Standard Classification Mechanics for Raw Dew Retted Flax Straw
Classification of raw dew retted flax straw relies on stalk morphology, moisture limits, and chemical pectin degradation to predict mechanical scutching yields.
Stalk Lodging Defect
Crop Damage
Agricultural stem failure refers to the displacement of crops from their upright position during the growing season. The occurrence of stalk lodging defect happens when high winds or heavy rainfall cause the flax plants to bend or fall flat against the soil. When this happens, the stems are exposed to excess moisture from the ground, which leads to premature and uneven retting.
This agricultural issue is documented in the crop monitoring report before harvest. The damp environment at the soil surface also increases the risk of rot, which severely weakens the structural cellulose within the stem.
Harvest Impact
Mechanical harvesting of fallen flax is difficult and often leads to significant crop loss. The presence of stalk lodging defect prevents the harvesting machines from pulling the flax stalks from the root cleanly, which is the standard method for preserving fibre length. In many cases, the tangled stems result in shorter, broken fibres that are only suitable for low-value tow production.
Fibre Grade
Fibre uniformity is essential for producing high-quality linen yarn. Stem portions affected by stalk lodging defect produce discoloured and weakened fibres because of soil contact and fungal overgrowth. The spinning mill’s receiving department uses this defect rate to reject or discount fibre batches that do not meet the raw material specifications for high-grade yarn.