Abstract
Core Ideas Leguminous oil seed production is important in West Africa. Well‐determined response functions are important for optimization of profit from nutrient application. Crop response varied across Burkina Faso, Niger, and Nigeria. Nutrient response functions were determined for different production areas. Groundnut ( Arachis hypogaea L.) and soybean ( Glycine max L.) are important crops in West Africa for food security and marketing. Yields are low, partly due to soil fertility constraints. High net returns to fertilizer use are needed by poor smallholder farmers. Well‐determined nutrient response functions are needed to make profit‐oriented decisions. On‐farm and on‐station trials were conducted in Burkina Faso, Niger, and Nigeria to determine such functions and to diagnose other nutrient deficiencies. All trials included four rates each of P and K. The mean responses to 15 kg ha −1 of applied P for groundnut were 0.40 in Nigeria and 0.36 and 0.19 Mg ha −1 in Niger with and without 2.5 Mg ha −1 manure applied, respectively. Groundnut did not respond to K, S, Zn, and B in Nigeria, to K in Niger, and to all nutrients in Burkina Faso. Mean soybean yield was increased in Nigeria with the application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and B by 0.59, 0.23, 0.16, and 0.08 Mg ha −1 , respectively, but decreased with K application. The mean yield increases with the diagnostic treatment of N–P–K–Mg–S–Zn–B compared to P–K were 0.11 and 0.36 Mg ha −1 for groundnut in Nigeria and Niger, respectively, and 0.23 Mg ha −1 for soybean in Nigeria. Application of P to soybean in Nigeria and groundnut in Nigeria and Niger has high profit potential but only if some manure is applied in Niger.
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Claims 15
Claim · model-written summary
Groundnut yield responded by 0.40 Mg/ha to 15 kg/ha of applied P in Nigeria.
- Taxon
- groundnut
Arachis hypogaeae1 - Treatment
- 15 kg ha −1 of applied Pe1
- Outcome
- mean responsese1
- Direction
- increaseinferrede1
- Value
- 0.40e1
- Setting
- Nigeriae1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The mean responses to 15 kg ha −1 of applied P for groundnut were 0.40 in Nigeria and 0.36 and 0.19 Mg ha −1 in Niger with and without 2.5 Mg ha −1 manure applied, respectively”
Claim · model-written summary
Groundnut yield responded by 0.36 and 0.19 Mg/ha to 15 kg/ha of applied P in Niger with and without 2.5 Mg/ha manure.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- 15 kg ha −1 of applied Pe1
- Outcome
- mean responsese1
- Direction
- increaseinferrede1
- Value
- 0.36 and 0.19 Mg ha −1e1
- Qualifier
- with and without 2.5 Mg ha −1 manure appliede1
- Setting
- Nigere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The mean responses to 15 kg ha −1 of applied P for groundnut were 0.40 in Nigeria and 0.36 and 0.19 Mg ha −1 in Niger with and without 2.5 Mg ha −1 manure applied, respectively”
Claim · model-written summary
Groundnut did not respond to K, S, Zn and B in Nigeria.
- Taxon
- GroundnutArachis hypogaeae3
- Treatment
- K, S, Zn, and Be3
- Outcome
- did not responde3
- Direction
- no_changeinferrede3
- Setting
- Nigeriae3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Groundnut did not respond to K, S, Zn, and B in Nigeria, to K in Niger, and to all nutrients in Burkina Faso”
Claim · model-written summary
Groundnut did not respond to K in Niger.
- Taxon
- GroundnutArachis hypogaeae3
- Treatment
- Ke3
- Outcome
- did not responde3
- Direction
- no_changeinferrede3
- Setting
- Nigere3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Groundnut did not respond to K, S, Zn, and B in Nigeria, to K in Niger, and to all nutrients in Burkina Faso”
Claim · model-written summary
Groundnut did not respond to any nutrient in Burkina Faso.
- Taxon
- GroundnutArachis hypogaeae3
- Treatment
- all nutrientse3
- Outcome
- did not responde3
- Direction
- no_changeinferrede3
- Setting
- Burkina Fasoe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Groundnut did not respond to K, S, Zn, and B in Nigeria, to K in Niger, and to all nutrients in Burkina Faso”
Claim · model-written summary
Application of 15 kg/ha P increased soybean yield by 0.59 Mg/ha in Nigeria.
- Taxon
- soybean
Glycine maxe6 - Treatment
- application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and Be6
- Outcome
- Mean soybean yielde6
- Direction
- increasede6
- Value
- 0.59e6
- Setting
- Nigeriae6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Mean soybean yield was increased in Nigeria with the application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and B by 0.59, 0.23, 0.16, and 0.08 Mg ha −1 , respectively, but decreased with K application”
Claim · model-written summary
Application of 5 kg/ha S increased soybean yield by 0.23 Mg/ha in Nigeria.
