either crop in the mixture increased total yield
- Treatment
- Increasing the density of either crop in the mixturee3
- Outcome
- total yielde3
- Direction
- increasese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Increasing the density of either crop in the mixture resulted in increases in total yield”
e4“maize densities of 35”
Claim · model-written summary
Maize reduced cowpea yields more than cowpea reduced maize yields
- Taxon
- cowpeaVigna unguiculatae5
- Treatment
- Maizee5
- Outcome
- cowpea yieldse5
- Direction
- reducede5
- Qualifier
- more thane5
- Comparator
- the effect of cowpea on maize yieldse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Maize reduced cowpea yields more than the effect of cowpea on maize yields”
Claim · model-written summary
Staggered sowings and intercrop density combinations gave no advantage over simultaneous sowing in LER and total seed protein yield, except between the lowest and highest densities
- Treatment
- staggered sowingse6
- Outcome
- LER and total seed protein yielde6
- Direction
- no advantagee6
- Qualifier
- except between the lowest and the highest densities of either maize or cowpeae6
- Comparator
- simultaneous sowinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“In terms of LER and total seed protein yield, there was no advantage of either staggered sowings over simultaneous sowing or of the various intercrop density combinations, except between the lowest and the highest densities of either maize or cowpea”
Claim · model-written summary
LER appeared to follow the trends in cowpea yields
- Taxon
- cowpeaVigna unguiculatae7
- Outcome
- LERse7
- Direction
- followe7
- Comparator
- trends in cowpea yieldse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The LERs appeared to follow the trends in cowpea yields and total seed protein yields the trends in maize yields”
Claim · model-written summary
Total seed protein yield appeared to follow the trends in maize yields
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The LERs appeared to follow the trends in cowpea yields and total seed protein yields the trends in maize yields”
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