{"id":822,"date":"2026-07-20T02:59:05","date_gmt":"2026-07-20T02:59:05","guid":{"rendered":"https:\/\/foragebalers.com\/?p=822"},"modified":"2026-07-20T03:25:09","modified_gmt":"2026-07-20T03:25:09","slug":"flax-straw-baling-preserving-fiber-quality-from-field-to-processing-plant","status":"publish","type":"post","link":"https:\/\/foragebalers.com\/ja\/%e5%bf%9c%e7%94%a8\/flax-straw-baling-preserving-fiber-quality-from-field-to-processing-plant\/","title":{"rendered":"\u4e9c\u9ebb\u308f\u3089\u306e\u68b1\u5305\uff1a\u7551\u304b\u3089\u52a0\u5de5\u5de5\u5834\u307e\u3067\u7e4a\u7dad\u306e\u54c1\u8cea\u3092\u7dad\u6301\u3059\u308b"},"content":{"rendered":"
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Cash Crops \u00b7 Flax Straw \u00b7 Textile Fibre Supply<\/div>\n

Europe’s Oldest Textile Fibre Crop \u2014 and Why Field Retting Still Defines Quality<\/p>\n

How Belgian, French, and Belarusian flax producers bale and deliver linen fibre straw \u2014 retting timing, moisture targets, and the bale specifications that determine factory acceptance.<\/p>\n<\/div>\n<\/div>\n

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Flax Straw and the Global Linen Industry: A Supply Chain Under Pressure<\/h2>\n

Linen textile production from flax (Linum usitatissimum<\/em>) is one of the world’s oldest industries, with archaeological evidence of linen weaving in ancient Egypt, Mesopotamia, and China dating back 5,000 years. In 2025, global linen fabric production is concentrated in Belgium and France (the primary European flax-growing and processing regions), Belarus and Ukraine (the primary eastern European producers), and China’s Heilongjiang province (the world’s largest flax fibre producer by volume). The global linen apparel market has grown steadily since 2018 as sustainability credentials, natural breathability, and biodegradability have driven consumer preference shifts in European and North American fashion markets.<\/p>\n

The entire commercial value of flax straw lies in the long bast fibres \u2014 thin, strong filaments 20 to 100 cm in length that run along the outer stem wall. These fibres are processed into linen thread and then linen fabric through a sequence of mechanical and chemical processing steps starting with field retting, then scutching, hackling, spinning, and weaving. Every step in this sequence either preserves or destroys a portion of the fibre length and tensile strength that determines the final thread quality. Of all the processing steps, field retting and baling are the ones where farmer management decisions have the greatest direct impact on fibre quality delivered to the scutching mill.<\/p>\n

This guide covers flax straw production specifically for textile fibre supply \u2014 the pathway with the highest value per tonne and the most demanding quality specifications. For operators producing flax for linseed oil (where straw quality is less critical), many of the principles still apply, but the precision of retting management and bale moisture specifications can be relaxed. For background on how baling format affects downstream processing across industrial crops, our article on the difference between round and square forage balers<\/a> covers the format trade-offs relevant to industrial crop supply chains.<\/p>\n<\/div>\n

\"Round<\/p>\n

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The Flax Crop Cycle and Harvest Timing<\/h2>\n

From Sowing to Pulling \u2014 The 100-Day Crop<\/h3>\n

Flax for textile fibre is sown in March to April in northern France, Belgium, and the Netherlands and reaches harvest readiness in 90 to 110 days \u2014 typically late June to late July. The crop must be pulled (harvested by uprooting, not cutting) rather than cut to preserve the full fibre length from the base of the stem to the seed head. Cutting removes the lower 10 to 20 cm of the stem, which contains the highest-quality, most uniform fibres \u2014 a significant quality and value loss that makes cutting unacceptable for textile fibre supply. Purpose-built flax pulling machines are the standard harvesting equipment; some operations combine pulling and spreading into a single pass using a pull-and-spread header.<\/p>\n

Harvest timing for fibre flax is defined by the yellowing of the lower third of the stem (the ‘green turning yellow’ stage, approximately 30 days after flowering), when the bast fibres have reached maximum length and tensile strength but before the stems lignify to the point where retting efficiency declines. Harvesting earlier (green stem) produces immature fibres with lower strength; harvesting later (fully brown, fully senesced) produces over-ripe fibres with excessive lignification that reduces retting efficiency and processing quality.<\/p>\n

