Abstract
Nutrient supply through organic sources usually requires fortification for timely and optimum release of plant nutrients to achieve optimum crop performance. A pot experiment was conducted in a screen house to determine the optimum rate of cassava peel compost (CPC) fortification that supports optimum Amaranthus (Amaranthus cruentus L.) plant nutrient contents and residual soil nutrient contents. A compost of cassava peel and poultry manure was applied at 2.5; 5.0 and 7.5 t ha−1each complemented with either 25 or 50 kg nitrogen (N), using nitrogen, phosphorus and potassium (NPK) 20-10-10 at 2 weeks before sowing Amaranthus. An unfertilized treatment served as control. Seeds were sown in plastic containers with a surface diameter of 24 cm filled with 5 kg soil, with a drain underneath. Seedlings were thinned to 4 plants/pot 2 weeks after planting. Plants were harvested at 5 weeks by ratooning and plant re-growth also harvested after 5 weeks. Soil pH was lower with high rates of 5.0 and 7.5 t ha−1 CPC while the organic matter content was increased with increased CPC rate. Soil N was reduced but reflected in increased plant shoot and root N, with compost application. Soil P was generally increased but was not reflected in plant contents. Soil K contents were reduced and were reflected in increased plant contents. Application of 2.5 t ha−1 CPC, fortified with either 25 or 50 kg N ha−1 gave the optimum Amaranthus shoot nutrient contents with optimum residual soil nutrient contents.
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Claims 9
Claim · model-written summary
Higher compost rates lowered soil pH.
Not reportedTaxonComparator
Verbatim
e0“Soil pH was lower with high rates of 5.0 and 7.5 t ha−1 CPC while the organic matter content was increased with increased CPC rate.”
Claim · model-written summary
Increasing compost rate increased soil organic matter content.
Not reportedTaxonComparator
Verbatim
e0“Soil pH was lower with high rates of 5.0 and 7.5 t ha−1 CPC while the organic matter content was increased with increased CPC rate.”
Claim · model-written summary
Compost application reduced soil nitrogen.
Not reportedTaxonComparator
Verbatim
e0“Soil N was reduced but reflected in increased plant shoot and root N, with compost application.”
Claim · model-written summary
Compost application increased Amaranthus shoot and root nitrogen.
- Taxon
- Amaranthus
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=60)
Amaranthust0 - Treatment
- compost applicatione0
- Outcome
- plant shoot and root Ne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_with_green_foliage%2C_photographed_in_Tamil_Nadu%2C_India.jpg?width=500)
Verbatim
e0“Soil N was reduced but reflected in increased plant shoot and root N, with compost application.”
t0“Amaranthus”
Claim · model-written summary
Soil phosphorus generally increased.
Not reportedTaxon
Verbatim
e0“Soil P was generally increased but was not reflected in plant contents.”
Claim · model-written summary
Increased soil phosphorus was not reflected in plant phosphorus content.
- Taxon
- AmaranthusAmaranthust0
- Outcome
- plant contentse0
- Qualifier
- not reflectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil P was generally increased but was not reflected in plant contents.”
t0“Amaranthus”
Claim · model-written summary
Soil potassium content decreased.
Not reportedTaxon
Verbatim
e0“Soil K contents were reduced and were reflected in increased plant contents.”
Claim · model-written summary
Plant potassium content increased.
- Taxon
- AmaranthusAmaranthust0
- Outcome
- plant contentse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil K contents were reduced and were reflected in increased plant contents.”
t0“Amaranthus”
Claim · model-written summary
Compost at 2.5 t ha−1 fortified with 25 kg N ha−1 gave optimal shoot nutrient and residual soil nutrient contents.
- Taxon
- AmaranthusAmaranthuse0
- Treatment
- 2.5 t ha−1 CPC, fortified with either 25 or 50 kg N ha−1e0
- Outcome
- Amaranthus shoot nutrient contentse0
- Direction
- optimume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 2.5 t ha−1 CPC, fortified with either 25 or 50 kg N ha−1 gave the optimum Amaranthus shoot nutrient contents with optimum residual soil nutrient contents.”
The same questions in other papers
nitrogen · nutrient: content · AmaranthusPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
fertilization · nutrient: content · AmaranthusPositive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
5 papers more in this group
See all 9 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.