Agroforestry

Agroforestry (or agro-sylviculture) is a land use management system in which combinations of trees or shrubs are grown around or among crops or pastureland.^[1] Agroforestry combines agricultural and forestry technologies to create more diverse, productive, profitable, healthy, and sustainable land-use systems. There are many benefits to agroforestry such as increasing farm profitability.^[2] In addition, agroforestry helps to preserve and protect natural resources such as controlling soil erosions, creating habitat for the wildlife, and managing animal waste.^[3] Benefits also include increased biodiversity, improved soil structure and health, reduced erosion, and carbon sequestration.^[4]

Corn and chestnut

Agroforestry in Burkina Faso: maize grown under Faidherbia albida and Borassus akeassii near Banfora

Trees in agroforestry systems can also produce wood, fruits, nuts, and other useful products with economic and practical value. Agroforestry practices are especially prevalent in the tropics,^[5][6] especially in subsistence smallholdings areas ^[7] with particular importance in sub-Saharan Africa.^[8] Due to its multiple benefits, for instance in nutrient cycle benefits and potential for mitigating droughts, it has been adopted in the USA and Europe .^[9][10][11]

Agroforestry shares principles with polyculture practices such as intercropping but can also involve much more complex multi-strata agroforests containing hundreds of species. Agroforestry can also utilise nitrogen-fixing plants such as legumes to restore soil nitrogen fertility. The nitrogen-fixing plants can be planted either sequentially or simultaneously.

Agroforestry contour planting integrated with animal grazing on Taylor's Run farm, Australia

Scientific basis

According to Paul Wojtkowski, the theoretical base for agroforestry lies in ecology,^[12] or agroecology. Agroecology encompasses diverse applications such as: improved nutrient and carbon cycling; water retention of soils; biodiverse habitats; protection from pest, disease and weed outbreaks; protection of soils from water and wind erosion, etc.^[13] From this perspective, agroforestry is one of the three principal agricultural land-use sciences. The other two are agriculture and forestry.^[14]

There is still not enough data to determine the full range of the impacts and benefits varying agroforestry practices could have. The indigenous practices that form the inspiration and basis for agroforestry are frequently complex, including a large array of species.^[15] The most studied agroforestry practices involve a simple interaction between two components, such as simple configurations of hedges or trees integrated with a single crop.^[16] There is significant variation in agroforestry systems and the benefits they have.^[17] Agroforestry as understood by modern science is derived from traditional indigenous and local practices, developed by living in close association with ecosystems for many generations.^[18] Although these agroforestry practices have sometimes been excluded from consideration as part of the "scientific" theory and practice of agroforestry, they form the foundation for modern agroforestry, and have enduring potential for future study and application.^[15]

Benefits

Agroforestry systems can be advantageous over conventional agricultural and forest production methods. They can offer increased productivity; social, economic and environmental benefits, as well as greater diversity in the ecological goods and services provided.^[19] It is essential to note that these benefits are conditional on good farm management. This includes choosing the right trees, as well as pruning them regularly etc. ^[8]

Biodiversity

Biodiversity in agroforestry systems is typically higher than in conventional agricultural systems. Two or more interacting plant species in a given area create a more complex habitat that can support a wider variety of fauna.

Agroforestry is important for biodiversity for different reasons. It provides a more diverse habitat than a conventional agricultural system in which the tree component creates ecological niches for a wide range of organisms both above and below ground. The life cycles and food chains associated with this diversification initiates an agroecological succession that creates functional agroecosystems that confer sustainability. Tropical bat and bird diversity for instance can be comparable to the diversity in natural forests.^[20] Although agroforestry systems do not provide as many floristic species as forests and do not show the same canopy height, they do provide food and nesting possibilities. A further contribution to biodiversity is that the germplasm of sensitive species can be preserved.^[21] As agroforests have no natural clear areas, habitats are more uniform. Furthermore, agroforests can serve as corridors between habitats. Agroforestry can help to conserve biodiversity having a positive influence on other ecosystem services.^[21]

Soil and plant growth

Depleted soil can be protected from soil erosion by groundcover plants such as naturally growing grasses in agroforestry systems. These help to stabilise the soil as they increase cover compared to short-cycle cropping systems.^[22][23] Soil cover is a crucial factor in preventing erosion.^[24][25] Cleaner water through reduced nutrient and soil surface runoff can be a further advantage of agroforestry. Trees can help reduce water runoff by decreasing water flow and evaporation and thereby allowing for increased soil infiltration.^[26] Compared to row-cropped fields nutrient uptake can be higher and reduce nutrient loss into streams.^[27][28]

Further advantages concerning plant growth:

