Abstract
The objective of this study was to evaluate the effect of cropping system and fertilizer on the root yield of three introduced high yielding cassava varieties (Afisiafi, Abasafitaa and Tekbankye) and two local varieties (Tuakentenma and Akosuatumtum). Two cropping systems (sole cassava and cassava-maize intercrop and five fertilizer regimes (0-0-0, 30-30-30, 60-60-60, 90-90-90 and 120-120-120 kg ha-1 N-P2O5-K2O) were studied in 2000 and 2001. A split-split plot design with four replications was used in the first study and a split-plot design for the second. Cassava-maize intercrop significantly reduced root yield at Mampong (2000) and Asuansi (2001) but not at Wenchi (2001). Afisiafi and Abasafitaa performed better than the local varieties or Tekbankye. At Asuansi and Kpeve, Afisiafi gave significantly greater root yield than Abasafitaa. Root yields of Afisiafi and Abasafita were, however, similar at Mampong and Wenchi in 2000. At Wenchi (2001), Abasafitaa gave significantly greater root yield than Afisiafi. At Mampong (2000) and Wenchi (2001), Afisiafi produced significantly more roots per stand than the local varieties and Abasafitaa gave significantly greater root yield per stand than the local variety. At all the four sites mineral fertilizer resulted in significantly greater root yield over control. At Asuansi (2001), Kpeve (2001) and Mampong (2000), 60-60-60 kg ha-1 N-P2O5-K2O gave significantly greater root yield than the 30-30-30 kg N-P2O5-K2O ha-1 but similar to the 90-90-90 and 120-120-120 kg ha-1 N-P2O5-K2O. At Wenchi (2001) all the rates gave similar root yield. Across locations, Afisiafi and Abasafitaa produced greater root yield than the local varieties and Tekbankye. Mineral fertilizer at 60-60-60 kg ha-1 N-P2O5-K2O was the optimum level for root yields. L\'objeclif de cette étude était pour évaluer l\'effet du système de la culture et l\'engrais sur le rendement racinaire de trios nouvelles variétés du manioc qui possèdent le rendement élevé. Les variétés sont (Afisiafi, Abasafitaa et Tekbankye) et deux variétés locales (Tuakentenma et Akosua tumtum). Deux systèmes de la culture (manioc unique, l\'intercalaire du manioc maïs et cinq régimes d\'engrais (0 - 0 - 0, 30 - 30 - 30, 60 - 60 - 60, 90 - 90 - 90 et 120 - 120 - 120 kg ha-1 N-P2O5-K2O) étaient étudiés en 2000 et 2001. Un déssein de deux parcelles avec quatre réplications était utilisé lors de la première étude et un déssein d\'une parcelle lors de la deuxième étude. L\'intercalaire du manioc - maïs a réduit considérablement le rendement racinaire à Mampong (2000) et Asuansi (2001) mais pas à Wenchi (2001). Afisiafi et Abasafitaa ont fonctionné mieux que les variétés locales ou Tekbankye. À Asuansi et Kpeve, Afisiafi a fait mieux que Abasafitaa en ce qui concerne le rendement racinaire. Le rendement racinaire était pourtant similaire à Mampong et Wenchi en 2000. À Wenchi (2001) Abasafitaa a fait mieux que Afisiafi. À Mampong (2000) et Wenchi (2001) Afisiafi a produit plus de racines par parcelle que les variétés locales. De la même manière, Abasafitaa a produit plus de racines que les variétés locales. À tous les quatre sites, l\'engrais minéral a résulté en plus élevé sur contrôle. À Asuansi (2001) Kpeve (2001) et Mampong (2000) 60 - 60 - 60 kg ha-1 N-P2O5K2O a donné un rendement plus grand que le 30 - 30 - 30 kg N-P2O5K2O ha-1 mais similaire au 90 - 90 - 90 et 120 - 120 - 120 kg ha-1 -P2O5K2O. À Wenchi (2001) tous les niveaux ont donné un similaire rendement. À travers les localisations, Afisiafi et Abasafitaa ont produit des rendements plus élevés que les variétés locales et Tekbankye. L\'engrais minéral à 60 - 60 - 60 kg ha-1 N-P2O5K2O était le niveau optimum pour les rendements racinaires. Keywords: keyCassava varieties, cropping system, fertilization, root yield. Agricultural and Food Science Journal of Ghana Vol. 6 2007 pp. 445-458
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Claims 20
Claim · model-written summary
Cassava-maize intercrop reduced root yield at Mampong.
