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Sorghum Producers
1 years, 2 weeks ago
from Sorghum Producers
". . . vegetative growth stages are designated by a V with a number following representing fully developed, emerged leaves. Only those leaves which have a leaf collar visible are fully developed and count as an appropriate growth stage. . . . Harsh environmental conditions, such as sand-blasting or hot, dry wind can also kill and dislodge lower leaves. However, every leaf, regardless of whether they are dead or even no longer attached, must be counted to determine appropriate growth stage."
http://www.mississippi-crops.com/2017/05/05/how-to-determine-growth-stages-of-young-corn-or-sorghum/