Field Retting: The Quality-Defining Step<\/h3>\n

After pulling, the flax is spread in swathes across the field for field retting \u2014 a 3 to 6 week process in which morning dew and light rainfall activate soil and airborne microorganisms (primarily bacteria and fungi) that digest the pectin matrix bonding the bast fibres to the woody stem core (xylem). Effective retting separates the fibre bundles sufficiently for clean mechanical scutching at the mill, while preserving fibre length and tensile strength. Under-retting \u2014 insufficient microbial action \u2014 leaves pectin bridges intact that tear the fibres during scutching, reducing both fibre yield and quality grade. Over-retting \u2014 excessive microbial activity \u2014 weakens the cellulose structure of the fibres themselves, reducing tensile strength and the dyeability of the resulting linen thread.<\/p>\n

\n\n\n\n\n\n\n\n\n
Retting Duration<\/th>\nFibre Separation<\/th>\nFibre Strength<\/th>\nVisual Indicator<\/th>\nQuality Outcome<\/th>\n<\/tr>\n<\/thead>\n
2\u20133 weeks<\/td>\nIncomplete<\/td>\n\u826f\u3044<\/td>\nStraw remains brown<\/td>\nUnder-retted \u2014 scutching losses<\/td>\n<\/tr>\n
3\u20135 weeks \u2713<\/td>\nComplete<\/td>\n\u826f\u3044<\/td>\nStraw turns silver-grey<\/td>\nOptimal \u2014 premium fibre<\/td>\n<\/tr>\n
5\u20137 weeks<\/td>\nComplete<\/td>\n\u6e1b\u5c11<\/td>\nStraw bleaches pale<\/td>\nOver-retted \u2014 reduced tensile<\/td>\n<\/tr>\n
>7 weeks<\/td>\nComplete<\/td>\n\u8ca7\u3057\u3044<\/td>\nStraw whitens\/brittle<\/td>\nSeverely over-retted \u2014 unusable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
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Baling Retted Flax Straw: Specifications That Matter<\/h2>\n

Moisture at Baling \u2014 The Critical Parameter<\/h3>\n

Retted flax straw must be baled at 14 to 18% moisture<\/strong> for textile fibre supply. Above 18%, the retted fibres continue microbial degradation in the sealed bale, progressing from optimal retting to over-retting within 4 to 8 weeks \u2014 delivering a degraded product to the mill several months after harvest. Below 12%, the straw becomes brittle and fibre bundles fracture during bale formation, reducing the long-fibre content that the scutching mill’s quality payment system rewards.<\/p>\n

In Belgium and northern France \u2014 where July and August weather alternates between drying periods and Atlantic rainfall events \u2014 achieving the 3 to 5 week retting duration while also landing in the 14 to 18% moisture window at baling is a genuine operational challenge. The traditional French approach is to monitor retting completion daily from week 3 onward and to mobilise baling equipment within 24 to 48 hours of a confirmed drying period following confirmed retting completion. Belgian producers in Flanders, where summer rainfall is more frequent, may need 2 to 3 drying periods before moisture drops sufficiently for baling after retting is judged complete.<\/p>\n

Round Bale vs. Large Square Bale for Flax Supply<\/h3>\n

European scutching mills generally specify large rectangular (square) bales for textile fibre supply \u2014 the bale format allows more consistent fibre orientation and produces more uniform scutching yields than round bales where stem alignment varies across the bale cross-section. In France and Belgium, where scutching mills have standardised their receiving and processing equipment around large rectangular bales, round bales are accepted only for lower-specification fibre categories or for paper pulp supply. Operators specifically producing premium linen fibre for high-quality textile mills should confirm whether the receiving mill accepts round bales before investing in round bale production infrastructure.<\/p>\n

For biomass and paper pulp outlets \u2014 the secondary markets for flax straw that cannot meet textile fibre specification \u2014 round bales from the 9YG-1.25A \u53ef\u5909\u30c1\u30e3\u30f3\u30d0\u30fc\u5f0f\u4e38\u578b\u30d9\u30fc\u30e9\u30fc<\/a> are fully accepted and are the standard delivery format. Dual-market operations that sort bales at harvest into textile-specification and biomass-fallback categories based on retting quality and moisture assessment use round balers for the biomass portion and may contract a large square baler for the textile premium portion.<\/p>\n<\/div>\n

