Abstract
Abstract Direct use of poultry manure on agricultural lands may cause environmental concerns, so there is a need to establish the suitability of the application of biochar derived from poultry manure for calcareous soil chemical properties and plant growth. The purpose of this study was to evaluate the effects of processed poultry manure (0, 5, 10 and 20 g/kg) and its biochar (0, 2.5, 5, 10 and 20 g/kg) on soil chemical properties of a calcareous soil and growth of bean ( Phaseolus vulgaris ) and maize ( Zea mays ) plants. In the incubation experiment, both processed poultry manure ( PPM ) and biochar decreased pH and the concentration of plant‐available Fe of soil but increased plant‐available P, Zn, Cu and Mn concentrations. PPM and biochar increased the concentrations of exchangeable cations (K, Ca and Mg) in soil. PPM and biochar applications increased the growth of maize and bean plants. PPM and biochar resulted in increased concentrations of N, P, K, Ca, Fe, Zn, Cu and Mn in bean plants. In maize plants, PPM and biochar applications increased the N, P, K, Zn, Cu and Mn but decreased the Ca and Mg concentrations. Results of this study reveal that poultry manure biochar can be used effectively for agricultural purposes.
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Claims 13
Claim · model-written summary
Processed poultry manure and biochar decreased soil pH and plant-available Fe in calcareous soil.
- Taxon
- bean and maizet0
- Treatment
- processed poultry manure ( PPM ) and biochare1
- Outcome
- pH and the concentration of plant‐available Fee1
- Direction
- decreasede1
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e1“both processed poultry manure ( PPM ) and biochar decreased pH and the concentration of plant‐available Fe of soil”
Claim · model-written summary
Processed poultry manure and biochar increased plant-available P, Zn and Cu in calcareous soil.
- Taxon
- bean and maizet0
- Treatment
- processed poultry manure ( PPM ) and biochare1
- Outcome
- plant‐available P, Zn, Cue2
- Direction
- increasede2
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e1“both processed poultry manure ( PPM ) and biochar decreased pH and the concentration of plant‐available Fe of soil”
e2“but increased plant‐available P, Zn, Cu and Mn concentrations”
Claim · model-written summary
Processed poultry manure and biochar increased plant-available Mn in calcareous soil.
- Taxon
- bean and maizet0
- Treatment
- processed poultry manure ( PPM ) and biochare1
- Outcome
- Mn concentrationse2
- Direction
- increasede2
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e1“both processed poultry manure ( PPM ) and biochar decreased pH and the concentration of plant‐available Fe of soil”
e2“but increased plant‐available P, Zn, Cu and Mn concentrations”
Claim · model-written summary
PPM and biochar increased exchangeable K, Ca and Mg in the soil.
- Taxon
- bean and maizet0
- Treatment
- PPM and biochare3
- Outcome
- exchangeable cations (K, Ca and Mg)e3
- Direction
- increasede3
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e3“PPM and biochar increased the concentrations of exchangeable cations (K, Ca and Mg) in soil”
Claim · model-written summary
PPM and biochar applications increased the growth of maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“on the growth of bean and maize”
e4“PPM and biochar applications increased the growth of maize and bean plants”
Claim · model-written summary
PPM and biochar applications increased the growth of bean.
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e4“PPM and biochar applications increased the growth of maize and bean plants”
Claim · model-written summary
PPM and biochar increased the concentrations of N, P and K in bean plants.
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e5“PPM and biochar resulted in increased concentrations of N, P, K, Ca, Fe, Zn, Cu and Mn in bean plants”
Claim · model-written summary
PPM and biochar increased the concentrations of Ca, Fe and Zn in bean plants.
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e5“PPM and biochar resulted in increased concentrations of N, P, K, Ca, Fe, Zn, Cu and Mn in bean plants”
Claim · model-written summary
PPM and biochar increased the concentrations of Cu and Mn in bean plants.
Not reportedComparator
Verbatim
t0“on the growth of bean and maize”
e5“PPM and biochar resulted in increased concentrations of N, P, K, Ca, Fe, Zn, Cu and Mn in bean plants”
Claim · model-written summary
In maize, PPM and biochar applications increased the concentrations of N, P and K.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“on the growth of bean and maize”
e6“In maize plants, PPM and biochar applications increased the N, P, K, Zn, Cu and Mn”
Claim · model-written summary
In maize, PPM and biochar applications increased the concentrations of Zn, Cu and Mn.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“on the growth of bean and maize”
e6“In maize plants, PPM and biochar applications increased the N, P, K, Zn, Cu and Mn”
Claim · model-written summary
In maize, PPM and biochar applications decreased the Ca and Mg concentrations.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Verbatim
t0“on the growth of bean and maize”
e6“In maize plants, PPM and biochar applications increased the N, P, K, Zn, Cu and Mn”
e7“but decreased the Ca and Mg concentrations”
Claim · model-written summary
Poultry manure biochar can be used effectively for agricultural purposes.
Verbatim
t0“on the growth of bean and maize”
e7“Results of this study reveal that poultry manure biochar can be used effectively for agricultural purposes”
The same questions in other papers
biochar · growth · Phaseolus vulgaris (common bean)Positive and negative results
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- negative
- positive
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120 papers in the same direction as this paper · 22 in the opposite direction
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See all 143 papers →biochar · growth · Zea mays (maize)Positive and negative results
179 papers in the same direction as this paper · 9 in the opposite direction · 1 reporting no difference from an alternative
- positive
- positive
- negative
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See all 190 papers →fertilization · growth · Zea mays (maize)Positive and negative results
1,195 papers in the same direction as this paper · 149 in the opposite direction · 20 reporting no difference from an alternative
- positive
- positive
- no effect
1,361 papers more in this group
See all 1,365 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.