This term is not a standardized quantitative indicator in sunflower agronomy and is used only as a descriptive qualitative characteristic of a variety.
In the reference
10
varieties
crop Sunflower,
where this is mentioned in the description.
In sunflower breeding and variety testing, there are no specific measurement methods, units of measurement, or generally accepted scales for evaluating foliage. Instead of this indicator, parameters of leaf area and photosynthetic potential of crops are used to characterize the photosynthetic activity of the plant.
The concept of foliage is encountered exclusively as a qualitative morphological trait for comparing varieties based on the density of the leaf apparatus. Plants with less leaf area demonstrate reduced competitiveness against weed vegetation; however, no direct influence of foliage on yield has been recorded in variety testing methodologies.
General information about the subject — on the page
Leafiness.
Varieties of Sunflower mentioned in the description
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.