Abstract
Abstract The effects of N, P, K, and gypsum and timing of application of P on the performance of groundnuts ( Arachis hypogoea L.), grown on the Brown Sands of Guyana, were studied. Generally, 15 kg N/ha gave optimum production. However, in a dry season on the coarser textured soils and during all seasons on a finer textured soil 32 and 48 kg/ha of N were needed, respectively. Application of up to 30 kg P/ha increased yields on all soils found under savannah vegetation except the finest textured one. P did not increase yields of groundnut on the soil occurring under forest vegetation. Potassium within the range tested (124‐164 kg/ha) had no effect on yield. Application of up to 495 kg gypsum/ha increased yield and reduced the number of “pops.” Application of all the P at planting produced higher yields than when the application was split, and this effect was greater during periods of stress and at low rates of gypsum. Timing of P applications had no effect on the number of “pops.” Both P and K increased in all four soils with repeated applications of the respective fertilizers. The amounts accumulated however, were small relative to the quantities applied. Potassium accumulation increased with the clay content of the soils. Total N increased in two soils only.
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Claims 13
Claim · model-written summary
About 15 kg N/ha gave optimum groundnut production.
- Taxon
- Groundnuts
Arachis hypogaeat0 - Treatment
- 15 kg N/hae1
- Outcome
- productione1
- Direction
- optimume1
- Setting
- Brown Sands of Guyanae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e0“The effects of N, P, K, and gypsum and timing of application of P on the performance of groundnuts ( Arachis hypogoea L.), grown on the Brown Sands of Guyana, were studied”
e1“Generally, 15 kg N/ha gave optimum production”
Claim · model-written summary
Groundnut needed 32 and 48 kg/ha of N in a dry season on coarser soils and in all seasons on a finer soil, respectively.
- Taxon
- GroundnutsArachis hypogaeat0
- Outcome
- N were needede2
- Value
- 32 and 48 kg/hae2
- Qualifier
- in a dry season on the coarser textured soils and during all seasons on a finer textured soile2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e2“However, in a dry season on the coarser textured soils and during all seasons on a finer textured soil 32 and 48 kg/ha of N were needed, respectively”
Claim · model-written summary
Application of up to 30 kg P/ha increased groundnut yields on all soils under savannah vegetation except the finest textured one.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- Application of up to 30 kg P/hae3
- Outcome
- yieldse3
- Direction
- increasede3
- Qualifier
- except the finest textured onee3
- Setting
- all soils found under savannah vegetatione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e3“Application of up to 30 kg P/ha increased yields on all soils found under savannah vegetation except the finest textured one”
Claim · model-written summary
Phosphorus did not increase groundnut yields on the soil under forest vegetation.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- Pe4
- Outcome
- yieldse4
- Direction
- did not increasee4
- Setting
- the soil occurring under forest vegetatione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e4“P did not increase yields of groundnut on the soil occurring under forest vegetation”
Claim · model-written summary
Potassium within the range tested of 124-164 kg/ha had no effect on groundnut yield.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- Potassiume5
- Outcome
- yielde5
- Direction
- no_changeinferrede5
- Qualifier
- within the range tested (124‐164 kg/ha)e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e5“Potassium within the range tested (124‐164 kg/ha) had no effect on yield”
Claim · model-written summary
Application of up to 495 kg gypsum/ha increased groundnut yield.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- Application of up to 495 kg gypsum/hae6
- Outcome
- yielde6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e6“Application of up to 495 kg gypsum/ha increased yield and reduced the number of “pops.””
Claim · model-written summary
Application of up to 495 kg gypsum/ha reduced the number of “pops.” in groundnut.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- Application of up to 495 kg gypsum/hae6
- Outcome
- number of “pops.”e6
- Direction
- reducede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e6“Application of up to 495 kg gypsum/ha increased yield and reduced the number of “pops.””
Claim · model-written summary
Application of all the P at planting produced higher groundnut yields than split application, with a greater effect during stress and at low gypsum rates.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- Application of all the P at plantinge7
- Outcome
- yieldse7
- Direction
- highere7
- Qualifier
- this effect was greater during periods of stress and at low rates of gypsume7
- Comparator
- when the application was splite7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e7“Application of all the P at planting produced higher yields than when the application was split, and this effect was greater during periods of stress and at low rates of gypsum”
Claim · model-written summary
Timing of P applications had no effect on the number of “pops.” in groundnut.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- Timing of P applicationse1
- Outcome
- number of “pops.”e1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e1“Timing of P applications had no effect on the number of “pops.””
Claim · model-written summary
Repeated applications of the respective fertilizers increased soil P and K in all four soils.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- repeated applications of the respective fertilizerse1
- Outcome
- P and Ke1
- Direction
- increasede1
- Setting
- all four soilse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e1“Both P and K increased in all four soils with repeated applications of the respective fertilizers”
Claim · model-written summary
Accumulated soil P and K amounts were small relative to the quantities applied.
- Taxon
- GroundnutsArachis hypogaeat0
- Outcome
- amounts accumulatede1
- Qualifier
- small relative to the quantities appliede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e1“The amounts accumulated however, were small relative to the quantities applied”
Claim · model-written summary
Potassium accumulation in soil increased with the clay content of the soils.
- Taxon
- GroundnutsArachis hypogaeat0
- Treatment
- the clay content of the soilse1
- Outcome
- Potassium accumulatione1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e1“Potassium accumulation increased with the clay content of the soils”
Claim · model-written summary
Total N increased in two soils only.
- Taxon
- GroundnutsArachis hypogaeat0
- Outcome
- Total Ne1
- Direction
- increasede1
- Qualifier
- in two soils onlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Fertilizer Studies with Groundnuts”
e1“Total N increased in two soils only”
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See all 142 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.