• Bioremediation
• Drought tolerance
• Increased crop stability

Role in sustainable agriculture

Agroforestry systems can provide a number of ecosystem services which can contribute to sustainable agriculture in the following ways;

• Diversification of agricultural products, such as fuelwood, medicinal plants, and multiple crops, increases income security^[29]
• Increased food security and nutrition by restored soil fertility, crop diversity and resilience to weather shocks for food crops^[29]
• Land restoration through reducing soil erosion and regulating water availability ^[26]
• Multifunctional site use, e.g., crop production and animal grazing
• Reduced deforestation and pressure on woodlands by providing farm-grown fuelwood
• Possibility of reduced chemicals inputs, e.g. due to improved use of fertilizer, increased resilience against pests,^[8] and increased ground cover which reduces weeds ^[30]
• Growing space for medicinal plants e.g., in situations where people have limited access to mainstream medicines

According to FAO's The State of the World’s Forests 2020, adopting agroforestry and sustainable production practices, restoring the productivity of degraded agricultural lands, embracing healthier diets and reducing food loss and waste are all actions that urgently need to be scaled up. Agribusinesses must meet their commitments to deforestation-free commodity chains and companies that have not made zero-deforestation commitments should do so.^[31]

Other environmental goals

Carbon sequestration is an important ecosystem service.^[32][21][33] Agroforestry practices can increase carbon stocks in soil and woody biomass.^[34] Trees in agroforestry systems, like in new forests, can recapture some of the carbon that was lost by cutting existing forests. They also provide additional food and products. The rotation age and the use of the resulting products are important factors controlling the amount of carbon sequestered. Agroforests can reduce pressure on primary forests by providing forest products.^[35]

Agroforestry practices may realize a number of environmental goals, such as:

• Odour, dust, and noise reduction
• Green space and visual aesthetics
• Enhancement or maintenance of wildlife habitat

Adaptation to climate change

Agroforestry can significantly contribute to climate change mitigation along with adaptation benefits.^[36] A case study in Kenya found that the adoption of agroforestry drove carbon storage and increased livelihoods simultaneously among small-scale farmers. In this case, maintaining the diversity of tree species, especially land use and farm size are important factors.^[37]

Especially in recent years, poor smallholder farmers turned to agroforestry as a means to adapt to climate change. A study from the CGIAR research program on Climate Change, Agriculture and Food Security (CCAFS) found from a survey of over 700 households in East Africa that at least 50% of those households had begun planting trees in a change from earlier practices. The trees were planted with fruit, tea, coffee, oil, fodder and medicinal products in addition to their usual harvest. Agroforestry was one of the most widespread adaptation strategies, along with the use of improved crop varieties and intercropping.^[38]

Applications

Tropical agroforestry

Research with Faidherbia albida in Zambia showed maximum maize yields of 4.0 tonnes per hectare using fertilizer and inter-cropped with these trees at densities of 25 to 100 trees per hectare,^[39] compared to average maize yields in Zimbabwe of 1.1 tonnes per hectare.^[40]

Hillside systems

A well-studied example of an agroforestry hillside system is the Quesungual Slash and Mulch Agroforestry System (QSMAS) in Lempira Department, Honduras. This region was historically used for slash-and-burn subsistence agriculture. Due to heavy seasonal floods, the exposed soil was washed away, leaving infertile barren soil exposed to the dry season.^[41] Farmed hillside sites had to be abandoned after a few years and new forest was burned. The Food and Agriculture Organization of the United Nations (FAO) helped introduce a system incorporating local knowledge consisting of the following steps:^[42][43]

1. Thin and prune Hillside secondary forest, leaving individual beneficial trees, especially nitrogen-fixing trees. They help reduce soil erosion, maintain soil moisture, provide shade and provide an input of nitrogen-rich organic matter in the form of litter.
2. Plant maize in rows. This is a traditional local crop.
3. Harvest from the dried plant and plant beans. The maize stalks provide an ideal structure for the climbing bean plants. Bean is a nitrogen-fixing plant and therefore helps introduce more nitrogen.
4. Pumpkins can be planted during this time. The plant's large leaves and horizontal growth provide additional shade and moisture retention. It does not compete with the beans for sunlight since the latter grow vertically on the stalks.
5. Every few seasons, rotate the crop by grazing cattle, allowing grass to grow and adding soil organic matter and nutrients (manure). The cattle prevent total reforestation by grazing around the trees.
6. Repeat.

Kuojtakiloyan

Kuojtakiloyan is a polyculture agroforestry system used in Mexico.

