EcoPlanet Bio-degradable Agricultural Plasticulture Black Mulch Film Gardening Farming Film, Type C - 1 Year degradation Time (1 Year, 1.25 Mil, 4 feet x 2400 feet) &#10004;1.25 Mil Thickness to prevent weeding. ecoPlanet [Type C] biodegradable film -- estimated degradation time to be 1 Year. (Actual degradation time depend on sun shine, temparuture, humidity and local soil condition). &#10004;Photo degradable & Biodegradable. 50% bio-based raw materials tested 90% biodegradability after 120 days of burial (Testing Standard: ISO 14855). Sun shine will crack the mulch first. Once mulch film touch the soil, the bio mass material start to trigger microbe in the soil to decompose the mulch until disapear. &#10004;Made from natural organic materials from ocean. SGS tests for food grade safe, NO lead, mercury, cadmium, & 8 heavy metals. Unlike other cheminal based mulch film which will poison the soil and only become smaller plastic which create bigger eco problem. &#10004;Decomposed to CaO + CO2 + H2O, Do NOT create Methane like corn starch based biodegradable materials which will cause global warming. Become nature fertilizer after decomposed. Neutralize PH value of the earth. &#10004;4 ft wide machinable with 2 inches diameter hard core, Keep soil temp 5~10 degree warmer to promote root growth, preserve earth moisture level, and prevent early weeding. Width:4 ft, Length: 2400 ft, cover 1/3 acre farm land (with 66% coverage)