Companion to: Deep Research Brief: Eco Farming Materials, Inputs, and Equipment. Use the master brief's evidence-confidence scale, product data schema, and research standards (defined in Part 00: Framework, Scales, and Data Schemas).

Research window: 2019 baseline through September 2026. Record the exact access date for every source.

1. How to research this part

  • Treat all named products, companies, standards, dates, and rules as leads to verify, not facts. This brief was drafted without live research.
  • Seed lists are starting points. Expand them through supplier catalogs, standards bodies, extension trials, and plastics-industry sources.
  • Targets for this part:
    • At least 120 product records (mulch films, row covers, tarps, shade cloth, insect nets, greenhouse films, landscape fabrics) using the equipment record (Part 00, 4.2) for durable goods and the input record (4.1) for consumable films where suitable.
    • At least 40 structure records (high tunnels, caterpillar tunnels, low tunnel systems, greenhouses, rain shelters) with dimensions, snow and wind ratings, and prices.
    • At least 40 study records (biodegradable mulch performance and degradation, microplastics in soil, tunnel economics, row cover yield effects).
    • At least 20 regulation and standard records (NOP rules on plastic and biodegradable mulch, EU and national plastic rules, EN 17033, extended producer responsibility schemes, high tunnel zoning and tax cases).
    • At least 25 company records.
    • At least 15 recycling and collection program records.
  • Discovery methods:
    • Supplier catalogs: Johnny's Selected Seeds, FarmTek/Growers Supply, Rimol Greenhouse Systems, Ledgewood Farm Greenhouse Frames, Clearspan, Haygrove, Farmers Friend, Nolt's Produce Supplies, Dubois Agrinovation, Hummert International, Griffin Greenhouse Supplies, GrowSpan, Zimmerman's Horticultural Supply, Paul Boers (Canada), Filclair and Richel (France), Haygrove (UK), First Tunnels (UK), Keder Greenhouses (UK), Northern Polytunnels (UK) — verify.
    • Standards: CEN EN 17033 (biodegradable mulch films), ISO 17088, ASTM D6400 and D5988, TÜV Austria "OK biodegradable SOIL," NF T 51-800 (home compost), and EU Single-Use Plastics Directive and Packaging and Packaging Waste Regulation (PPWR) relevance (verify).
    • Research programs: Washington State University and University of Tennessee biodegradable mulch team (USDA SCRI project "Performance and Adoptability of Biodegradable Plastic Mulch" — verify leads such as Debra Inglis, Carol Miles, Markus Flury, Doug Hayes), Penn State Center for Plasticulture, Cornell, University of Kentucky and University of New Hampshire high tunnel research, UC ANR, ADAS and AHDB (UK), INRAE (France), Wageningen (Netherlands).
    • Plastics recycling: APE Europe (Agriculture Plastics Environment), ADIVALOR (France), Farm Plastics Recycling Europe, Cleanfarms (Canada), Revolution Plastics (US), Delta Plastics (US, Revolution — verify), Plastic Film Recyclers, Recycle Rewards, UK Farm Plastics Recycling schemes (Agricultural Plastics Recycling Group — verify), Australia's Drum Muster and future ag-plastics stewardship programs (verify).
  • Separate claimed from measured: record claimed lifespan (years of UV stability), claimed degradation times, and light transmission values, then independent test results and field degradation findings.

2. Framing questions

  • When does plastic improve soil health outcomes (less tillage, fewer herbicides, water savings) and when does it harm them (residue, microplastics, runoff, disposal burden)?
  • What are the realistic lifespans, reuse rates, and end-of-life options for each material?
  • How do costs per acre and per season compare when you include labor for laying and removal and disposal fees?
  • Which materials are allowed in certified organic production under NOP, EU, UK, Canada, and other rules?
  • How do climate and scale change the right choice (cold short seasons, hot deserts, humid tropics, windy sites)?

3. Plastic mulch films

3.1 Types to profile

  • Black polyethylene (PE) mulch, embossed vs. smooth, thickness (for example, 0.6–1.25 mil / 15–32 microns).
  • White-on-black, silver/metallized reflective (aphid and thrips repellence; research on reflective mulch and virus reduction — verify), IRT (infrared transmitting) green or brown films, clear films for soil warming and solarization.
  • Totally impermeable films (TIF) and virtually impermeable films (VIF) used with fumigants in conventional agriculture (context).
  • Perforated or pre-punched mulch for market gardens.

