Abstract
SUMMARY An on-farm trial was conducted in the northern Guinea savanna of Nigeria, over a period of five years, with the objectives of quantifying the effects on maize of applying cattle manure in combination with synthetic fertilizer with regard to soil characteristics, yield, plant nutrition and profitability. Maize grain yield was significantly increased by the annual application of cattle manure, compared to maize receiving an equal amount of N through synthetic fertilizer, but only from the third year of the experiment. The application of manure resulted in higher soil Kjel N, Bray-I P and exchangeable K values, and an increased N utilization efficiency by maize, suggesting that yield-limiting factors other than N deficiencies were of lesser importance than in the treatment receiving sole inorganic fertilizer. Nutrients other than N applied via the manure, particularly P, K and/or B, may have contributed to the higher grain yields in treatments receiving manure. A partial budgeting analysis revealed that, over a 5-year period, investments in the application of manure, in combination with synthetic fertilizer, resulted in higher margins than the application of fertilizer alone. However, analyses of marginal rates of return of changes from low urea N to high urea N or additional manure applications suggested that it was more profitable to invest in additional urea than in organic manure in the first two years of the experiment. The results suggested that manure applications, even when applied at relatively high rates, did not serve as a quick fix to on-farm soil fertility problems, but over a longer period, manure applied in combination with synthetic fertilizers did provide a significant and profitable contribution to enhanced cereal production.
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 6
Claim · model-written summary
Annual cattle manure increased maize grain yield relative to equal N from synthetic fertilizer, beginning in year three.
- Treatment
- annual application of cattle manuree0
- Outcome
- Maize grain yielde0
- Direction
- increasede0
- Qualifier
- only from the third year of the experimente0
- Comparator
- maize receiving an equal amount of N through synthetic fertilizere0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MAIZE”
e0“Maize grain yield was significantly increased by the annual application of cattle manure, compared to maize receiving an equal amount of N through synthetic fertilizer, but only from the third year of the experiment.”
Claim · model-written summary
Manure increased soil Kjel N, Bray-I P and exchangeable K values.
- Treatment
- application of manuree0
- Outcome
- soil Kjel N, Bray-I P and exchangeable K valuese0
- Direction
- highere0
Not reportedTaxonComparator
Verbatim
t0“MAIZE”
e0“The application of manure resulted in higher soil Kjel N, Bray-I P and exchangeable K values”
Claim · model-written summary
Manure increased N utilization efficiency by maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MAIZE”
e0“The application of manure resulted in higher soil Kjel N, Bray-I P and exchangeable K values, and an increased N utilization efficiency by maize”
Claim · model-written summary
Manure with synthetic fertilizer gave higher margins over five years than fertilizer alone.
- Treatment
- application of manure, in combination with synthetic fertilizere0
- Outcome
- marginse0
- Direction
- highere0
- Qualifier
- over a 5-year periode0
- Comparator
- application of fertilizer alonee0
Not reportedTaxon
Verbatim
t0“MAIZE”
e0“over a 5-year period, investments in the application of manure, in combination with synthetic fertilizer, resulted in higher margins than the application of fertilizer alone”
Claim · model-written summary
Additional urea was more profitable than organic manure in the first two years.
- Outcome
- profitablee0
- Direction
- moree0
- Qualifier
- first two years of the experimente0
- Comparator
- organic manuree0
Not reportedTaxon
Verbatim
t0“MAIZE”
e0“it was more profitable to invest in additional urea than in organic manure in the first two years of the experiment”
Claim · model-written summary
The authors concluded that manure was no quick fix for on-farm soil fertility, but gave a significant profitable long-term contribution with synthetic fertilizers.
- Treatment
- manure applied in combination with synthetic fertilizerse0
- Outcome
- enhanced cereal productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“MAIZE”
e0“manure applications, even when applied at relatively high rates, did not serve as a quick fix to on-farm soil fertility problems, but over a longer period, manure applied in combination with synthetic fertilizers did provide a significant and profitable contribution to enhanced cereal production”
The same questions in other papers
fertilization · nutrient: efficiency · Zea mays (maize)Results differ
173 papers in the same direction as this paper · 12 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- negative
185 papers more in this group
See all 189 papers →fertilization · yield · Zea mays (maize)Positive and negative results
3,484 papers in the same direction as this paper · 338 in the opposite direction · 85 reporting no difference from an alternative
- no effect
- positive
- negative
3,904 papers more in this group
See all 3,908 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.