Abstract
The production of pearl millet [ Pennisetumn glaucum (L.) R. Br.] in the low fertility sandy soils of the Sahel region of northern sub‐Saharan Africa requires careful management. An experiment was established in 1993 at the Niamey Center of the International Crops Research Institute for the Semi‐Arid Tropics, Niger. The objectives were to (i) determine the effect of long‐term applications of fertilizer, crop residue, cattle manure, and combinations of these on changes in grain yield (GY) and total dry matter (TDM) of pearl millet; (ii) determine the effect of management on nitrogen application efficiency (NAE) and nitrogen use efficiency (NUE), using data from 1998 and also from 2005 and 2006. Fertilizer use showed significant positive effects on GY and TDM from 1998 to 2006. The positive effects of organic matter appeared rather later, that is, around 8 yr after the start of the experiment. The GY and TDM were strongly affected by N and P but not K. From 1998 to 2000, N‐fertilizer strongly affected GY and TDM, but TDM increased gradually with the total amount N application, including N from organic matter. Nitrogen uptake by pearl millet was similar among treatments except for control in 2005, but in 2006 was higher in the treatments that combined fertilizer and organic matter. The NAE in combined applications of fertilizer and crop residue, and NUE in the treatments with residue showed higher trends than other treatments. This suggested that residue had more potential than cattle manure to enhance the effect of fertilizer.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Fertilizer use significantly increased grain yield (GY) and total dry matter (TDM) of pearl millet from 1998 to 2006.
- Taxon
- pearl millet
Cenchrus americanuse0 - Treatment
- Fertilizer usee1
- Outcome
- GY and TDMe1
- Direction
- increaseinferrede1
- Setting
- Niamey Centere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e1“Fertilizer use showed significant positive effects on GY and TDM from 1998 to 2006”
e2“An experiment was established in 1993 at the Niamey Center”
Claim · model-written summary
The positive effects of organic matter on pearl millet appeared around 8 years after the start of the experiment.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- organic mattere3
- Outcome
- positive effectse3
- Direction
- increaseinferrede3
- Qualifier
- around 8 yr after the start of the experimente3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e3“The positive effects of organic matter appeared rather later, that is, around 8 yr after the start of the experiment”
Claim · model-written summary
Grain yield and total dry matter of pearl millet were strongly affected by nitrogen.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- Ne4
- Outcome
- GY and TDMe4
- Qualifier
- strongly affectede4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e4“The GY and TDM were strongly affected by N and P but not K”
Claim · model-written summary
Grain yield and total dry matter of pearl millet were strongly affected by phosphorus.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- Pe4
- Outcome
- GY and TDMe4
- Qualifier
- strongly affectede4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e4“The GY and TDM were strongly affected by N and P but not K”
Claim · model-written summary
Grain yield and total dry matter of pearl millet were not affected by potassium.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- Ke4
- Outcome
- GY and TDMe4
- Direction
- no_changeinferrede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e4“The GY and TDM were strongly affected by N and P but not K”
Claim · model-written summary
TDM increased gradually with the total amount of N applied, including N from organic matter.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- total amount N applicatione6
- Outcome
- TDMe6
- Direction
- increasede6
- Qualifier
- graduallye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e6“but TDM increased gradually with the total amount N application, including N from organic matter”
Claim · model-written summary
Nitrogen uptake by pearl millet in 2005 was similar among treatments except the control.
- Taxon
- pearl milletCenchrus americanuse5
- Outcome
- Nitrogen uptakee5
- Qualifier
- in 2005e5
- Comparator
- controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Nitrogen uptake by pearl millet was similar among treatments except for control in 2005, but in 2006 was higher in the treatments that combined fertilizer and organic matter”
Claim · model-written summary
Nitrogen uptake by pearl millet in 2006 was higher in the treatments that combined fertilizer and organic matter.
- Taxon
- pearl milletCenchrus americanuse5
- Treatment
- combined fertilizer and organic mattere5
- Outcome
- Nitrogen uptakee5
- Direction
- highere5
- Qualifier
- in 2006e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Nitrogen uptake by pearl millet was similar among treatments except for control in 2005, but in 2006 was higher in the treatments that combined fertilizer and organic matter”
Claim · model-written summary
The NAE in combined fertilizer and crop residue applications showed higher trends than other treatments.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- combined applications of fertilizer and crop residuee6
- Outcome
- NAEe6
- Direction
- highere6
- Qualifier
- trendse6
- Comparator
- other treatmentse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e6“The NAE in combined applications of fertilizer and crop residue, and NUE in the treatments with residue showed higher trends than other treatments”
Claim · model-written summary
The NUE in the treatments with residue showed higher trends than other treatments.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- treatments with residuee6
- Outcome
- NUEe6
- Direction
- highere6
- Qualifier
- trendse6
- Comparator
- other treatmentse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e6“The NAE in combined applications of fertilizer and crop residue, and NUE in the treatments with residue showed higher trends than other treatments”
Claim · model-written summary
Residue appeared to have more potential than cattle manure to enhance the effect of fertilizer.
- Taxon
- pearl milletCenchrus americanuse0
- Treatment
- residuee7
- Outcome
- effect of fertilizere7
- Direction
- increaseinferrede7
- Comparator
- cattle manuree7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The production of pearl millet”
e7“This suggested that residue had more potential than cattle manure to enhance the effect of fertilizer”
The same questions in other papers
potassium · yield · Cenchrus americanus (pearl millet)Results differ
1 paper in the same direction as this paper · 28 in the opposite direction
- positive
- positive
- positive
26 papers more in this group
See all 30 papers →nitrogen · growth · Cenchrus americanus (pearl millet)Positive and negative results
39 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
42 papers more in this group
See all 46 papers →fertilization · nutrient: content · Cenchrus americanus (pearl millet)Positive and negative results
71 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- no effect
71 papers more in this group
See all 75 papers →fertilization · yield · Cenchrus americanus (pearl millet)Positive and negative results
248 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- no effect
255 papers more in this group
See all 259 papers →organic · nutrient: content · Cenchrus americanus (pearl millet)Results agree
10 papers in the same direction as this paper
- positive
- positive
- positive
7 papers more in this group
See all 11 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.