3.2 Seed suppliers and manufacturers (verify)

  • US: Berry Global (AEP), Robert Marvel Plastic Mulch (Pennsylvania), Nolt's, Crop Production Services (Nutrien), Poly-West (verify), Ken-Bar (verify), Filmtech/PolyExpert (Canada), Imaflex (Canada; metallized mulch).
  • EU and elsewhere: Plastika Kritis (Greece), Ginegar Plastic Products (Israel), Polysack/Plastika (Israel shade and nets), BPI Visqueen (UK; RPC/Berry), Armando Alvarez Group (Spain), Trioplast (Sweden), Barbier Group (France).

3.3 Research topics

  • Yield and earliness gains for warm-season crops (tomatoes, peppers, melons, squash) vs. bare ground and organic mulch.
  • Water savings with drip under plastic; runoff from plastic-covered beds (erosion and pesticide runoff research in Florida and the Chesapeake Bay region — verify).
  • Removal labor, retrievers and mulch lifters (Part 04–05 equipment), and disposal costs.
  • Residue left in fields: "plastic mulch residue" studies in China (film residue accumulation after decades of use in Xinjiang and North China Plain — verify), Spain (Almería), and US.
  • Organic rules: NOP permits plastic mulch if removed at end of growing or harvest season, and prohibits PVC as mulch or row cover (verify 7 CFR 205.206(c)(6) and 205.601(b)(2)); EU organic rules on plastic mulch (verify).

4. Biodegradable and compostable mulch films

4.1 Material types

  • Starch-based blends with PBAT (for example, Mater-Bi by Novamont — note Novamont acquisition by Versalis/Eni in 2023, verify).
  • PLA/PBAT blends, PHA-based films (Danimer Scientific — verify financial status and 2025 bankruptcy reports), and cellulose films.
  • Oxo-degradable films: banned in the EU under the Single-Use Plastics Directive (2019/904) — verify scope for agricultural films; explain why they fragment into microplastics rather than biodegrade.
  • Paper mulch (WeedGuardPlus — verify), paper-based seed tapes, and hydromulch/sprayable mulches (research at University of Tennessee, Penn State, and others on sprayable biodegradable mulch — verify).
  • Cotton, jute, hemp, and wool mulch mats; coconut coir mats; "Bio360" and other brands (verify).

4.2 Seed brands (verify)

  • BioAgri (Mater-Bi, by BioBag Americas / Novamont), Organix Solutions / Organix Ag film, Ecovio M (BASF), Bio360 (Dubois Agrinovation), Biotelo (Dubois / Novamont — verify), Naturecycle (Novamont — verify), Mater-Bi Bioflex, Sphere/Barbier biodegradable films (France), Polytiva (UK/Italy — verify), TIANAN / Kingfa (China) biodegradable films.

4.3 Certification and organic status

  • NOP: In 2014 the NOP added "biodegradable biobased mulch film" to the National List with requirements (meets ASTM D6400 or EN 13432 or ISO 17088; 100% biobased content per ASTM D6866; no organisms or feedstock from GMOs). In practice, no commercial film met the 100% biobased requirement for years, so they could not be used in certified organic US production (verify). Research NOSB discussions 2021–2026 about changing the biobased content annotation and any petition outcomes (verify status as of September 2026).
  • EU and UK: biodegradable mulch generally allowed in organic under national certifier interpretation; EN 17033 as the key standard (verify).
  • Canada: Canadian Organic Standards (CAN/CGSB-32.311) PSL entry on biodegradable films (verify).
  • Research the PFAS and additive content of films and whether certifications test for them.

4.4 Research topics and evidence

  • Field degradation rates by climate: WSU (Mount Vernon, maritime) vs. University of Tennessee (Knoxville, humid subtropical) vs. Texas (semi-arid) results; residual fragments after 1–4 years (verify specific studies).
  • Soil health, microbial, and earthworm effects of residues (grade carefully; many studies short-term).
  • Yield comparisons with PE film.
  • Cost per acre: film cost is often 2–3 times PE, offset by removal and disposal savings (verify current ratios and include labor).
  • Machine laying issues: tearing, premature breakdown in hot climates, storage life of rolls.
  • Deliverable: decision table of PE vs. biodegradable vs. paper vs. organic mulch by climate, crop, and certification status.
  • Straw and hay (weed seed and herbicide residue risks), wood chips and ramial chips, leaves, compost mulch, cardboard, and sheet mulching.
  • Deep-straw systems in no-till market gardens and "hay mulch" for potatoes and garlic.
  • Living mulches: white clover between rows, Dutch white clover in orchards, grass alleys in vineyards.
  • Labor and machinery for spreading (manure spreaders, straw blowers, bale choppers — cross-reference Part 04–05).
  • Evidence: vole and slug problems, soil cooling effects in short seasons, N immobilization, and water conservation in arid climates.

