Abstract
Despite an increase in sudangrass cultivation, fertilization is still dependent on farmers experience due to the absence of standard fertilization recipe. The objective of this study is to investigate the influence of soil and crop parameters on sudangrass productivity, and to suggest the necessity of standard fertilization guideline. For this purpose, we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province and analyzed soil chemical properties and sudangrass yield. Exchangeable K, Ca and Mg affected the yield of sudangrass, and especially Ca/K and Mg/K were closely associated with yield. In terms of nitrogen supply, excessive nitrogen application resulted in an adverse effect on yield. Fertilization was negatively correlated with nitrogen recovery and nitrogen use efficiency, and positive correlation was evident between soil chemical properties or between crop parameters. These findings imply that an adjustment of fertilization including compost and soil chemical properties ensure favorable sudangrass production, and this study suggests the necessity of standard and/or soil-testing fertilization guideline with further work.Nitrogen fertilization rates and nitrogen use efficiency by yield of sudangrass. ○ = High potential outlier. * = High extreme values.
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Claims 7
Claim · model-written summary
Exchangeable K, Ca and Mg affected sudangrass yield.
- Taxon
- sudangrass
Sorghum ×drummondiie0 - Compound
- Exchangeable K, Ca and Mge1
- Outcome
- yielde1
- Direction
- affectede1
- Setting
- Chungbuk provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province”
e1“Exchangeable K, Ca and Mg affected the yield of sudangrass”
Claim · model-written summary
Ca/K and Mg/K ratios were closely associated with sudangrass yield.
- Taxon
- sudangrassSorghum ×drummondiie0
- Compound
- Ca/K and Mg/Ke2
- Outcome
- yielde2
- Direction
- closely associatede2
- Setting
- Chungbuk provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province”
e2“especially Ca/K and Mg/K were closely associated with yield”
Claim · model-written summary
Excessive nitrogen application had an adverse effect on sudangrass yield.
- Taxon
- sudangrassSorghum ×drummondiie0
- Treatment
- excessive nitrogen applicatione3
- Outcome
- yielde3
- Direction
- adverse effecte3
- Setting
- Chungbuk provincee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province”
e3“excessive nitrogen application resulted in an adverse effect on yield”
Claim · model-written summary
Fertilization was negatively correlated with nitrogen recovery and nitrogen use efficiency in sudangrass.
- Taxon
- sudangrassSorghum ×drummondiie0
- Treatment
- Fertilizatione4
- Outcome
- nitrogen recovery and nitrogen use efficiencye4
- Direction
- negatively correlatede4
- Setting
- Chungbuk provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province”
e4“Fertilization was negatively correlated with nitrogen recovery and nitrogen use efficiency”
Claim · model-written summary
A positive correlation was evident between soil chemical properties or between crop parameters in sudangrass farms.
- Taxon
- sudangrassSorghum ×drummondiie0
- Outcome
- between soil chemical properties or between crop parameterse5
- Direction
- positive correlatione5
- Setting
- Chungbuk provincee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province”
e5“positive correlation was evident between soil chemical properties or between crop parameters”
Claim · model-written summary
An adjustment of fertilization including compost and soil chemical properties ensures favorable sudangrass production.
- Taxon
- sudangrassSorghum ×drummondiie0
- Treatment
- an adjustment of fertilization including composte6
- Outcome
- favorable sudangrass productione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province”
e6“an adjustment of fertilization including compost and soil chemical properties ensure favorable sudangrass production”
Claim · model-written summary
A standard and/or soil-testing fertilization guideline is necessary for sudangrass.
- Taxon
- sudangrassSorghum ×drummondiie0
- Outcome
- the necessity of standard and/or soil-testing fertilization guidelinee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we conducted a survey on fertilization at 24 sudangrass farms in the Chungbuk province”
e7“suggests the necessity of standard and/or soil-testing fertilization guideline”
The same questions in other papers
nitrogen · yield · Sorghum x drummondii (Sudan grass)Results differ
1 paper in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
11 papers more in this group
See all 15 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.