Abstract
Low availability of phosphorus (P) and potassium (K) in acidic soil is a major constraint for crop production. Cowpea was grown under split-plot design with three levels of K and P (viz., 100%, 75% and 50% of recommended dose). Green pod and stover yield was 20.9 and 16.9% higher with 100% K over 50% K application. Similarly, 100% P had 20.2% higher green pod and 16.6% higher stover yield over 50% P. Production efficiency was found higher with 100% K and P (48.6 and 49.0 kg ha-1 day-1 respectively) followed by 75% K. The actual gain of N, P and K, and balance were higher with the increase of K and P levels but reverse in case of gross and net return, and BCR. The energy productivity and energy use efficiency were higher on 100% K and P. Cowpea on acid soil along with 100% recommended dose of 40 kg K and 60 kg P ha-1 showed highest yield along with soil fertility restoration as well as reduced the cost of inorganic fertilizer, higher BCR (1.89) and energy requirement. DOI: http://dx.doi.org/10.3329/sja.v11i2.18408 SAARC J. Agri., 11(2): 129-140(2013)
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Claims 10
Claim · model-written summary
Full K raised green pod yield 20.9% over half K.
- Taxon
- Cowpea
Vigna unguiculatat0 - Treatment
- 100% Ke0
- Outcome
- Green pode0
- Direction
- highere0
- Value
- 20.9e0
- Comparator
- 50% Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“Green pod and stover yield was 20.9 and 16.9% higher with 100% K over 50% K application”
Claim · model-written summary
Full K raised stover yield 16.9% over half K.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 100% Ke0
- Outcome
- stover yielde0
- Direction
- highere0
- Value
- 16.9%e0
- Comparator
- 50% Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“Green pod and stover yield was 20.9 and 16.9% higher with 100% K over 50% K application”
Claim · model-written summary
Full P raised green pod yield 20.2% over half P.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 100% Pe0
- Outcome
- green pode0
- Direction
- highere0
- Value
- 20.2%e0
- Comparator
- 50% Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“100% P had 20.2% higher green pod and 16.6% higher stover yield over 50% P”
Claim · model-written summary
Full P raised stover yield 16.6% over half P.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 100% Pe0
- Outcome
- stover yielde0
- Direction
- highere0
- Value
- 16.6%e0
- Comparator
- 50% Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“100% P had 20.2% higher green pod and 16.6% higher stover yield over 50% P”
Claim · model-written summary
Production efficiency at full K was 48.6 kg ha-1 day-1.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 100% Ke0
- Outcome
- Production efficiencye0
- Direction
- highere0
- Value
- 48.6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“Production efficiency was found higher with 100% K and P (48.6 and 49.0 kg ha-1 day-1 respectively) followed by 75% K”
Claim · model-written summary
Production efficiency at full P was 49.0 kg ha-1 day-1.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 100% K and Pe0
- Outcome
- Production efficiencye0
- Direction
- highere0
- Value
- 49.0 kg ha-1 day-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“Production efficiency was found higher with 100% K and P (48.6 and 49.0 kg ha-1 day-1 respectively) followed by 75% K”
Claim · model-written summary
N, P and K gains and balances rose with K and P levels.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- K and P levelse0
- Outcome
- actual gain of N, P and K, and balancee0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“The actual gain of N, P and K, and balance were higher with the increase of K and P levels”
Claim · model-written summary
Gross and net return and BCR moved opposite to rising K and P levels.
- Taxon
- CowpeaVigna unguiculatat0
- Outcome
- gross and net return, and BCRe0
- Qualifier
- reversee0
Not reportedTreatmentDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“reverse in case of gross and net return, and BCR”
Claim · model-written summary
Energy productivity and use efficiency were higher at full K and P.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- 100% K and Pe0
- Outcome
- energy productivity and energy use efficiencye0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“The energy productivity and energy use efficiency were higher on 100% K and P”
Claim · model-written summary
The full 40 kg K and 60 kg P ha-1 rates gave highest yield, restored soil fertility, reduced fertilizer cost, and had BCR 1.89.
- Taxon
- CowpeaVigna unguiculatae0
- Treatment
- 100% recommended dose of 40 kg K and 60 kg P ha-1e0
- Outcome
- highest yielde0
- Direction
- higheste0
- Value
- 1.89e0
- Setting
- acid soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cowpea”
e0“Cowpea on acid soil along with 100% recommended dose of 40 kg K and 60 kg P ha-1 showed highest yield along with soil fertility restoration as well as reduced the cost of inorganic fertilizer, higher BCR (1.89) and energy requirement”
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See all 33 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.