Abstract
Presently cassava (Manihot esculenta Crantz) cultivation has shifted from the uplands to the lowlands, sequentially after main crop of rice, banana or vegetables and short-duration varieties (6-7 months) hold great promise. A three-year field experiment was carried out during 2007 to 2010 at Central Tuber Crops Research Institute, Thiruvananthapuram to develop feasible short-duration cassava-legume system in lowland situation akin to rice fallow. Two short-duration cassava varieties, Vellayani Hraswa and Sree Vijaya were evaluated in two cropping systems (sequential cropping and intercropping) involving two types of cowpea (vegetable (var. Pusa Komal) and grain types (var. C 152)) under two fertility levels based on soil testing (full and reduced) in split plot design. Vellayani Hraswa (24.55 tonnes/ha) produced significantly higher yield over Sree Vijaya (21.46 tonnes/ha) in systems involving cowpea. But the tuber and total biomass, crop growth rate, tuber bulking rate, mean tuber bulking rate, relative growth rate and harvest index of the varieties was comparable. Sequential cropping proved superior to intercropping as indicated by the significantly higher fresh tuber yield of 26.07 tonnes/ha under sequential cropping over 19.94 tonnes/ha in intercropping) and dry matter production. Both vegetable cowpea and grain cowpea were equally compatible with short-duration cassava under both the systems. Entire P and half N for short-duration cassava (N: P2O5: K2O @ 50:0:100 kg/ha) could be saved in both the systems involving cowpea by the third year. Sequential cropping of vegetable cowpea [Vigna unguiculata (L.) Walp.] followed by short-duration cassava (under full N) proved to be a profitable production system generating the highest net return (Rs. 97398/ha) and benefit: cost ratio (2.15).
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Claims 10
Claim · model-written summary
Vellayani Hraswa yielded 24.55 tonnes/ha, significantly above Sree Vijaya at 21.46 tonnes/ha in cowpea systems.
- Taxon
- cassava
Manihot esculentat0 - Material
- Vellayani Hraswae0
- Treatment
- systems involving cowpeae0
- Outcome
- yielde0
- Direction
- highere0
- Value
- 24.55 tonnes/hae0
- Qualifier
- 21.46 tonnes/hae0
- Comparator
- Sree Vijayae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“Vellayani Hraswa (24.55 tonnes/ha) produced significantly higher yield over Sree Vijaya (21.46 tonnes/ha) in systems involving cowpea”
Claim · model-written summary
The varieties had comparable tuber and total biomass and crop growth rate.
- Taxon
- cassavaManihot esculentat0
- Outcome
- tuber and total biomass, crop growth ratee0
- Direction
- comparablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“the tuber and total biomass, crop growth rate, tuber bulking rate, mean tuber bulking rate, relative growth rate and harvest index of the varieties was comparable”
Claim · model-written summary
The varieties had comparable tuber bulking, mean tuber bulking and relative growth rates.
- Taxon
- cassavaManihot esculentat0
- Outcome
- tuber bulking rate, mean tuber bulking rate, relative growth ratee0
- Direction
- comparablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“tuber bulking rate, mean tuber bulking rate, relative growth rate and harvest index of the varieties was comparable”
Claim · model-written summary
The varieties had comparable harvest index.
- Taxon
- cassavaManihot esculentat0
- Outcome
- harvest indexe0
- Direction
- comparablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“harvest index of the varieties was comparable”
Claim · model-written summary
Sequential cropping produced 26.07 tonnes/ha fresh tubers, significantly more than 19.94 tonnes/ha under intercropping.
- Taxon
- cassavaManihot esculentat0
- Treatment
- sequential croppinge0
- Outcome
- fresh tuber yielde0
- Direction
- highere0
- Value
- 26.07 tonnes/hae0
- Qualifier
- 19.94 tonnes/hae0
- Comparator
- intercroppinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“significantly higher fresh tuber yield of 26.07 tonnes/ha under sequential cropping over 19.94 tonnes/ha in intercropping”
Claim · model-written summary
Sequential cropping produced higher dry matter than intercropping.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Sequential croppinge0
- Outcome
- dry matter productione0
- Direction
- superiore0
- Comparator
- intercroppinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“Sequential cropping proved superior to intercropping as indicated by the significantly higher fresh tuber yield of 26.07 tonnes/ha under sequential cropping over 19.94 tonnes/ha in intercropping) and dry matter production”
Claim · model-written summary
Vegetable and grain cowpea were equally compatible with short-duration cassava in both systems.
- Taxon
- cassavaManihot esculentae0
- Interactor
- vegetable cowpeae0other
- Outcome
- equally compatiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“Both vegetable cowpea and grain cowpea were equally compatible with short-duration cassava under both the systems”
Claim · model-written summary
By year three, cowpea systems could save all P and half N for short-duration cassava.
- Taxon
- cassavaManihot esculentae0
- Outcome
- Entire P and half Ne0
- Direction
- savede0
- Qualifier
- by the third yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“Entire P and half N for short-duration cassava (N: P2O5: K2O @ 50:0:100 kg/ha) could be saved in both the systems involving cowpea by the third year”
Claim · model-written summary
Vegetable cowpea followed by short-duration cassava under full N gave the highest net return, Rs. 97398/ha.
- Taxon
- cassavaManihot esculentae0
- Treatment
- Sequential cropping of vegetable cowpeae0
- Outcome
- net returne0
- Direction
- higheste0
- Value
- Rs. 97398/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“Sequential cropping of vegetable cowpea [Vigna unguiculata (L.) Walp.] followed by short-duration cassava (under full N) proved to be a profitable production system generating the highest net return (Rs. 97398/ha) and benefit: cost ratio (2.15)”
Claim · model-written summary
The sequential vegetable-cowpea and cassava system had a benefit:cost ratio of 2.15.
- Taxon
- cassavaManihot esculentae0
- Outcome
- benefit: cost ratioe0
- Value
- 2.15e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“cassava (Manihot esculenta)”
e0“Sequential cropping of vegetable cowpea [Vigna unguiculata (L.) Walp.] followed by short-duration cassava (under full N) proved to be a profitable production system generating the highest net return (Rs. 97398/ha) and benefit: cost ratio (2.15)”
The same questions in other papers
Vigna unguiculata · yield · Manihot esculenta (cassava)Positive and negative results
12 papers in the same direction as this paper · 6 in the opposite direction · 1 reporting no difference from an alternative
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- positive
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