- Taxon
- Cassava
Manihot esculentat0 - Treatment
- Cassava-maize intercrope0
- Outcome
- root yielde0
- Direction
- reducede0
- Setting
- Mamponge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava-maize intercrop significantly reduced root yield at Mampong (2000) and Asuansi (2001) but not at Wenchi (2001)”
t0“Cassava”
Claim · model-written summary
Cassava-maize intercrop reduced root yield at Asuansi.
- Taxon
- CassavaManihot esculentat0
- Treatment
- Cassava-maize intercrope0
- Outcome
- root yielde0
- Direction
- reducede0
- Setting
- Asuansie0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava-maize intercrop significantly reduced root yield at Mampong (2000) and Asuansi (2001) but not at Wenchi (2001)”
t0“Cassava”
Claim · model-written summary
Cassava-maize intercrop did not significantly reduce root yield at Wenchi.
- Taxon
- CassavaManihot esculentat0
- Treatment
- Cassava-maize intercrope0
- Outcome
- root yielde0
- Setting
- Wenchie0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava-maize intercrop significantly reduced root yield at Mampong (2000) and Asuansi (2001) but not at Wenchi (2001)”
t0“Cassava”
Claim · model-written summary
Afisiafi performed better than local varieties and Tekbankye.
- Taxon
- CassavaManihot esculentat0
- Material
- Afisiafie0
- Outcome
- performed bettere0
- Direction
- bettere0
- Comparator
- local varieties or Tekbankyee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Afisiafi and Abasafitaa performed better than the local varieties or Tekbankye”
t0“Cassava”
Claim · model-written summary
Abasafitaa performed better than local varieties and Tekbankye.
- Taxon
- CassavaManihot esculentat0
- Material
- Abasafitaae0
- Outcome
- performed bettere0
- Direction
- bettere0
- Comparator
- local varieties or Tekbankyee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Afisiafi and Abasafitaa performed better than the local varieties or Tekbankye”
t0“Cassava”
Claim · model-written summary
Afisiafi had greater root yield than Abasafitaa at Asuansi.
- Taxon
- CassavaManihot esculentat0
- Material
- Afisiafie0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- Abasafitaae0
- Setting
- Asuansie0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Asuansi and Kpeve, Afisiafi gave significantly greater root yield than Abasafitaa”
t0“Cassava”
Claim · model-written summary
Afisiafi had greater root yield than Abasafitaa at Kpeve.
- Taxon
- CassavaManihot esculentat0
- Material
- Afisiafie0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- Abasafitaae0
- Setting
- Kpevee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Asuansi and Kpeve, Afisiafi gave significantly greater root yield than Abasafitaa”
t0“Cassava”
Claim · model-written summary
Afisiafi and Abasafita had similar root yields at Mampong and Wenchi in 2000.
- Taxon
- CassavaManihot esculentat0
- Material
- Afisiafie0
- Outcome
- Root yieldse0
- Direction
- similare0
- Comparator
- Abasafitae0
- Setting
- Mampong and Wenchie0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root yields of Afisiafi and Abasafita were, however, similar at Mampong and Wenchi in 2000”
t0“Cassava”
Claim · model-written summary
Abasafitaa yielded more than Afisiafi at Wenchi in 2001.
- Taxon
- CassavaManihot esculentat0
- Material
- Abasafitaae0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- Afisiafie0
- Setting
- Wenchie0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Wenchi (2001), Abasafitaa gave significantly greater root yield than Afisiafi”
t0“Cassava”
Claim · model-written summary
Afisiafi produced more roots per stand than local varieties at Mampong.
- Taxon
- CassavaManihot esculentat0
- Material
- Afisiafie0
- Outcome
- roots per stande0
- Direction
- moree0
- Comparator
- local varietiese0
- Setting
- Mamponge0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Mampong (2000) and Wenchi (2001), Afisiafi produced significantly more roots per stand than the local varieties and Abasafitaa gave significantly greater root yield per stand than the local variety”
t0“Cassava”
Claim · model-written summary
Afisiafi produced more roots per stand than local varieties at Wenchi.
- Taxon
- CassavaManihot esculentat0
- Material
- Afisiafie0
- Outcome
- roots per stande0
- Direction
- moree0
- Comparator
- local varietiese0
- Setting
- Wenchie0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Mampong (2000) and Wenchi (2001), Afisiafi produced significantly more roots per stand than the local varieties and Abasafitaa gave significantly greater root yield per stand than the local variety”
t0“Cassava”
Claim · model-written summary
Abasafitaa had greater root yield per stand than the local variety.