- Taxon
- soybeanGlycine maxe6
- Treatment
- application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and Be6
- Outcome
- Mean soybean yielde6
- Direction
- increasede6
- Value
- 0.23e6
- Setting
- Nigeriae6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Mean soybean yield was increased in Nigeria with the application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and B by 0.59, 0.23, 0.16, and 0.08 Mg ha −1 , respectively, but decreased with K application”
Claim · model-written summary
Application of 1 kg/ha Zn increased soybean yield by 0.16 Mg/ha in Nigeria.
- Taxon
- soybeanGlycine maxe6
- Treatment
- application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and Be6
- Outcome
- Mean soybean yielde6
- Direction
- increasede6
- Value
- 0.16e6
- Setting
- Nigeriae6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Mean soybean yield was increased in Nigeria with the application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and B by 0.59, 0.23, 0.16, and 0.08 Mg ha −1 , respectively, but decreased with K application”
Claim · model-written summary
Application of 1 kg/ha B increased soybean yield by 0.08 Mg/ha in Nigeria.
- Taxon
- soybeanGlycine maxe6
- Treatment
- application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and Be6
- Outcome
- Mean soybean yielde6
- Direction
- increasede6
- Value
- 0.08e6
- Setting
- Nigeriae6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Mean soybean yield was increased in Nigeria with the application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and B by 0.59, 0.23, 0.16, and 0.08 Mg ha −1 , respectively, but decreased with K application”
Claim · model-written summary
Potassium application decreased soybean yield in Nigeria.
- Taxon
- soybeanGlycine maxe6
- Treatment
- K applicatione6
- Outcome
- Mean soybean yielde6
- Direction
- decreasede6
- Setting
- Nigeriae6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Mean soybean yield was increased in Nigeria with the application of 15, 5, 1, and 1 kg ha −1 of P, S, Zn, and B by 0.59, 0.23, 0.16, and 0.08 Mg ha −1 , respectively, but decreased with K application”
Claim · model-written summary
The diagnostic treatment N-P-K-Mg-S-Zn-B increased groundnut yield by 0.11 Mg/ha in Nigeria compared with P-K.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- diagnostic treatment of N–P–K–Mg–S–Zn–Be1
- Outcome
- mean yield increasese1
- Direction
- increasese1
- Value
- 0.11e1
- Comparator
- P–Ke1
- Setting
- Nigeriae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The mean yield increases with the diagnostic treatment of N–P–K–Mg–S–Zn–B compared to P–K were 0.11 and 0.36 Mg ha −1 for groundnut in Nigeria and Niger, respectively, and 0.23 Mg ha −1 for soybean in Nigeria”
Claim · model-written summary
The diagnostic treatment N-P-K-Mg-S-Zn-B increased groundnut yield by 0.36 Mg/ha in Niger compared with P-K.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- diagnostic treatment of N–P–K–Mg–S–Zn–Be1
- Outcome
- mean yield increasese1
- Direction
- increasese1
- Value
- 0.36e1
- Comparator
- P–Ke1
- Setting
- Nigere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The mean yield increases with the diagnostic treatment of N–P–K–Mg–S–Zn–B compared to P–K were 0.11 and 0.36 Mg ha −1 for groundnut in Nigeria and Niger, respectively, and 0.23 Mg ha −1 for soybean in Nigeria”
Claim · model-written summary
The diagnostic treatment N-P-K-Mg-S-Zn-B increased soybean yield by 0.23 Mg/ha in Nigeria compared with P-K.
- Taxon
- soybeanGlycine maxe1
- Treatment
- diagnostic treatment of N–P–K–Mg–S–Zn–Be1
- Outcome
- mean yield increasese1
- Direction
- increasese1
- Value
- 0.23e1
- Comparator
- P–Ke1
- Setting
- Nigeriae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The mean yield increases with the diagnostic treatment of N–P–K–Mg–S–Zn–B compared to P–K were 0.11 and 0.36 Mg ha −1 for groundnut in Nigeria and Niger, respectively, and 0.23 Mg ha −1 for soybean in Nigeria”
Claim · model-written summary
Application of P to soybean in Nigeria has high profit potential, but only if some manure is applied in Niger.
- Taxon
- soybeanGlycine maxe1
- Treatment
- Application of Pe1
- Outcome
- profit potentiale1
- Qualifier
- only if some manure is applied in Nigere1
- Setting
- Nigeriae1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Application of P to soybean in Nigeria and groundnut in Nigeria and Niger has high profit potential but only if some manure is applied in Niger”
Claim · model-written summary
Application of P to groundnut in Nigeria and Niger has high profit potential, but only if some manure is applied in Niger.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- Application of Pe1
- Outcome
- profit potentiale1
- Qualifier
- only if some manure is applied in Nigere1
- Setting
- Nigeria and Nigere1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Application of P to soybean in Nigeria and groundnut in Nigeria and Niger has high profit potential but only if some manure is applied in Niger”
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