Abstract
Spunbonded polyester or polystyrene row covers were used as additional cold protection for spinach (Spinacia oleracea), kale (Brassica oleracea), pak choi (Brassica rapa) and P-types of lettuce (Lactuca savita) grown in ground beds under unheated polyethylene tunnels during the fall and winter of 1991 and 1992 in climatic zone 6. Temperatures inside poly tunnels averaged 2.4C warmer than outside. Average temperatures were 1.9C warmer than control under polystyrene and 1.5C warmer under spunbonded polyester. Average hourly temperatures showed both row covers offered significantly more cold protection than the greenhouse covering alone; but the two row covers offered similar protection from the cold. Row covers did not result in fresh weight differences in most of the species tested, except kale which had greater fresh weight in control. It may be concluded that during a similar mild winter, these cool season vegetables could be grown under unheated polyethylene tunnels with no additional protection necessary. When temperatures are lower, row covers could provide the protection required to produce these 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 5
Claim · model-written summary
Row covers generally did not change fresh weight of spinach (Spinacia oleracea).
- Taxon
- spinach (Spinacia oleracea)
Spinacia oleraceae1 - Treatment
- Row coverse0
- Outcome
- fresh weighte0
- Direction
- did not result in fresh weight differencese0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row covers did not result in fresh weight differences in most of the species tested, except kale which had greater fresh weight in control.”
e1“spinach (Spinacia oleracea), kale (Brassica oleracea), pak choi (Brassica rapa) and P-types of lettuce (Lactuca savita)”
Claim · model-written summary
Row covers generally did not change fresh weight of pak choi.
- Taxon
- pak choi (Brassica rapa)
Brassica rapae1 - Treatment
- Row coverse0
- Outcome
- fresh weighte0
- Direction
- did not result in fresh weight differencese0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row covers did not result in fresh weight differences in most of the species tested, except kale which had greater fresh weight in control.”
e1“pak choi (Brassica rapa)”
Claim · model-written summary
Kale had greater fresh weight in the control.
- Taxon
- kale
Brassica oleracea var. viridise0 - Treatment
- Row coverse0
- Outcome
- fresh weighte0
- Direction
- greatere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Row covers did not result in fresh weight differences in most of the species tested, except kale which had greater fresh weight in control.”
Claim · model-written summary
Authors conclude extra protection is unnecessary under similarly mild winters.
Verbatim
e0“during a similar mild winter, these cool season vegetables could be grown under unheated polyethylene tunnels with no additional protection necessary.”
Claim · model-written summary
Authors suggest row covers for colder production conditions.
Verbatim
e0“When temperatures are lower, row covers could provide the protection required to produce these crops.”
The same questions in other papers
trap barrier · growth · Spinacia oleracea (spinach)Positive and negative results
1 in the opposite direction
- positive
trap barrier · growth · Brassica rapa (field mustard)Positive and negative results
3 in the opposite direction
- positive
- positive
- positive
trap barrier · growth · Brassica oleracea (wild cabbage)Positive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 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.