Abstract
Ethanol use in California is expected to rise to 1.62 billion gallons per year in 2012, more than 90% of which will be trucked or shipped into the state. Switchgrass, a nonnative grass common in other states, has been identified as a possible high-yielding biomass crop for the production of cellulosic ethanol. The productivity of the two main ecotypes of switchgrass, lowland and upland, was evaluated under irrigated conditions across four diverse California ecozones — from Tulelake in the cool north to warm Imperial Valley in the south. In the first full year of production, the lowland varieties yielded up to 17 tons per acre of biomass, roughly double the biomass yields of California rice or maize. The yield response to nitrogen fertilization was statistically insignificant in the first year of production, except for in the Central Valley plots that were harvested twice a year. The biomass yields in our study indicate that switchgrass is a promising biofuel crop for California.
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 2
Claim · model-written summary
Lowland switchgrass varieties yielded up to 17 tons per acre of biomass in the first full production year.
- Taxon
- Switchgrass
Panicum virgatumt0 - Material
- lowland varietiese0
- Outcome
- biomasse0
- Direction
- up toe0
- Value
- 17 tons per acree0
- Comparator
- California rice or maizee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first full year of production, the lowland varieties yielded up to 17 tons per acre of biomass, roughly double the biomass yields of California rice or maize.”
t0“Switchgrass”
Claim · model-written summary
The nitrogen fertilization yield response was statistically insignificant in the first year except in twice-harvested Central Valley plots.
- Taxon
- SwitchgrassPanicum virgatumt0
- Treatment
- nitrogen fertilizatione0
- Outcome
- yield responsee0
- Qualifier
- except for in the Central Valley plots that were harvested twice a yeare0
- Setting
- Central Valleye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield response to nitrogen fertilization was statistically insignificant in the first year of production, except for in the Central Valley plots that were harvested twice a year.”
t0“Switchgrass”
The same questions in other papers
fertilization · yield · Panicum virgatum (switchgrass)Results differ
5 papers in the same direction as this paper · 30 in the opposite direction
- positive
- positive
- positive
32 papers more in this group
See all 36 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.