Abstract
AbstractA growth chamber study with Sassafras soil (Typic Hapludults) was conducted to find combinations or blends of composts and fertilizers which would be equal to the inorganic N fertilizer requirement of tall fescue (Festuca arundinacea). Soil was amended with four rates of compost to provide 0, 16.7, 33, or 50 percent of the total 300 kg N ha−1 applied. The remaining N, 100, 83.3, 67, or 50 percent was provided by NH4NO3. Composts used were a biosolids compost(BC) or a compost made from both biosolids and refuse(MC). Shredded hardwood bark (B) and N fertilizer combinations were tested to determine the effect of the organic matter fraction in compost on fescue. All combinations were compared to 50 percent (N50) to 100 percent (N100) fertilizer (300 kg N ha−1 NH4NO3) application rates and to each other. Yield and N uptake from the N83 and N100 were equal. Fescue yields of blends were lower than N83 or N100. The 33 percent biosolids/refuse compost N:67 percent NH4NO3 (MC67) combination had equal N uptake to N83 or N100. Because compost N is only partially mineralizable during the first year, the equality of compostfertilizer treatments to fertilizer alone suggests that other ingredients than N are benefitting the fescue. Yield and N uptake from blends containing shredded bark were equal to the N fertilizer alone treatments indicating that there was no benefit to fescue from the bark (organic matter) addition in this study. The data suggest that some composts may substitute for a portion of the N requirement of crops.
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 6
Claim · model-written summary
Yield and N uptake from the N83 and N100 fertilizer treatments of tall fescue were equal
- Taxon
- tall fescue
Lolium arundinaceume0 - Treatment
- N83e1
- Outcome
- Yield and N uptakee1
- Direction
- equale1
- Comparator
- N100e1
- Setting
- growth chambere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A growth chamber study with Sassafras soil (Typic Hapludults) was conducted to find combinations or blends of composts and fertilizers which would be equal to the inorganic N fertilizer requirement of tall fescue (Festuca arundinacea)”
e1“Yield and N uptake from the N83 and N100 were equal”
Claim · model-written summary
Yields of compost-fertilizer blends of tall fescue were lower than N83 or N100
- Taxon
- tall fescueLolium arundinaceume0
- Treatment
- blendse2
- Outcome
- yieldse2
- Direction
- lowere2
- Comparator
- N83 or N100e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A growth chamber study with Sassafras soil (Typic Hapludults) was conducted to find combinations or blends of composts and fertilizers which would be equal to the inorganic N fertilizer requirement of tall fescue (Festuca arundinacea)”
e2“Fescue yields of blends were lower than N83 or N100”
Claim · model-written summary
The 33 percent biosolids/refuse compost blend had N uptake equal to N83 or N100 in tall fescue
- Taxon
- tall fescueLolium arundinaceume0
- Treatment
- 33 percent biosolids/refuse compost N:67 percent NH4NO3 (MC67)e3
- Outcome
- N uptakee3
- Direction
- equale3
- Comparator
- N83 or N100e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A growth chamber study with Sassafras soil (Typic Hapludults) was conducted to find combinations or blends of composts and fertilizers which would be equal to the inorganic N fertilizer requirement of tall fescue (Festuca arundinacea)”
e3“The 33 percent biosolids/refuse compost N:67 percent NH4NO3 (MC67) combination had equal N uptake to N83 or N100”
Claim · model-written summary
Yield and N uptake from blends containing shredded bark were equal to N fertilizer alone in tall fescue
- Taxon
- tall fescueLolium arundinaceume0
- Treatment
- blends containing shredded barke4
- Outcome
- Yield and N uptakee4
- Direction
- equale4
- Comparator
- N fertilizer alone treatmentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A growth chamber study with Sassafras soil (Typic Hapludults) was conducted to find combinations or blends of composts and fertilizers which would be equal to the inorganic N fertilizer requirement of tall fescue (Festuca arundinacea)”
e4“Yield and N uptake from blends containing shredded bark were equal to the N fertilizer alone treatments”
Claim · model-written summary
Other ingredients than N in compost are suggested to benefit tall fescue
- Taxon
- tall fescueLolium arundinaceume0
- Outcome
- benefitting the fescuee6
- Qualifier
- other ingredients than Ne6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A growth chamber study with Sassafras soil (Typic Hapludults) was conducted to find combinations or blends of composts and fertilizers which would be equal to the inorganic N fertilizer requirement of tall fescue (Festuca arundinacea)”
e6“suggests that other ingredients than N are benefitting the fescue”
Claim · model-written summary
Some composts may substitute for a portion of the N requirement of crops
- Taxon
- tall fescueLolium arundinaceume0
- Outcome
- substitute for a portion of the N requiremente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A growth chamber study with Sassafras soil (Typic Hapludults) was conducted to find combinations or blends of composts and fertilizers which would be equal to the inorganic N fertilizer requirement of tall fescue (Festuca arundinacea)”
e5“The data suggest that some composts may substitute for a portion of the N requirement of crops”
The same questions in other papers
fertilization · nutrient: content · Lolium arundinaceum (tall fescue)Positive and negative results
6 papers in the same direction as this paper · 20 in the opposite direction
- positive
- positive
- positive
23 papers more in this group
See all 27 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.