\"9YG-1.25A<\/p>\n

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Belarus and China’s Heilongjiang: Eastern Production Profiles<\/h2>\n

Belarus: Scale Production for Eastern European Mills<\/h3>\n

Belarus is Europe’s second-largest flax fibre producer after France, with approximately 45,000 to 60,000 hectares under cultivation annually and a vertically integrated textile industry that processes domestic fibre through state-owned scutching mills and linen weaving facilities. Belarusian flax production uses large-scale field operations with coordinated pulling, retting, and large rectangular bale production. The continental climate of Belarus (drier summers than Belgium and northwestern France) generally produces reliable retting conditions in July and August, though drought years can slow microbial retting activity and require supplementary dewing (mechanical application of water to the swathe) to maintain adequate retting rate.<\/p>\n

Heilongjiang: China’s Flax Belt<\/h3>\n

China’s Heilongjiang province grows approximately 100,000 to 150,000 hectares of flax per year \u2014 the largest single flax production area in the world \u2014 supplying domestic textile mills and producing retted fibre for export to Chinese and Korean linen manufacturers. Heilongjiang’s cool, continental climate (similar to Belarus) provides good summer drying conditions for retting, but the compressed August harvest window and large-scale production create significant logistical pressure to bale large volumes within a narrow weather window. Round bales from the 9YG-1.25A are used for biomass and paper supply; large rectangular balers dominate the textile fibre supply chain.<\/p>\n<\/div>\n

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Common Mistakes in Flax Straw Baling<\/h2>\n
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\u274c Cutting Instead of Pulling<\/div>\n

Cutting flax at ground level removes the basal 15 to 20 cm of stem where the longest, most uniform fibre bundles are found. Scutching mills grade fibre partly on average fibre length \u2014 a cut crop delivers a systematically shorter fibre that achieves a lower quality grade and lower price per tonne regardless of retting quality. Always pull, not cut, flax for textile fibre supply.<\/p>\n<\/div>\n

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\u274c Baling Above 20% Moisture After Retting<\/div>\n

Sealed bales of retted flax straw above 20% moisture continue microbial activity that progresses from completed retting into over-retting. Fibre strength declines measurably within 4 to 6 weeks of baling at this moisture \u2014 a degradation that is invisible externally but immediately apparent at the scutching mill’s quality assessment. Check moisture at three or more windrow base points before baling and delay if any reading exceeds 18%.<\/p>\n<\/div>\n

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\u26a0 Missing the Optimal Retting Window in Atlantic Weather<\/div>\n

Belgium and northwestern France experience frequent Atlantic fronts during the July to August retting period. Operations that wait for a full week of continuous sunshine before baling \u2014 when a 2 to 3 day drying period is all that is available \u2014 frequently miss the optimal retting window as another front arrives and over-retting begins. Take the drying window when it appears, even if conditions are less than ideal; a slightly sub-optimal moisture is recoverable through additional field drying, but over-retting is irreversible.<\/p>\n<\/div>\n

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Assuming All Retted Straw Meets Textile Specification<\/div>\n

Retting quality varies across a single field due to differences in swathe density, microtopography (wet low spots rett faster), and sunlight exposure. Sort bales at the windrow by visual retting assessment \u2014 silver-grey colour indicates optimal retting, brown indicates under-retting, and very pale or white straw indicates over-retting. Mixing quality levels in the same delivery lot reduces the average quality payment received.<\/p>\n<\/div>\n<\/div>\n

