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Sheet mulching

In permaculture, sheet mulching is an agricultural no-dig gardening technique that attempts to mimic the natural soil-building process in forests. When deployed properly and in combination with other permaculture principles, it can generate healthy, productive, and low maintenance ecosystems.[1][2]

Sheet mulching, also known as composting in place, mimics nature by breaking down organic material from the topmost layers down. The simplest form of sheet mulching consists of applying a bottom layer of decomposable material, such as cardboard or newspapers, to the ground to kill existing vegetation and suppress weeds. Then, a top layer of organic mulch is applied. More elaborate sheet mulching involves more layers. Sheet mulching is used to transform a variety of surfaces into a fertile soil that can be planted. Sheet mulching can be applied to a lawn, a dirt lot full of perennial weeds, an area with poor soil, or even pavement or a rooftop.[3]

Technique edit

 
Typical layers of natural soil.

A model for sheet mulching consists of the following steps:[1][3]

  1. The area of interest is flattened by trimming down existing plant species such as grasses.
  2. The soil is analyzed and its pH is adjusted (if needed).
  3. The soil is moisturized (if needed) to facilitate the activity of decomposers.
  4. The soil is then covered with a thin layer of slowly decomposing material (known as the weed barrier), typically cardboard. This suppresses the weeds by blocking sunlight, adds nutrients to the soil as weed matter quickly decays beneath the barrier, and increases the mechanical stability of the growing medium.
  5. A layer (around 10 cm thick) of weed-free soil, rich in nutrients is added, in an attempt to mimic the surface soil, or A horizon.[4]
  6. A layer (at most 15 cm thick) of weed-free, woody and leafy matter is added in an attempt to mimic the forest floor, or O horizon. Theoretically, the soil is now ready to receive the desirable plant seeds or transplants.[5]

Variations and considerations edit

  • Often the barrier is applied a few months before planting to ensure the penetration of roots of newly planted seeds.[3]
  • Very thick barriers can cause anaerobic conditions.
  • Some permaculturists incorporate composting in steps 5 and/or 6.[3]
  • Sheets of newspaper and clothing can be used instead of cardboard.[3]
  • Before step 4, an initial layer (2–3 kg/m2) of matter rich in nutrients (such as compost or manure) may be added to bolster decomposition.[1]
  • Some varieties of grasses and weeds may be beneficial in a number of ways. Such plants can be controlled and used rather than eradicated.[1] See also: mulch, list of beneficial weeds.
  • One variation of mulching, called Hügelkultur, involves using buried logs and branches as the first layer of the bed.[6]

Advantages edit

Sheet mulch has important advantages relative to conventional methods, such as tilling, plowing or applying herbicides:

  • Improvement of desirable plants' health and productivity.[1]
  • Retention of water and nutrients and stabilization of biochemical cycles.[1]
  • Improvement of soil structure, soil life, and prevention of soil erosion.[1][7]
  • Avoidance of potentially dangerous pesticides, especially herbicides.[8][9]
  • Reduction of overall maintenance labor and costs.[7]
  • Most of the materials required to sheet mulch can be collected at no cost, and materials can be substituted for those readily available in certain areas. For instance, suburban areas may have a plentiful supply of leaves, and farming communities may have spoiled hay and manure.[3]

Disadvantages edit

  • Some weed seeds (such as those of Bermuda grass and species of bindweed) may persist under the barrier and within the soil seed bank.[3]
  • Termites are attracted to the area. While they are a natural part of the ecosystem that transforms the weed barrier into rich soil, they can pose a hazard to nearby wood-framed structures.
  • Slug populations may increase during the early stages of decomposition. However they can be kept away or harvested.[3]
  • The system may need a constant supply of organic material, at least during the early stages.[1]
  • Roaming animals may interrupt the sheet mulching process.[1]

See also edit

References edit

  1. ^ a b c d e f g h i Elevitch, Craig; Wilkinson, Kim (1998). . Agroforestry.net. Archived from the original on December 10, 2002. Retrieved November 9, 2011.
  2. ^ Mason, John (2003). Sustainable Agriculture (Second ed.). Collingwood, Vic.: CSIRO. ISBN 978-0-643-06876-6.
  3. ^ a b c d e f g h Hemenway, Toby (2009). Gaia's Garden: A Guide to Home-Scale Permaculture (2nd ed.). White River Junction, Vt.: Chelsea Green Pub. ISBN 978-1-60358-029-8.
  4. ^ Łachacz, Andrzej; Kalisz, Barbara; Sowiński, Paweł; Smreczak, Bożena; Niedźwiecki, Jacek (March 2023). "Transformation of Organic Soils Due to Artificial Drainage and Agricultural Use in Poland". Agriculture. 13 (3): 634. doi:10.3390/agriculture13030634. ISSN 2077-0472.
  5. ^ Stout, Ruth (February–March 2004). "Ruth Stout's System". Mother Earth News. Retrieved November 9, 2011.
  6. ^ Nicole Faires (4 May 2012), The Ultimate Guide to Permaculture, Skyhorse Publishing Inc., p. 228, ISBN 978-1-62087-316-8, retrieved 3 July 2012
  7. ^ a b . StopWaste.Org. Archived from the original on October 1, 2011. Retrieved November 9, 2011.
  8. ^ Phelps, Dave R. (2013). "Use of Less-Toxic Herbicides and Sheet Mulching in Landscapes". 2013 CWSS Proceedings. Annual Conference. California: California Weed Science Society.
  9. ^ "Sheet Mulching from the Ground Up". Water Conservation Program. City of Santa Barbara. March 11, 2014. Retrieved May 8, 2022.