6. Silage tarps, occultation tarps, and landscape fabric

  • Silage tarps (black/white, typically 5–6 mil / 125–150 micron) used for occultation in no-till market gardens. Research lifespan (commonly cited 5–10 years — verify), UV resistance, weight (sandbag needs), and wind damage.
    • Seed sources: Johnny's, Farmers Friend, Nolt's, Up North Plastics (verify), Raven/Raven Industries, SiloStop (Italy — verify), Sealtite.
    • Evidence: University of Maine, Cornell, and Michigan State tarping research; impacts on weed seedbank, soil temperature and moisture, nitrogen availability, and slug/vole populations.
  • Clear plastic for solarization (typically 1–2 mil; research in California, Florida, and Mediterranean regions on timing and temperature thresholds).
  • Landscape fabric (woven polypropylene, 3.2–5 oz): burned-hole templates for market gardens, lifespan, and microplastic shedding concerns (verify research on woven fabric fragmentation).
  • End-of-life issues: tarps are hard to recycle when dirty; research take-back programs.

7. Row covers and low tunnels

7.1 Materials

  • Spunbonded polypropylene row covers in weights from insect barrier (0.3–0.5 oz/yd², about 10–17 g/m²) to frost protection (1.0–2.0 oz/yd², about 34–68 g/m²). Light transmission and degrees of frost protection claimed per weight (verify against independent tests).
  • Brands (verify): Agribon+ (Berry Global), Covertan (Hygiene Group — verify), Typar/Reemay (history), Novagryl (Fiberweb/Berry), Lutrasil (Freudenberg, Germany — verify), Tierra Verde, Frost-Tex, DeWitt N-Sulate, Gardeners Supply (retail).
  • Insect netting (cross-reference Part 02): ProtekNet, Culticlean, Enviromesh.
  • Shade cloth: knitted HDPE in 30–70% shade, aluminet reflective shade (Ludvig Svensson, Polysack/Plastika, Green-Tek, FarmTek).

7.2 Low tunnel systems

  • Wire hoops (9-gauge galvanized), EMT conduit hoops with benders (Johnny's Quick Hoops, Hoss Tools, Bender Board — verify), fiberglass hoops, and caterpillar tunnels.
  • Research on low tunnels for strawberries (University of Minnesota and Kansas State day-neutral strawberry low tunnel research — verify), and winter spinach production.
  • Wind and snow failures; anchoring (sandbags, pins, ground staples).

7.3 Evidence

  • Yield and earliness effects of row covers in cold climates; pest exclusion in organic brassicas and cucurbits (with pollination timing issues).
  • Heat buildup risks and ventilation.
  • Lifespan (often one to three seasons) and waste volume.

8. High tunnels, caterpillar tunnels, and greenhouses

8.1 Structure types

  • Gothic vs. Quonset (round) high tunnels; ground-to-ground vs. straight sidewall; single vs. double poly with inflation blowers.
  • Caterpillar tunnels (walk-in, rope-tensioned, no end walls).
  • Multi-bay/gutter-connected tunnels; Haygrove-style multi-span tunnels for berries and cherries.
  • Movable tunnels (on rails or skids) to rotate soil and manage salt/pest buildup (research on Rimol, Ledgewood, and farmer-built rolling tunnels — verify).
  • Greenhouses: polycarbonate, glass, retractable-roof (Cravo Equipment, Canada — verify), and passive solar/Chinese-style greenhouses (research at University of Minnesota and in China).
  • Walipinis (pit greenhouses), "deep winter" greenhouses (University of Minnesota Extension — verify), and geothermal "climate battery" greenhouses (Ceres Greenhouse Solutions — verify).

8.2 Seed suppliers (verify)

  • US: Rimol Greenhouse Systems, Ledgewood Farm Greenhouse Frames, Clearspan (Hummert/Tractor Supply partnerships — verify), GrowSpan, FarmTek, Atlas Manufacturing, Stuppy, Nexus, X.S. Smith, Zimmerman, Tunnel Vision Hoops (verify), Farmers Friend (caterpillar tunnels), Johnny's Gothic tunnels, Bootstrap Farmer, Growers Solution, Poly-Tex.
  • Canada: Harnois, Les Serres Guy Tessier (verify), Dubois Agrinovation, Cravo.
  • Europe and UK: Haygrove, Filclair, Richel, Agrotunnel, First Tunnels, Keder, Northern Polytunnels, Solartunnels.
  • Australia/NZ: Redpath, Gro-Master (verify).

