Abstract
Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P. The groundnut yield increased with applied P, but significant increase was obtained only with SP in the first year and with SP and DAP in the second year. Applied P increased the concentration of P in kernels and in foliage over control (no-P) irrespective of the fertilizer source. S content, however, increased significantly only with the application of SP. The lack of response to fertilizer phosphorus in these P and S deficient soils (0–15 cm) can be attributed to the sub-surface soil layers rich in available P, and imbalanced nutrition caused by S deficiency. To investigate whether the superiority of SP was due to its S contribution, an additional experiment was conducted in the second year, in which S (as gypsum) equal to that supplied by SP was added to TSP and DAP treatments. The pod yield and concentration of P and S in foliage were practically equal from all the three fertilizer sources.
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Claims 7
Claim · model-written summary
Applied P increased groundnut yield.
- Taxon
- groundnut
Arachis hypogaeae1 - Treatment
- applied Pe2
- Outcome
- groundnut yielde2
- Direction
- increasede2
- Setting
- Tolewal loamy sand soile1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P”
e2“The groundnut yield increased with applied P, but significant increase was obtained only with SP in the first year and with SP and DAP in the second year”
Claim · model-written summary
Single superphosphate (SP) significantly increased groundnut yield in the first year.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P”
e2“The groundnut yield increased with applied P, but significant increase was obtained only with SP in the first year and with SP and DAP in the second year”
Claim · model-written summary
SP and DAP significantly increased groundnut yield in the second year.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- SP and DAPe2
- Outcome
- yielde2
- Direction
- increasee2
- Qualifier
- second yeare2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P”
e2“The groundnut yield increased with applied P, but significant increase was obtained only with SP in the first year and with SP and DAP in the second year”
Claim · model-written summary
Applied P increased the P concentration in groundnut kernels and foliage over the no-P control, irrespective of fertilizer source.
- Taxon
- groundnutArachis hypogaeae1
- Organ / stage
- kernels and in foliagee3
- Treatment
- Applied Pe3
- Outcome
- concentration of P in kernels and in foliagee3
- Direction
- increasede3
- Qualifier
- irrespective of the fertilizer sourcee3
- Comparator
- control (no-P)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P”
e3“Applied P increased the concentration of P in kernels and in foliage over control (no-P) irrespective of the fertilizer source”
Claim · model-written summary
S content of groundnut increased significantly only with the application of SP.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- the application of SPe4
- Outcome
- S contente4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P”
e4“S content, however, increased significantly only with the application of SP”
Claim · model-written summary
The lack of response to fertilizer P is attributed to sub-surface soil layers rich in available P and to imbalanced nutrition caused by S deficiency.
- Taxon
- groundnutArachis hypogaeae1
- Outcome
- lack of response to fertilizer phosphoruse5
- Qualifier
- sub-surface soil layers rich in available P, and imbalanced nutrition caused by S deficiencye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P”
e5“The lack of response to fertilizer phosphorus in these P and S deficient soils (0–15 cm) can be attributed to the sub-surface soil layers rich in available P, and imbalanced nutrition caused by S deficiency”
Claim · model-written summary
Pod yield and foliar P and S concentrations of groundnut were practically equal across SP, TSP and DAP when S (as gypsum) equal to that of SP was added to TSP and DAP.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- S (as gypsum)e6
- Outcome
- pod yield and concentration of P and S in foliagee7
- Direction
- practically equale7
- Comparator
- SPe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Two field experiments were conducted with groundnut on Tolewal loamy sand soil to compare single superphosphate (SP), triple superphosphate (TSP) and diammonium phosphate (DAP) as source of P”
e6“an additional experiment was conducted in the second year, in which S (as gypsum) equal to that supplied by SP was added to TSP and DAP treatments”
e7“The pod yield and concentration of P and S in foliage were practically equal from all the three fertilizer sources”
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