Abstract
Cassava has a high yield potential that can be achieved with adequate liming and fertilization of the soil. The objective of this study was to evaluate the effect of organic fertilizer application, in association or not with liming, on yield and morphological characteristics of cassava roots and on chemical and physical properties of the soil. The experiment was arranged in the split plot design. The plots corresponded to limestone rates (0 and 2.5 t ha-1) and the sub-plots to chicken manure rates (0, 4, 8, and 12 t ha-1). Yield showed no response to limestone application, but responded to manure, producing 43 t ha-1 of roots at the rate of 8 t ha-1. The treatments had no influence on soil density and total porosity. The addition of manure increased the concentrations of P and K, while the addition of limestone increased Ca and Mg in the soil. The pH was affected only by limestone. Therefore, limestone does not affect crop yield and soil physical properties up to the amount used. Use of chicken manure up to 8 t ha-1 increased yield. Limestone and manure affect soil fertility in different ways.
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Claims 7
Claim · model-written summary
Limestone did not change cassava root yield.
- Taxon
- cassava
Manihot esculentat0 - Treatment
- limestone applicatione0
- Outcome
- Yielde0
- Direction
- no responsee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield showed no response to limestone application”
t0“cassava”
Claim · model-written summary
Manure increased cassava root yield to 43 t ha-1 at 8 t ha-1.
- Taxon
- cassavaManihot esculentat0
- Treatment
- manuree0
- Outcome
- rootse0
- Direction
- respondede0
- Value
- 43 t ha-1e0
- Qualifier
- rate of 8 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“responded to manure, producing 43 t ha-1 of roots at the rate of 8 t ha-1.”
t0“cassava”
Claim · model-written summary
Treatments did not affect soil density or total porosity.
- Taxon
- cassavaManihot esculentat0
- Treatment
- treatmentse0
- Outcome
- soil density and total porositye0
- Direction
- no influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatments had no influence on soil density and total porosity.”
t0“cassava”
Claim · model-written summary
Manure increased soil P and K concentrations.
- Taxon
- cassavaManihot esculentat0
- Treatment
- manuree0
- Outcome
- concentrations of P and Ke0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of manure increased the concentrations of P and K”
t0“cassava”
Claim · model-written summary
Limestone increased soil Ca and Mg concentrations.
- Taxon
- cassavaManihot esculentat0
- Treatment
- limestonee0
- Outcome
- Ca and Mg in the soile0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the addition of limestone increased Ca and Mg in the soil.”
t0“cassava”
Claim · model-written summary
Only limestone affected soil pH.
- Taxon
- cassavaManihot esculentat0
- Treatment
- limestonee0
- Outcome
- pHe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pH was affected only by limestone.”
t0“cassava”
Claim · model-written summary
The authors concluded that chicken manure up to 8 t ha-1 increases cassava yield.
- Taxon
- cassavaManihot esculentat0
- Treatment
- chicken manure up to 8 t ha-1e0
- Outcome
- Use of chicken manure up to 8 t ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Use of chicken manure up to 8 t ha-1 increased yield.”
t0“cassava”
The same questions in other papers
fertilization · growth · Manihot esculenta (cassava)Positive and negative results
64 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
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See all 71 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.