Abstract
A field experiment was conducted during the rainy reason of 1999 and 2000 on sandy-loam soil of Agricultural College, Tirupati, under rainfed conditions to study the effect of integrated nitrogen-management practices on the yield of sweet potato (Ipomoea batatas L.). The investigation revealed that an integrated use of 50% N through fertilizer + 50% N through pig manure resulted in the highest yield owing to higher yield attributes coupled with higher utilization and harvest indices. However, The maximum net returns as well as benefit: cost ratio were obtained with the application of 50% N through fertilizer + 50% N through poultry manure due to lesser cost per unit of nutrients (poultry manure contains more N, P2O5 and K2O than farmyard manure and pig manure). In general, higher yield, net returns and benefit: cost ratio were obtained with the conjunctive use of 50% N through fertilizers and 50% N through any of the organic manures (F N50; + PGM N50; FN50; + FYM N50; F N50 + PLM50) compared with other nitrogen-management practices.
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Claims 8
Claim · model-written summary
Half fertilizer nitrogen plus half pig-manure nitrogen gave the highest sweet potato yield.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatast0 - Treatment
- 50% N through fertilizer + 50% N through pig manuree0
- Outcome
- yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“50% N through fertilizer + 50% N through pig manure resulted in the highest yield”
t0“sweet potato”
Claim · model-written summary
The high yield with pig manure was attributed to yield attributes and utilization and harvest indices.
- Taxon
- sweet potatoIpomoea batatast0
- Outcome
- yielde0
- Qualifier
- higher yield attributes coupled with higher utilization and harvest indicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet potato”
e0“highest yield owing to higher yield attributes coupled with higher utilization and harvest indices”
Claim · model-written summary
Half fertilizer nitrogen plus half poultry-manure nitrogen gave maximum net returns.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- 50% N through fertilizer + 50% N through poultry manuree0
- Outcome
- net returnse0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet potato”
e0“The maximum net returns as well as benefit: cost ratio were obtained with the application of 50% N through fertilizer + 50% N through poultry manure”
Claim · model-written summary
Half fertilizer nitrogen plus half poultry-manure nitrogen gave the maximum benefit:cost ratio.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- 50% N through fertilizer + 50% N through poultry manuree0
- Outcome
- benefit: cost ratioe0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet potato”
e0“The maximum net returns as well as benefit: cost ratio were obtained with the application of 50% N through fertilizer + 50% N through poultry manure”
Claim · model-written summary
The poultry-manure economic advantage was attributed to its lower nutrient unit cost.
- Taxon
- sweet potatoIpomoea batatast0
- Outcome
- lesser cost per unit of nutrientse0
- Qualifier
- poultry manure contains more N, P2O5 and K2O than farmyard manure and pig manuree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet potato”
e0“due to lesser cost per unit of nutrients (poultry manure contains more N, P2O5 and K2O than farmyard manure and pig manure)”
Claim · model-written summary
Combined fertilizer and organic manure generally increased sweet potato yield relative to other nitrogen practices.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- conjunctive use of 50% N through fertilizers and 50% N through any of the organic manurese0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- other nitrogen-management practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet potato”
e0“higher yield, net returns and benefit: cost ratio were obtained with the conjunctive use of 50% N through fertilizers and 50% N through any of the organic manures (F N50; + PGM N50; FN50; + FYM N50; F N50 + PLM50) compared with other nitrogen-management practices”
Claim · model-written summary
Combined fertilizer and organic manure generally increased sweet potato net returns relative to other nitrogen practices.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- conjunctive use of 50% N through fertilizers and 50% N through any of the organic manurese0
- Outcome
- net returnse0
- Direction
- highere0
- Comparator
- other nitrogen-management practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet potato”
e0“higher yield, net returns and benefit: cost ratio were obtained with the conjunctive use of 50% N through fertilizers and 50% N through any of the organic manures (F N50; + PGM N50; FN50; + FYM N50; F N50 + PLM50) compared with other nitrogen-management practices”
Claim · model-written summary
Combined fertilizer and organic manure generally increased sweet potato benefit:cost ratio relative to other nitrogen practices.
- Taxon
- sweet potatoIpomoea batatast0
- Treatment
- conjunctive use of 50% N through fertilizers and 50% N through any of the organic manurese0
- Outcome
- benefit: cost ratioe0
- Direction
- highere0
- Comparator
- other nitrogen-management practicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sweet potato”
e0“higher yield, net returns and benefit: cost ratio were obtained with the conjunctive use of 50% N through fertilizers and 50% N through any of the organic manures (F N50; + PGM N50; FN50; + FYM N50; F N50 + PLM50) compared with other nitrogen-management practices”
The same questions in other papers
organic · yield · Ipomoea batatas (sweet potato)Positive and negative results
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- no effect
- positive
- positive
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See all 7 papers →fertilization · yield · Ipomoea batatas (sweet potato)Positive and negative results
125 papers in the same direction as this paper · 18 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- no effect
141 papers more in this group
See all 145 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.