8.3 Research topics

  • Snow and wind load ratings, engineering certifications, and failure modes (bows collapse under wet snow; research on gothic vs. round).
  • Ventilation: roll-up sides, drop-down sides, end-wall vents, motorized vents, and automatic controllers (Wadsworth, Micro Grow, AutoGrow — verify).
  • Heating options: none (cold hardy crops), propane, wood, biomass, heat pumps, compost heat recovery (Jean Pain method; research claims), and thermal mass.
  • Soil issues in tunnels: salt buildup, nutrient management, irrigation needs, and pest buildup (mites, aphids).
  • Climate adaptation uses: rain shelters for tomatoes in humid regions, hail protection, and heat protection with shade cloth.
  • Evidence: NRCS high tunnel initiative outcomes and farmer surveys (verify NRCS or university evaluations of Practice 325 contract outcomes), University of Kentucky and Kansas State high tunnel budgets.
  • Regulation and funding (detail in Part 08):
    • NRCS EQIP Practice 325 High Tunnel System payment rates by state (verify 2025–2026 rates and any caps; historic 2,178 sq ft cap removed or changed — verify).
    • Property tax and building code treatment of hoop houses (for example, state laws exempting temporary structures, local zoning disputes — verify examples).
    • UK and EU planning permission rules for polytunnels.

9. Greenhouse films and glazing

  • Polyethylene greenhouse films: 4-year and 6-year UV-stabilized, IR/thermic additives, anti-condensate/anti-drip, diffused light films, UV-blocking films (to disrupt insects and fungal sporulation — verify research), photo-selective and luminescent films.
  • Brands (verify): K50 Clear, Tufflite IV (Berry Global/AT Plastics), Sun Master (Ginegar), Lumisol (British Polythene/BPI — verify), Dura-Film (AT Films), Klerk's Hyplast/Luminance (Belgium), Polyon Barkai (Israel), Agriplast (Italy), Solawrap (Solar EVA / Bubble film — verify).
  • Polycarbonate twin-wall and glass: lifespan, light transmission loss over time, insulation values.
  • End-of-life: greenhouse film recycling programs (US state programs, APE Europe, ADIVALOR), contamination (soil, pesticide residues, tape), and costs to farmers.

10. Other farm plastics

  • Drip tape and drip line: single-season vs. multi-year thin-walled products; recycling challenges. (Irrigation detail in Part 06.)
  • Plant pots, trays, and plug flats: reusable heavy-duty trays (Bootstrap Farmer, Winstrip — verify), soil blocking as a plastic-free alternative (Ladbrooke soil blockers — verify), paperpot chains (Nitten/Japan, Paperpot Co. — cross-reference Part 04).
  • Twine, bale wrap, silage films and net wrap; recycling issues for livestock farms.
  • Greenhouse and tunnel ground cover, weed barrier, and irrigation fittings.
  • Coated/controlled-release fertilizers (polymer-coated) and the EU FPR biodegradability requirement for coating polymers starting in 2026 (verify implementation date and details).
  • Seed coatings with microplastics (EU REACH restriction on intentionally added microplastics, adopted 2023, with transition periods for seed treatments and controlled-release fertilizers — verify dates).
  • Plastic tree guards and vineyard grow tubes (biodegradable alternatives; cleanup programs in UK hedgerow planting schemes — verify).

11. Microplastics and plastic residues in agricultural soils

  • Research topics:
    • Sources: mulch film fragments, biosolids and compost contamination, coated fertilizers, irrigation water, tire wear, tarps, and landscape fabric.
    • Measurement methods and why reported concentrations vary widely.
    • Effects on soil structure, water movement, microbial communities, earthworms, and crop uptake (grade carefully; many lab studies use unrealistic doses).
    • Additives: phthalates, UV stabilizers, and PFAS in plastics.
  • Key reports and research leads (verify):
    • FAO 2021 report "Assessment of Agricultural Plastics and Their Sustainability: A Call for Action."
    • UNEP reports and the Global Plastics Treaty negotiations (INC process; status after the 2025 sessions — verify outcomes).
    • EU MINAGRIS project on micro- and nano-plastics in agricultural soils (Horizon 2020 — verify).
    • Studies from China on film residue and the 2020 national standard for mulch film thickness and recovery (GB 13735-2017 raised minimum thickness to 0.01 mm — verify).
    • Research by Markus Flury (WSU) and colleagues on biodegradable mulch fragments.
  • Deliverable: an evidence summary that separates measured soil concentrations, lab effect studies, and field outcomes.

