Claim · model-written summary
In late October, seeds of native medic species were less permeable (10%) than those of cultivars (30%).
- Material
- native speciese1
- Outcome
- permeablee1
- Direction
- lesse1
- Value
- 10%e1
- Qualifier
- than those of the cultivars (30%)e1
- Comparator
- cultivarse1
MedicagoNot reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Three experiments which measured seed production and seed survival of annual medics ( Medicago spp.) were conducted at Tel Hadya in north Syria”
e1“In late October, seeds of the native species were less permeable (10%) than those of the cultivars (30%)”
Title
Seed production and seed survival under grazing of annual medics (Medicago spp.) in north Syria
P. S. Cocks The Journal of Agricultural Science 1988. doi:10.1017/s0021859600082009
Other claims from this paper (15)
- Intervention effect Seed production of annual medics was greatest at sowing rates of 20–40 kg/ha.
- Association Native medic species produced more seed (up to 1000 kg/ha) than cultivars (less than 500 kg/ha).
- Association In the late-flowering ecotype of M. noeana, the native-versus-cultivar difference in seed production was not significant.
- Recommendation Seed yields of 500–1000 kg/ha were considered sufficient to perpetuate the pastures.
- Association Seed yield in all ecotypes was closely related to the number of pods.
- Observation Up to 95% of flowers failed to produce mature pods in Expt 2.
- Intervention effect Flowers were more likely to mature at a high sowing rate (256 kg/ha).
- Intervention effect Flower production was greatest at sowing rates of less than 30 kg/ha.
- Intervention effect Flowers produced early in the season (before mid-April) were far more likely to give mature pods than late-produced flowers.
- Association Seed permeability of native medic species was similar to that of cultivars in Australia.
- Observation Seeds tended to gain permeability in autumn.
- Observation In Expt 1 there was a strong suggestion that the change from impermeability to permeability was reversible.
- Intervention effect Ewes grazing mature pods gained weight, apparently as long as pod availability exceeded 10 kg/ha.
- Observation The condition of ewes was not a good guide to an appropriate stocking rate for pasture persistence.
- Recommendation Farmers will need other methods to assist grazing management of medic pastures.