Red clover

Descriptors
Category: MORPHOLOGY
  1. Flowering score (Flowering score) Flowering score: an estimate of the amount of flowering.
  2. Leaf area (Leaf area) Leaf area. Size of leaf: length×width×0.75 (length and width in cm). Measured when most plants have flowered.
  3. Number of leaves (Number of leaves) Number of leaves of six weeks old plants
  4. Petiole length (cm) (Petiole length) Length of longest petiole at six weeks (cm)
  5. Stem length (cm) (Stem length) Length of longest stem (cm). Measured when most plants have flowered.
Category: PHENOLOGY
  1. Days to elongation (Days to elongation) The number of days until stem elongation was observed (internode > 2 cm) after transfer to 23 h photoperiod in a greenhouse set at 16 °C
  2. Flowering date (Flowering date) Flowering date (days after June first). When three heads start getting pink.
  3. Proportion flowering plants (Proportion flowering plants) Proportion of flowering plants
Category: STRESS
  1. Autumn status (Autumn status) Autumn status (general impression) at the growing season.
  2. Freezing tolerance: LT50 (Freezing tolerance: LT50) Freezing tolerance. LT50: the estimated temperature at which 50 % of the plants died. Note that the value of LT50 decreases with increasing freezing tolerance.
  3. Spring status (Spring status ) Spring status about two weeks after growth start.
  4. Winterhardiness after 3 weeks at -11 Cº (%) (WIN 3w/-11c) Surviving plants after 3 weeks at -11 Cº in %
  5. Winterhardiness after 3 weeks at -9 Cº (%) (WIN 3w/-9c) Surviving plants after 3 weeks at -9 Cº in %
  6. Winterhardiness after 6 weeks at -11 Cº (%) (WIN 6w/-11c) Surviving plants after 6 weeks at -11 Cº in %
  7. Winterhardiness after 6 weeks in -9 Cº (%) (WIN 6w/-9c) Surviving plants after 6 weeks at -9 Cº in %
  8. Winter survival (Winter survival) Proportion of plants surviving the winter from one year to the next.