Abstract
Sustainable utilization of the limited land parcels is an important element in resource poor countries whosepopulations depend on agriculture for sustenance. In East Africa, collard vegetable production has been a venturefor many small-scale farmers. Since no approaches are possible in expanding the land resource, improved cropproduction techniques and management promise better yields. We report a potential and sustainable approach forcollard production. We compared the productivity of growing collards in an intercrop with chilli or spring onions,and varying nitrogen levels in each cropping system in terms of land equivalent ratios (LER). Our two - seasondata show that farmers can obtain higher yield in a unit of land when they intercrop collards with spring onionsas indicated by a LER of 1.06, and that growing collards in an intercrop with Chilli leads to a 14% wastage ofland resource compared to growing the crop as a monoculture. Further, we reveal that application of nitrogenousfertilizer might lead to increase in yield but it does not have a statistically significant benefit on the land resourceuse.There were no statistically significant relationship between the yield of collards and their heights in all croppingsystems, but a non-significant(r=-0.29, p=0.164) decline of yield was observed under collard + chilli intercrop.The number of collard leaves was significantly negatively correlated (r=- 0.456, p=0.0249) with yield LER undercollard + chilli intercrop but it did not influence the LER under collard + spring onion intercrop. These findingsdemonstrate the need for proper resource application, and that collard + spring onion intercrop has a potential toimprove collard yield per unit piece of cultivated land without a need for increasing the rate of nitrogenousfertilizer application.
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Claims 8
Claim · model-written summary
Collards intercropped with spring onions gave higher yield per unit of land (LER 1.06).
- Taxon
- Collards
Brassica oleracea var. viridist0 - Treatment
- intercrop collards with spring onionse1
- Outcome
- yield in a unit of lande1
- Direction
- highere1
- Value
- 1.06e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e1“farmers can obtain higher yield in a unit of land when they intercrop collards with spring onionsas indicated by a LER of 1.06”
Claim · model-written summary
Collards intercropped with chilli wasted 14% of land resource compared with monoculture.
- Taxon
- CollardsBrassica oleracea var. viridist0
- Treatment
- growing collards in an intercrop with Chillie2
- Outcome
- wastage of land resourcee2
- Direction
- increaseinferrede2
- Value
- 14%e2
- Comparator
- growing the crop as a monoculturee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e2“growing collards in an intercrop with Chilli leads to a 14% wastage ofland resource compared to growing the crop as a monoculture”
Claim · model-written summary
Nitrogen fertilizer might increase collard yield.
- Taxon
- CollardsBrassica oleracea var. viridist0
- Treatment
- application of nitrogenous fertilizere3
- Outcome
- yielde3
- Direction
- increasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e3“application of nitrogenousfertilizer might lead to increase in yield”
Claim · model-written summary
Nitrogen fertilizer did not have a statistically significant benefit on land resource use.
- Taxon
- CollardsBrassica oleracea var. viridist0
- Treatment
- application of nitrogenous fertilizere3
- Outcome
- land resource usee4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e3“application of nitrogenousfertilizer might lead to increase in yield”
e4“it does not have a statistically significant benefit on the land resourceuse”
Claim · model-written summary
The number of collard leaves was negatively correlated with yield LER under collard + chilli intercrop.
- Taxon
- CollardsBrassica oleracea var. viridist0
- Treatment
- collard + chilli intercrope5
- Outcome
- yield LERe5
- Direction
- negatively correlatede5
- Value
- r=- 0.456e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e5“The number of collard leaves was significantly negatively correlated (r=- 0.456, p=0.0249) with yield LER undercollard + chilli intercrop”
Claim · model-written summary
The number of collard leaves did not influence LER under collard + spring onion intercrop.
- Taxon
- CollardsBrassica oleracea var. viridist0
- Treatment
- collard + spring onion intercrope6
- Outcome
- LERe6
- Direction
- no_changeinferrede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e6“but it did not influence the LER under collard + spring onion intercrop”
Claim · model-written summary
No statistically significant relationship between collard yield and plant height in all cropping systems.
- Taxon
- CollardsBrassica oleracea var. viridist0
- Treatment
- cropping systemse1
- Outcome
- yield of collards and their heightse7
- Direction
- no_changeinferrede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e7“There were no statistically significant relationship between the yield of collards and their heights”
e1“in all croppingsystems”
Claim · model-written summary
Yield of collards tended to decline under collard + chilli intercrop, though not significantly.
- Taxon
- CollardsBrassica oleracea var. viridist0
- Treatment
- collard + chilli intercrope1
- Outcome
- yielde1
- Direction
- declinee1
- Value
- r=-0.29e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Collards”
e1“a non-significant(r=-0.29, p=0.164) decline of yield was observed under collard + chilli intercrop”
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