sheet, mulching, this, article, about, mulching, permaculture, similar, more, general, technique, mulch, permaculture, sheet, mulching, agricultural, gardening, technique, that, attempts, mimic, natural, soil, building, process, forests, when, deployed, proper. This article is about mulching in permaculture For the similar but more general technique see Mulch In permaculture sheet mulching is an agricultural no dig gardening technique that attempts to mimic the natural soil building process in forests When deployed properly and in combination with other permaculture principles it can generate healthy productive and low maintenance ecosystems 1 2 Sheet mulching also known as composting in place mimics nature by breaking down organic material from the topmost layers down The simplest form of sheet mulching consists of applying a bottom layer of decomposable material such as cardboard or newspapers to the ground to kill existing vegetation and suppress weeds Then a top layer of organic mulch is applied More elaborate sheet mulching involves more layers Sheet mulching is used to transform a variety of surfaces into a fertile soil that can be planted Sheet mulching can be applied to a lawn a dirt lot full of perennial weeds an area with poor soil or even pavement or a rooftop 3 Contents 1 Technique 2 Variations and considerations 3 Advantages 4 Disadvantages 5 See also 6 ReferencesTechnique edit nbsp Typical layers of natural soil A model for sheet mulching consists of the following steps 1 3 The area of interest is flattened by trimming down existing plant species such as grasses The soil is analyzed and its pH is adjusted if needed The soil is moisturized if needed to facilitate the activity of decomposers The soil is then covered with a thin layer of slowly decomposing material known as the weed barrier typically cardboard This suppresses the weeds by blocking sunlight adds nutrients to the soil as weed matter quickly decays beneath the barrier and increases the mechanical stability of the growing medium A layer around 10 cm thick of weed free soil rich in nutrients is added in an attempt to mimic the surface soil or A horizon 4 A layer at most 15 cm thick of weed free woody and leafy matter is added in an attempt to mimic the forest floor or O horizon Theoretically the soil is now ready to receive the desirable plant seeds or transplants 5 Variations and considerations editOften the barrier is applied a few months before planting to ensure the penetration of roots of newly planted seeds 3 Very thick barriers can cause anaerobic conditions Some permaculturists incorporate composting in steps 5 and or 6 3 Sheets of newspaper and clothing can be used instead of cardboard 3 Before step 4 an initial layer 2 3 kg m2 of matter rich in nutrients such as compost or manure may be added to bolster decomposition 1 Some varieties of grasses and weeds may be beneficial in a number of ways Such plants can be controlled and used rather than eradicated 1 See also mulch list of beneficial weeds One variation of mulching called Hugelkultur involves using buried logs and branches as the first layer of the bed 6 Advantages editSheet mulch has important advantages relative to conventional methods such as tilling plowing or applying herbicides Improvement of desirable plants health and productivity 1 Retention of water and nutrients and stabilization of biochemical cycles 1 Improvement of soil structure soil life and prevention of soil erosion 1 7 Avoidance of potentially dangerous pesticides especially herbicides 8 9 Reduction of overall maintenance labor and costs 7 Most of the materials required to sheet mulch can be collected at no cost and materials can be substituted for those readily available in certain areas For instance suburban areas may have a plentiful supply of leaves and farming communities may have spoiled hay and manure 3 Disadvantages editSome weed seeds such as those of Bermuda grass and species of bindweed may persist under the barrier and within the soil seed bank 3 Termites are attracted to the area While they are a natural part of the ecosystem that transforms the weed barrier into rich soil they can pose a hazard to nearby wood framed structures Slug populations may increase during the early stages of decomposition However they can be kept away or harvested 3 The system may need a constant supply of organic material at least during the early stages 1 Roaming animals may interrupt the sheet mulching process 1 See also edit nbsp Gardening portalAgroecology Ecoagriculture Ecological design Ecosystem approach Forest gardeningReferences edit a b c d e f g h i Elevitch Craig Wilkinson Kim 1998 Sheet Mulching Greater Plant and Soil Health for Less Work Agroforestry net Archived from the original on December 10 2002 Retrieved November 9 2011 Mason John 2003 Sustainable Agriculture Second ed Collingwood Vic CSIRO ISBN 978 0 643 06876 6 a b c d e f g h Hemenway Toby 2009 Gaia s Garden A Guide to Home Scale Permaculture 2nd ed White River Junction Vt Chelsea Green Pub ISBN 978 1 60358 029 8 Lachacz Andrzej Kalisz Barbara Sowinski Pawel Smreczak Bozena Niedzwiecki Jacek March 2023 Transformation of Organic Soils Due to Artificial Drainage and Agricultural Use in Poland Agriculture 13 3 634 doi 10 3390 agriculture13030634 ISSN 2077 0472 Stout Ruth February March 2004 Ruth Stout s System Mother Earth News Retrieved November 9 2011 Nicole Faires 4 May 2012 The Ultimate Guide to Permaculture Skyhorse Publishing Inc p 228 ISBN 978 1 62087 316 8 retrieved 3 July 2012 a b Sheet Mulching StopWaste Org Archived from the original on October 1 2011 Retrieved November 9 2011 Phelps Dave R 2013 Use of Less Toxic Herbicides and Sheet Mulching in Landscapes 2013 CWSS Proceedings Annual Conference California California Weed Science Society Sheet Mulching from the Ground Up Water Conservation Program City of Santa Barbara March 11 2014 Retrieved May 8 2022 Retrieved from https en wikipedia org w index php title Sheet mulching amp oldid 1183222144, wikipedia, wiki, book, books, library,

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