Abstract
A five-month field experiment was conducted to investigate the effects of organic amendments on yields of two sweetpotato cultivars in a calcareous sandy soil of Samoa. The treatments consisted of three organic amendments; gliricidia, gliricidia + biochar, poultry litter, and a control, and two improved sweetpotato cultivars (IB/PH/03 and IB/PR/13). All amendments were applied at equivalent rate of 100 kg N ha–1 while biochar at 5 t ha–1. Plots were arranged in a RCB design with four replicates. Results showed that all organic amendments significantly increased total storage root and marketable storage root yields, compared to yields of the control. Total marketable root yield was increased by 134, 118, and 294% over control in response to gliricidia, poultry litter, and gliricidia + biochar treatments. The highest yield, yield attributing parameters and nutrient uptake by storage root were recorded in gliricidia + biochar treatment, which appears to synergistically influence crop yield relative to organic amendments applied singly; a potential amendment for improving sweetpotato productivity in sandy calcareous soil. Cultivar IB/PH/03 performed better than IB/PR/13 on all measured crop parameters except for fresh weight of non-marketable root and percent dry matter content showing better potentiality for promotion under similar agro-environmental conditions.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
All organic amendments significantly increased total storage root yield relative to control.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatase0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“all organic amendments significantly increased total storage root and marketable storage root yields, compared to yields of the control”
t0“sweetpotato”
Claim · model-written summary
All organic amendments significantly increased marketable storage root yield relative to control.
- Taxon
- sweetpotatoIpomoea batatase0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all organic amendments significantly increased total storage root and marketable storage root yields, compared to yields of the control”
t0“sweetpotato”
Claim · model-written summary
Gliricidia raised total marketable root yield by 134% over control.
- Taxon
- sweetpotatoIpomoea batatase0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total marketable root yield was increased by 134, 118, and 294% over control in response to gliricidia, poultry litter, and gliricidia + biochar treatments.”
t0“sweetpotato”
Claim · model-written summary
Poultry litter raised total marketable root yield by 118% over control.
- Taxon
- sweetpotatoIpomoea batatase0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total marketable root yield was increased by 134, 118, and 294% over control in response to gliricidia, poultry litter, and gliricidia + biochar treatments.”
t0“sweetpotato”
Claim · model-written summary
Gliricidia plus biochar raised total marketable root yield by 294% over control.
- Taxon
- sweetpotatoIpomoea batatase0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total marketable root yield was increased by 134, 118, and 294% over control in response to gliricidia, poultry litter, and gliricidia + biochar treatments.”
t0“sweetpotato”
Claim · model-written summary
Gliricidia plus biochar produced the highest yield and yield attributes.
- Taxon
- sweetpotatoIpomoea batatase0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield, yield attributing parameters and nutrient uptake by storage root were recorded in gliricidia + biochar treatment”
t0“sweetpotato”
Claim · model-written summary
Gliricidia plus biochar produced the highest nutrient uptake by storage roots.
- Taxon
- sweetpotatoIpomoea batatase0t0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest yield, yield attributing parameters and nutrient uptake by storage root were recorded in gliricidia + biochar treatment”
t0“sweetpotato”
Claim · model-written summary
Cultivar IB/PH/03 performed better than IB/PR/13 on most measured crop parameters.
- Taxon
- sweetpotatoIpomoea batatase0t0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivar IB/PH/03 performed better than IB/PR/13 on all measured crop parameters except for fresh weight of non-marketable root and percent dry matter content”
t0“sweetpotato”
Claim · model-written summary
IB/PR/13 exceeded IB/PH/03 for fresh weight of non-marketable root and percent dry matter content.
- Taxon
- sweetpotatoIpomoea batatase0t0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivar IB/PH/03 performed better than IB/PR/13 on all measured crop parameters except for fresh weight of non-marketable root and percent dry matter content”
t0“sweetpotato”
The same questions in other papers
biochar · quality: postharvest · Ipomoea batatas (sweet potato)Results agree
1 paper in the same direction as this paper
- positive
biochar · nutrient: content · Ipomoea batatas (sweet potato)Results agree
2 papers in the same direction as this paper
- positive
- positive
biochar · yield · Ipomoea batatas (sweet potato)Results agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.