Abstract
Forty-nine Syrian durum wheat landraces were sown in late Nov. 1989 at Tel Hadya, Syria (a low-yielding site) and 38 were sown in mid-Dec. at Homs (a high-yielding site) with or without N + P fertilizer. Jan. frosts caused less than 5% apparent foliar damage in any of the landraces. However, foliar damage by Mar. frosts averaged 23% (range 3-65%). Late frost tolerance of foliage appeared to be related to minimum winter temperatures in the regions of origin, with landraces from coastal regions showing the highest sensitivity. Fertilizer did not significantly affect foliar damage. In simulation studies based on observed foliar damage rates at Tel Hadya due to Mar. frosts, foliar damage alone did not decrease grain yield but decreased straw yield. Additional floret damage decreased grain yield and increased straw yield.
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
January frosts caused under 5% apparent foliar damage.
Verbatim
e0“Jan. frosts caused less than 5% apparent foliar damage in any of the landraces.”
Claim · model-written summary
March frosts caused average foliar damage of 23%, ranging 3-65%.
Not reportedTaxon
Verbatim
e0“foliar damage by Mar. frosts averaged 23% (range 3-65%).”
Claim · model-written summary
Late frost tolerance appeared related to regional minimum winter temperatures.
- Outcome
- Late frost tolerance of foliagee0
- Qualifier
- minimum winter temperaturese0
- Setting
- regions of origine0
Not reportedTaxonDirection
Verbatim
e0“Late frost tolerance of foliage appeared to be related to minimum winter temperatures in the regions of origin”
Claim · model-written summary
Coastal landraces showed the highest frost sensitivity.
Verbatim
e0“landraces from coastal regions showing the highest sensitivity”
Claim · model-written summary
Fertilizer did not significantly affect foliar damage.
Not reportedTaxonComparator
Verbatim
e0“Fertilizer did not significantly affect foliar damage.”
Claim · model-written summary
Simulated foliar damage alone did not decrease grain yield.
Not reportedTaxon
Verbatim
e0“foliar damage alone did not decrease grain yield but decreased straw yield.”
Claim · model-written summary
Simulated foliar damage alone decreased straw yield.
Not reportedTaxon
Verbatim
e0“foliar damage alone did not decrease grain yield but decreased straw yield.”
Claim · model-written summary
Simulated additional floret damage decreased grain yield.
Not reportedTaxon
Verbatim
e0“Additional floret damage decreased grain yield and increased straw yield.”
Claim · model-written summary
Simulated additional floret damage increased straw yield.
Not reportedTaxon
Verbatim
e0“Additional floret damage decreased grain yield and increased straw yield.”