12. Recycling, collection, and extended producer responsibility (EPR)

  • US: patchy programs by state; research California's SB 54 (2022) packaging EPR and whether agricultural films are included (verify); state ag-plastic recycling pilots (New York, Pennsylvania, Wisconsin, Vermont — verify); private recyclers such as Revolution (formerly Delta Plastics, Arkansas), Plastic Recycling Inc., and EcoFarm Plastic (verify).
  • Canada: Cleanfarms programs and Saskatchewan's regulated grain bag recycling program (verify), Manitoba and Quebec programs.
  • EU: national EPR schemes for agricultural plastics (France ADIVALOR, Ireland Farm Relief/IFFPG, Spain Maspoma — verify), Ireland's statutory farm film recycling scheme, and APE Europe data on collection rates.
  • UK: voluntary schemes and proposed EPR for agricultural plastics (verify DEFRA status).
  • Australia: proposed ag-plastics stewardship.
  • Global South: collection gaps, open burning, and research on mulch film use in China, India, and Africa.
  • Research: collection rates, costs to farmers per tonne, cleanliness requirements, and markets for recycled film (for example, plastic lumber, trash bags).

13. Climate, scale, and crop suitability

  • Cold climates (Maine, Minnesota, Canadian prairies, Scandinavia): high tunnels, double row covers, IRT mulch, caterpillar tunnels vs. snow load.
  • Hot arid climates (Arizona, Israel, Spain, Middle East): shade cloth, white/silver mulch, evaporation reduction, film degradation from UV.
  • Humid tropics (Southeast Asia, West Africa, Central America): rain shelters, insect netting houses (nethouses), ventilation, film lifespan under high UV.
  • Windy regions: anchoring systems, shelterbelts.
  • Smallholders: low-cost tunnels in Kenya and India (verify programs promoting nethouses, e.g., World Vegetable Center — verify), and bamboo structures.
  • Urban farms: rooftop structures and building code requirements.

14. Economics

  • Cost per acre per season: PE mulch (film, laying, removal, disposal), biodegradable mulch (film, laying, tilling in), paper mulch, straw mulch (bales and labor), silage tarp amortized over years.
  • High tunnel budgets: construction cost per square foot (with and without labor), crop revenue per square foot (tomatoes, greens), payback periods (verify university budgets, e.g., University of Kentucky, Penn State, University of Missouri).
  • Caterpillar tunnel vs. high tunnel vs. low tunnel cost and value comparison.
  • Insurance and disaster risk (storm damage coverage; NAP and Whole-Farm Revenue Protection).
  • Price trends 2019–2026: resin prices, shipping costs, tariffs on imported steel and film (verify 2025–2026 US tariff effects on greenhouse steel and plastic products).

15. Case studies to investigate (verify)

  • A market garden using silage tarps and no-till beds (for example, farms featured by Jesse Frost/No-Till Growers or Curtis Stone — verify their published methods).
  • A diversified farm that switched from PE to biodegradable mulch and its cost and residue results.
  • A community-scale ag-plastic recycling program (for example, in New York or Ireland).
  • A farm that lost tunnels to snow or wind and redesigned.
  • A cold-climate winter greens operation using unheated high tunnels (for example, Eliot Coleman's Four Season Farm methods — verify).
  • A tropical nethouse program for smallholders.
  • A company making biodegradable films that failed or went bankrupt (verify Danimer Scientific status and others).

Deliverables for Part 03

  • Mulch, film, cover, and season-extension materials guide.
  • At least 120 product records and 40 structure records.
  • Decision table: plastic vs. biodegradable vs. paper vs. organic mulch by climate, crop, scale, and certification status.
  • Organic certification status summary for films and covers (NOP, EU, UK, Canada, others).
  • Row cover and netting comparison table (weight, mesh, light transmission, frost protection, lifespan, price).
  • High tunnel and greenhouse comparison table with load ratings and price per square foot.
  • Microplastics evidence summary.
  • Recycling and EPR program directory by region.
  • Cost-per-acre and payback tables.
  • Open questions and conflicting evidence list.

Research standards

  • Record the exact research date and access dates.
  • Treat named brands, standards, and rules as leads to verify.
  • Prefer standards bodies, regulators, certifiers, extension trials, peer-reviewed research, and manufacturer technical data sheets.
  • Separate claimed lifespans, degradation times, and light transmission from independent measurements.
  • Distinguish lab microplastics studies from field outcomes.
  • Note how results vary by climate, UV exposure, soil, and scale.
  • Always advise checking materials with the farm's certifier before use.
  • Cover low-cost and smallholder options, not only premium structures.