Abstract
Abstract The effect of different methods of plant residue management on soil properties and maize yield were studied in a field experiment conducted on a Typic Kandihumult in Bambui, Northwest Province of Cameroon. Ankara (a local practice of slow burning partially buried dry plant residues) was compared with surface burning and burying plant residues under the ridges without burning. The comparison was made under no fertilizer and with fertilizer application. Intensive heat generation under the ankara resulted in aggregation of soil colloids into larger particles. The clay‐sized fraction fell by 48% while the silt‐sized fraction rose by 30%. The ankara released large amounts of phosphorus (P) and potassium (K), and trapped adequate nitrogen (N) to sustain a maize yield six times that where residues were buried under the ridges without burning and no fertilizer application, and three times that of surface burning plant residues. The residual effects of the ankara on a second maize crop were not significant unless fertilizer NPK was applied. Poor residual effects of the ankara may be due to enhancement of leaching losses of N, K, and magnesium (Mg) from the root zone as a result of changes in the textural characteristics of the soil. Surface burning plant residues did not produce any adverse effects on soil particle size distribution.
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Claims 9
Claim · model-written summary
Intensive heat under the ankara aggregated soil colloids into larger particles.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e1“Intensive heat generation under the ankara”
e2“resulted in aggregation of soil colloids into larger particles”
Claim · model-written summary
Under the ankara the clay-sized soil fraction fell by 48%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e1“Intensive heat generation under the ankara”
e2“The clay‐sized fraction fell by 48%”
Claim · model-written summary
Under the ankara the silt-sized soil fraction rose by 30%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e1“Intensive heat generation under the ankara”
e2“the silt‐sized fraction rose by 30%”
Claim · model-written summary
The ankara released large amounts of phosphorus and potassium and trapped adequate nitrogen.
- Treatment
- ankarae2
- Outcome
- phosphorus (P) and potassium (K)e2
- Direction
- releasede2
- Qualifier
- trapped adequate nitrogen (N)e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e2“The ankara released large amounts of phosphorus (P) and potassium (K), and trapped adequate nitrogen (N)”
Claim · model-written summary
The ankara sustained a maize yield six times that where residues were buried under the ridges without burning and no fertilizer.
- Treatment
- ankarae1
- Outcome
- maize yielde1
- Direction
- higherinferrede1
- Value
- six timese1
- Qualifier
- no fertilizer applicatione1
- Comparator
- residues were buried under the ridges without burninge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The ankara released large amounts of phosphorus (P) and potassium (K), and trapped adequate nitrogen (N) to sustain a maize yield six times that where residues were buried under the ridges without burning and no fertilizer application, and three times that of surface burning plant residues”
Claim · model-written summary
The ankara sustained a maize yield three times that of surface burning plant residues.
- Treatment
- ankarae1
- Outcome
- maize yielde1
- Direction
- higherinferrede1
- Value
- three timese1
- Comparator
- surface burning plant residuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The ankara released large amounts of phosphorus (P) and potassium (K), and trapped adequate nitrogen (N) to sustain a maize yield six times that where residues were buried under the ridges without burning and no fertilizer application, and three times that of surface burning plant residues”
Claim · model-written summary
The residual effects of the ankara on a second maize crop were not significant unless fertilizer NPK was applied.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The residual effects of the ankara on a second maize crop were not significant unless fertilizer NPK was applied”
Claim · model-written summary
The authors suggest the poor residual effects of the ankara may be due to enhanced leaching losses of N, K and Mg from the root zone resulting from changed soil texture.
- Treatment
- ankarae1
- Outcome
- Poor residual effectse1
- Qualifier
- enhancement of leaching losses of N, K, and magnesium (Mg) from the root zonee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e1“Poor residual effects of the ankara may be due to enhancement of leaching losses of N, K, and magnesium (Mg) from the root zone as a result of changes in the textural characteristics of the soil”
Claim · model-written summary
Surface burning of plant residues did not produce adverse effects on soil particle size distribution.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“maize”
e1“Surface burning plant residues did not produce any adverse effects on soil particle size distribution”
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See all 10 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.