Abstract
SUMMARY The effect of no-tillage and mulch on soil properties and tuber yield of cassava was studied over a five year period on an infertile, acid Ultisol in south-eastern Nigeria. Mulch was applied at a rate of 12 t ha −1 as a split application once at planting and once six months after planting. No chemical fertilizers were used during the trial. Bulk density and proportion of micropores (pore radius, r, <1.4 µm) were greater, and proportion of macropores (r>14.4 µm) lower, with no-tillage. Water infiltration was increased by mulching, being greatest in tilled, mulched plots. Soil chemical properties were not significantly affected by tillage system, although levels of exchangeable calcium, magnesium and potassium were higher and acid saturation lower with mulching. Soil physical and chemical properties were best with tillage and mulching, and poorest when neither tillage nor mulch was used. Cassava tuber yield was unaffected by tillage system but increased by mulching.
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Claims 9
Claim · model-written summary
No-tillage raised bulk density and micropore proportion.
- Taxon
- Cassava
Manihot esculentat0 - Treatment
- no-tillagee0
- Outcome
- Bulk density and proportion of microporese0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bulk density and proportion of micropores (pore radius, r, <1.4 µm) were greater, and proportion of macropores (r>14.4 µm) lower, with no-tillage.”
t0“Cassava”
Claim · model-written summary
No-tillage reduced macropore proportion.
- Taxon
- CassavaManihot esculentat0
- Treatment
- no-tillagee0
- Outcome
- proportion of macroporese0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proportion of macropores (r>14.4 µm) lower, with no-tillage.”
t0“Cassava”
Claim · model-written summary
Mulching increased infiltration, most in tilled mulched plots.
- Taxon
- CassavaManihot esculentat0
- Treatment
- mulchinge0
- Outcome
- Water infiltratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water infiltration was increased by mulching, being greatest in tilled, mulched plots.”
t0“Cassava”
Claim · model-written summary
Tillage did not significantly affect soil chemical properties.
- Taxon
- CassavaManihot esculentat0
- Treatment
- tillage systeme0
- Outcome
- Soil chemical propertiese0
- Direction
- not significantly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil chemical properties were not significantly affected by tillage system”
t0“Cassava”
Claim · model-written summary
Mulching increased exchangeable calcium, magnesium and potassium.
- Taxon
- CassavaManihot esculentat0
- Treatment
- mulchinge0
- Outcome
- levels of exchangeable calcium, magnesium and potassiume0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“levels of exchangeable calcium, magnesium and potassium were higher and acid saturation lower with mulching.”
t0“Cassava”
Claim · model-written summary
Mulching lowered acid saturation.
- Taxon
- CassavaManihot esculentat0
- Treatment
- mulchinge0
- Outcome
- acid saturatione0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“acid saturation lower with mulching.”
t0“Cassava”
Claim · model-written summary
Soil physical and chemical properties were best with both tillage and mulch and poorest without either.
- Taxon
- CassavaManihot esculentat0
- Outcome
- Soil physical and chemical propertiese0
- Direction
- beste0
- Comparator
- neither tillage nor mulche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil physical and chemical properties were best with tillage and mulching, and poorest when neither tillage nor mulch was used.”
t0“Cassava”
Claim · model-written summary
Cassava tuber yield was unaffected by tillage.
- Taxon
- CassavaManihot esculentat0
- Treatment
- tillage systeme0
- Outcome
- Cassava tuber yielde0
- Direction
- unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava tuber yield was unaffected by tillage system”
t0“Cassava”
Claim · model-written summary
Mulching increased cassava tuber yield.
- Taxon
- CassavaManihot esculentat0
- Treatment
- mulchinge0
- Outcome
- Cassava tuber yielde1
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased by mulching.”
t0“Cassava”
e1“Cassava tuber yield was unaffected by tillage system but increased by mulching.”
The same questions in other papers
mulching · yield · Manihot esculenta (cassava)Results differ
11 papers in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
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See all 16 papers →tillage · yield · Manihot esculenta (cassava)Positive and negative results
4 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
10 papers more in this group
See all 14 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.