- Taxon
- CassavaManihot esculentat0
- Material
- Abasafitaae0
- Outcome
- root yield per stande0
- Direction
- greatere0
- Comparator
- local varietye0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Mampong (2000) and Wenchi (2001), Afisiafi produced significantly more roots per stand than the local varieties and Abasafitaa gave significantly greater root yield per stand than the local variety”
t0“Cassava”
Claim · model-written summary
Mineral fertilizer increased root yield over control at all four sites.
- Taxon
- CassavaManihot esculentat0
- Treatment
- mineral fertilizere0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- controle0
- Setting
- all the four sitese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At all the four sites mineral fertilizer resulted in significantly greater root yield over control”
t0“Cassava”
Claim · model-written summary
The 60-60-60 fertilizer rate yielded more than 30-30-30 at Asuansi.
- Taxon
- CassavaManihot esculentat0
- Treatment
- 60-60-60 kg ha-1 N-P2O5-K2Oe0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- 30-30-30 kg N-P2O5-K2O ha-1e0
- Setting
- Asuansie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Asuansi (2001), Kpeve (2001) and Mampong (2000), 60-60-60 kg ha-1 N-P2O5-K2O gave significantly greater root yield than the 30-30-30 kg N-P2O5-K2O ha-1 but similar to the 90-90-90 and 120-120-120 kg ha-1 N-P2O5-K2O”
t0“Cassava”
Claim · model-written summary
The 60-60-60 fertilizer rate yielded more than 30-30-30 at Kpeve.
- Taxon
- CassavaManihot esculentat0
- Treatment
- 60-60-60 kg ha-1 N-P2O5-K2Oe0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- 30-30-30 kg N-P2O5-K2O ha-1e0
- Setting
- Kpevee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Asuansi (2001), Kpeve (2001) and Mampong (2000), 60-60-60 kg ha-1 N-P2O5-K2O gave significantly greater root yield than the 30-30-30 kg N-P2O5-K2O ha-1 but similar to the 90-90-90 and 120-120-120 kg ha-1 N-P2O5-K2O”
t0“Cassava”
Claim · model-written summary
The 60-60-60 fertilizer rate yielded more than 30-30-30 at Mampong.
- Taxon
- CassavaManihot esculentat0
- Treatment
- 60-60-60 kg ha-1 N-P2O5-K2Oe0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- 30-30-30 kg N-P2O5-K2O ha-1e0
- Setting
- Mamponge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Asuansi (2001), Kpeve (2001) and Mampong (2000), 60-60-60 kg ha-1 N-P2O5-K2O gave significantly greater root yield than the 30-30-30 kg N-P2O5-K2O ha-1 but similar to the 90-90-90 and 120-120-120 kg ha-1 N-P2O5-K2O”
t0“Cassava”
Claim · model-written summary
The 60-60-60 fertilizer rate had similar root yield to the higher rates at three sites.
- Taxon
- CassavaManihot esculentat0
- Treatment
- 60-60-60 kg ha-1 N-P2O5-K2Oe0
- Outcome
- root yielde0
- Direction
- similare0
- Comparator
- 90-90-90 and 120-120-120 kg ha-1 N-P2O5-K2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Asuansi (2001), Kpeve (2001) and Mampong (2000), 60-60-60 kg ha-1 N-P2O5-K2O gave significantly greater root yield than the 30-30-30 kg N-P2O5-K2O ha-1 but similar to the 90-90-90 and 120-120-120 kg ha-1 N-P2O5-K2O”
t0“Cassava”
Claim · model-written summary
All fertilizer rates gave similar root yield at Wenchi.
- Taxon
- CassavaManihot esculentat0
- Treatment
- all the ratese0
- Outcome
- root yielde0
- Direction
- similare0
- Setting
- Wenchie0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At Wenchi (2001) all the rates gave similar root yield”
t0“Cassava”
Claim · model-written summary
Afisiafi yielded more than local varieties and Tekbankye across locations.
- Taxon
- CassavaManihot esculentat0
- Material
- Afisiafie0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- local varieties and Tekbankyee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across locations, Afisiafi and Abasafitaa produced greater root yield than the local varieties and Tekbankye”
t0“Cassava”
Claim · model-written summary
Abasafitaa yielded more than local varieties and Tekbankye across locations.
- Taxon
- CassavaManihot esculentat0
- Material
- Abasafitaae0
- Outcome
- root yielde0
- Direction
- greatere0
- Comparator
- local varieties and Tekbankyee0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Across locations, Afisiafi and Abasafitaa produced greater root yield than the local varieties and Tekbankye”
t0“Cassava”
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