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\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n
\nWhat yield of retted flax straw can I expect per hectare?+<\/span><\/summary>\n
Fibre flax yields 4 to 8 tonnes of dry straw per hectare in western European production conditions. After retting and baling, the retted straw yield is typically 3.5 to 7 tonnes DM per hectare. The scutching mill extracts approximately 18 to 28% long fibre from the retted straw \u2014 giving a fibre yield of 0.7 to 2.0 tonnes of long-line linen fibre per hectare. Remaining material (short fibre tow and woody shiv) is also sold but at lower prices.<\/div>\n<\/details>\n
\nCan flax straw be used for animal bedding if fibre quality is below specification?+<\/span><\/summary>\n
Yes \u2014 retted flax straw that fails textile fibre specification (under-retted, over-retted, or contaminated) can be baled and sold as horse or pig bedding at \u20ac80 to \u20ac150 per tonne in European markets where buyers specifically seek linen-type bedding as an alternative to straw. The bedding market accepts below-specification fibre that the scutching mill would reject, providing a revenue floor for the portion of a crop that fails textile quality assessment. However, the price is significantly below the \u20ac200 to \u20ac600 per tonne achieved by textile-specification retted straw.<\/div>\n<\/details>\n
\nHow does dew retting differ from water retting, and which is more common?+<\/span><\/summary>\n
Dew retting \u2014 field retting using morning dew and light rainfall \u2014 is the dominant method in all western European and Chinese flax production. It is slow (3 to 6 weeks) but low-cost and produces fibre with acceptable colour for most linen applications. Water retting \u2014 submerging flax bundles in rivers or tanks of warm water \u2014 produces higher quality, more uniform fibre in 5 to 12 days but requires water access, creates nutrient-rich effluent requiring treatment, and is economically viable only for the highest-grade linen production (Belgian linen for premium apparel). Water retting is rarely practised commercially in China or Belarus due to scale and water quality constraints.<\/div>\n<\/details>\n
\nWhat tractor horsepower is needed for flax straw baling?+<\/span><\/summary>\n
Retted flax straw at 14 to 16% moisture is a very light, low-density crop \u2014 significantly lighter than hay silage or cereal straw at equivalent moisture. A 40 to 55 hp tractor handles flax straw baling without difficulty. The heavier power requirement is from the flax puller \u2014 pulling equipment operates at 70 to 100 hp depending on working width. As with all crop operations, the harvesting step requires more power than the baling step for flax.<\/div>\n<\/details>\n
\nIs there demand for Chinese Heilongjiang flax straw from European buyers?+<\/span><\/summary>\n
Yes \u2014 Chinese linen fibre and yarn are exported to European textile manufacturers at prices below European domestic production costs. Heilongjiang retted flax straw and processed linen tow are regularly imported by Belgian, Dutch, and French textile processors who blend Chinese fibre with domestic European fibre to balance cost and quality in their final products. The quality of Chinese fibre has improved significantly since 2015 as Heilongjiang producers have adopted improved variety and retting management practices developed in collaboration with European industry partners.<\/div>\n<\/details>\n<\/div>\n

\"EverPower<\/p>\n

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EverPower Baling Machinery Australia Pty Ltd \u00b7 \u30c1\u30e3\u30fc\u30eb\u30c8\u30f3\u5de5\u696d\u56e3\u5730<\/div>\n

Discuss Your Flax Straw Baling Operation<\/h2>\n

Tell us your production area, target mill, and retting management approach \u2014 we’ll help specify the right baler format for your linen fibre supply chain.<\/p>\n

\u898b\u7a4d\u3082\u308a\u3092\u4f9d\u983c\u3059\u308b<\/a> EverPower\u306b\u3064\u3044\u3066<\/a><\/div>\n
+61 2 9708 3322<\/a> \u00a0| \u2709 sales@foragebalers.com<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Cash Crops \u00b7 Flax Straw \u00b7 Textile Fibre Supply Europe’s Oldest Textile Fibre Crop \u2014 and Why Field Retting Still Defines Quality How Belgian, French, and Belarusian flax producers bale and deliver linen fibre straw \u2014 retting timing, moisture targets, and the bale specifications that determine factory acceptance. Flax Straw and the Global Linen Industry: A Supply Chain Under Pressure Linen textile production from flax (Linum usitatissimum) is one of the world’s oldest industries, with archaeological evidence of linen weaving in ancient Egypt, Mesopotamia, and China dating back 5,000 years. In 2025, global linen fabric production is concentrated in Belgium and France (the primary European flax-growing and processing regions), Belarus […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[24],"tags":[],"class_list":["post-822","post","type-post","status-publish","format-standard","hentry","category-applications"],"_links":{"self":[{"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/posts\/822","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/comments?post=822"}],"version-history":[{"count":2,"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/posts\/822\/revisions"}],"predecessor-version":[{"id":832,"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/posts\/822\/revisions\/832"}],"wp:attachment":[{"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/media?parent=822"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/categories?post=822"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/foragebalers.com\/ja\/wp-json\/wp\/v2\/tags?post=822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}