In biology, the BBCH-scale for faba beans describes the phenological development of faba beans using the BBCH-scale.
The phenological growth stages and BBCH-identification keys of faba beans are:
Growth stageCodeDescription0: Germination00 Dry seed01 Beginning of seed imbibition03 Seed imbibition complete05 Radicle emerged from seed07 Shoot emerged from seed (plumule apparent)08 Shoot growing towards soil surface09 Emergence: shoot emerges through soil surface1: Leaf development110 Pair of scale leaves visible (may be eaten or lost)11 First leaf unfolded12 2 leaves unfolded13 3 leaves unfolded1 . Stages continuous till ...19 9 or more leaves unfolded2: Formation of side shoots20 No side shoots21 Beginning of side shoot development: first side shoot detectable22 2 side shoots detectable23 3 side shoots detectable2 . Stages continuous till ...29 End of side shoot development: 9 or more side shoots detectable3: Stem elongation30 Beginning of stem elongation31 One visibly extended internode232 2 visibly extended internodes33 3 visibly extended internodes3 . Stages continuous till ...39 9 or more visibly extended internodes5: Inflorescence emergence50 Flower buds present, still enclosed by leaves51 First flower buds visible outside leaves55 First individual flower buds visible outside leaves but still closed59 First petals visible, many individual flower buds, still closed6: Flowering60 First flowers open61 Flowers open on first raceme63 Flowers open 3 racemes per plant65 Full flowering: flowers open on 5 racemes per plant67 Flowering declining69 End of flowering7: Development of fruit70 First pods have reached final length (“flat pod”)71 10% of pods have reached final length72 20% of pods have reached final length73 30% of pods have reached final length74 40% of pods have reached final length75 50% of pods have reached final length76 60% of pods have reached final length77 70% of pods have reached final length78 80% of pods have reached final length79 Nearly all pods have reached final length8: Ripening80 Beginning of ripening: seed green, filling pod cavity81 10% of pods ripe, seeds dry and hard82 20% of pods ripe, seeds dry and hard83 30% of pods ripe and dark, seeds dry and hard84 40% of pods ripe and dark, seeds dry and hard85 50% of pods ripe and dark, seeds dry and hard86 60% of pods ripe and dark, seeds dry and hard87 70% of pods ripe and dark, seeds dry and hard88 80% of pods ripe and dark, seeds dry and hard89 Fully ripe: nearly all pods dark, seeds dry and hard9: Senescence93 Stems begin to darken95 50% of stems brown or black97 Plant dead and dry99 Harvested product
1 Stem elongation may occur earlier than stage 19; in this case continue with the principal stage 3 2 First internode extends from the scale leaf node to the first true leaf node
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