Abstract
ABSTRACT Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon. Two on-farm experiments were undertaken to determine if soil fertility constraints, varieties and tillage practices were major limiting factors in groundnut production. In Experiment I, combinations of P and K fertilizers and ash were applied to local groundmtt. and ash to improved groundnuts (var. A-26). In Experiment 2, ash and dolomitic lime were tested with a local variety, combined with ridging or no ridging, and ash applied to a variegated Virginia (VV) groundnut variety. The experiments were conducted in six villages in southern Cameroon. Soil analytical variables were covariates in the analysis of variance. Groundnut yields were affected by significant ash × calcium saturation (Ca sat'n) and lime × Ca sat'n interactions. Where ash or lime was applied, yields were improved where Ca sat'n levels were below 0.62, but decreased at higher Ca sat' n levels. Significant village × variety interactions (p < 0.05) showed that varieties A-26 and VV yielded less than the local variety in several villages. P, K or tillage did not improve yields over the control. Both liming and ash applications increased soil pH, exch. Ca and Mg, and decreased exch. AI, while P + K applications increased exch. K and extractable P. The results show that ash application significantly influences several soil chemical variables. While yield increases in local groundnut yields can be realized at sites where Ca sat'n is low from either lime or ash applications, such increases are relatively minor. Alternative varieties tested offered no advantage over local varieties already grown in the area.
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Claims 10
Claim · model-written summary
Ash or lime improved yields where Ca saturation was below 0.62.
- Taxon
- Groundnut
Arachis hypogaeae0 - Treatment
- ash or limee2
- Outcome
- yieldse2
- Direction
- improvede2
- Qualifier
- where Ca sat'n levels were below 0.62e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e2“Where ash or lime was applied, yields were improved where Ca sat'n levels were below 0.62, but decreased at higher Ca sat' n levels”
Claim · model-written summary
Ash or lime decreased yields at higher Ca saturation levels.
- Taxon
- GroundnutArachis hypogaeae0
- Treatment
- ash or limee2
- Outcome
- yieldse2
- Direction
- decreasede2
- Qualifier
- higher Ca sat' n levelse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e2“Where ash or lime was applied, yields were improved where Ca sat'n levels were below 0.62, but decreased at higher Ca sat' n levels”
Claim · model-written summary
Varieties A-26 and VV yielded less than the local variety in several villages.
- Taxon
- GroundnutArachis hypogaeae0
- Material
- A-26 and VVe3
- Outcome
- yieldede3
- Direction
- lesse3
- Comparator
- the local varietye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e3“varieties A-26 and VV yielded less than the local variety in several villages”
Claim · model-written summary
P did not improve groundnut yields over the control.
- Taxon
- GroundnutArachis hypogaeae0
- Treatment
- Pe4
- Outcome
- yieldse4
- Direction
- did not improvee4
- Comparator
- the controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e4“P, K or tillage did not improve yields over the control”
Claim · model-written summary
K did not improve groundnut yields over the control.
- Taxon
- GroundnutArachis hypogaeae0
- Treatment
- Ke4
- Outcome
- yieldse4
- Direction
- did not improvee4
- Comparator
- the controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e4“P, K or tillage did not improve yields over the control”
Claim · model-written summary
Tillage did not improve groundnut yields over the control.
- Taxon
- GroundnutArachis hypogaeae0
- Treatment
- tillagee4
- Outcome
- yieldse4
- Direction
- did not improvee4
- Comparator
- the controle4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e4“P, K or tillage did not improve yields over the control”
Claim · model-written summary
Liming and ash applications increased soil pH, exchangeable Ca and Mg.
- Taxon
- GroundnutArachis hypogaeae0
- Treatment
- liming and ash applicationse5
- Outcome
- soil pH, exch. Ca and Mge5
- Direction
- increasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e5“Both liming and ash applications increased soil pH, exch. Ca and Mg, and decreased exch. AI”
Claim · model-written summary
Liming and ash applications decreased exchangeable Al.
- Taxon
- GroundnutArachis hypogaeae0
- Treatment
- liming and ash applicationse5
- Outcome
- exch. AIe5
- Direction
- decreasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e5“Both liming and ash applications increased soil pH, exch. Ca and Mg, and decreased exch. AI”
Claim · model-written summary
P + K applications increased exchangeable K and extractable P.
- Taxon
- GroundnutArachis hypogaeae0
- Treatment
- P + K applicationse6
- Outcome
- exch. K and extractable Pe6
- Direction
- increasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e6“P + K applications increased exch. K and extractable P”
Claim · model-written summary
Yield increases in local groundnut from liming or ash at low Ca saturation are relatively minor.
- Taxon
- GroundnutArachis hypogaeae0
- Outcome
- yield increases in local groundnut yieldse7
- Qualifier
- relatively minore7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Groundnut (Arachis hypogaea L) is an important intercrop in southern Cameroon”
e7“While yield increases in local groundnut yields can be realized at sites where Ca sat'n is low from either lime or ash applications, such increases are relatively minor”
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