Shade crops

With shade applications, crops are purposely raised under tree canopies within the shady environment. The understory crops are shade tolerant or the overstory trees have fairly open canopies. A conspicuous example is shade-grown coffee. This practice reduces weeding costs and improves coffee quality and taste.^[44][45]

Crop-over-tree systems

Crop-over-tree systems employ woody perennials in the role of a cover crop. For this, small shrubs or trees pruned to near ground level are utilized. The purpose is to increase in-soil nutrients and/or to reduce soil erosion.

Intercropping and alley cropping

See also: Inga alley cropping

With alley cropping, crop strips alternate with rows of closely spaced tree or hedge species. Normally, the trees are pruned before planting the crop. The cut leafy material - for example, from Alchornea cordifolia and Acioa barteri - is spread over the crop area to provide nutrients. In addition to nutrients, the hedges serve as windbreaks and reduce erosion.^[46]

In tropical areas of North and South America, various species of Inga such as I. edulis and I. oerstediana have been used for alley cropping.^[47]

Intercropping is advantageous in Africa, particularly in relation to improving maize yields in the sub-Saharan region. Use relies upon the nitrogen-fixing tree species Sesbania sesban, Tephrosia vogelii, Gliricidia sepium and Faidherbia albida. In one example, a ten-year experiment in Malawi showed that, by using the fertilizer tree Gliricidia (G. sepium) on land on which no mineral fertilizer was applied, maize/corn yields averaged 3.3 metric tons per hectare (1.5 short ton/acre) as compared to 1 metric ton per hectare (0.45 short ton/acre) in plots without fertilizer trees or mineral fertilizers.^[48]

Weed control is inherent to alley cropping, by providing mulch and shade.^[46]

Taungya

Taungya is a system originating in Burma. In the initial stages of an orchard or tree plantation, trees are small and widely spaced. The free space between the newly planted trees accommodates a seasonal crop.^[49] Instead of costly weeding, the underutilized area provides an additional output and income. More complex taungyas use between-tree space for multiple crops. The crops become more shade tolerant as the tree canopies grow and the amount of sunlight reaching the ground declines. Thinning can maintain sunlight levels.

Itteri Agroforestry^[50]

Itteri agroforestry systems have been used in Tamil Nadu since time immemorial. They involve the deliberate management of multipurpose trees and shrubs grown in intimate association with herbaceous species. They are often found along village and farm roads, small gullies, and boundaries of fields.

Bamboo-based agroforestry systems (Dendrocalamus strictus + sesame–chickpea) have been studied for enhancing productivity in semi-arid tropics of central India.^[51]

Agroforestry in Africa

A project to mitigate climate change with agriculture was launched in 2019 by the "Global EverGreening Alliance". The target is to sequester carbon from the atmosphere. By 2050 the restored land should sequestrate 20 billion tons of carbon annually^[52]

Temperate agroforestry

Although originally a concept used in tropical agronomy, the USDA distinguishes five applications of agroforestry for temperate climates.^[4]

Alley cropping and strip cropping

 

Alley cropping corn fields between rows of walnut trees

Alley cropping (see above) can also be used in temperate climates. Strip cropping is similar to alley cropping in that trees alternate with crops. The difference is that, with alley cropping, the trees are in single row. With strip cropping, the trees or shrubs are planted in wide strip. The purpose can be, as with alley cropping, to provide nutrients, in leaf form, to the crop. With strip cropping, the trees can have a purely productive role, providing fruits, nuts, etc. while, at the same time, protecting nearby crops from soil erosion and harmful winds.

Fauna-based systems

 

Silvopasture over the years (Australia)

Trees can benefit fauna. The most common examples are silvopasture where cattle, goats, or sheep browse on grasses grown under trees.^[53] In hot climates, the animals are less stressed and put on weight faster when grazing in a cooler, shaded environment. The leaves of trees or shrubs can also serve as fodder.

Similar systems support other fauna. Deer and pigs gain when living and feeding in a forest ecosystem, especially when the tree forage nourishes them. In aquaforestry, trees shade fish ponds. In many cases, the fish eat the leaves or fruit from the trees.

The dehesa or montado system of silviculture are an example of pigs and bulls being held extensively in Spain and Portugal.^[54]

Boundary systems

 

A riparian buffer bordering a river in Iowa

• A living fence can be a thick hedge or fence wire strung on living trees. In addition to restricting the movement of people and animals, living fences offer habitat to insect-eating birds and, in the case of a boundary hedge, slow soil erosion.
• Riparian buffers are strips of permanent vegetation located along or near active watercourses or in ditches where water runoff concentrates. The purpose is to keep nutrients and soil from contaminating the water.
• Windbreaks reduce wind velocity over and around crops. This increases yields through reduced drying of the crop and/or by preventing the crop from toppling in strong wind gusts.

Agroforestry in Switzerland

Since the 1950s, four-fifths of Swiss Hochstammobstgärten (traditional orchards with tall trees) have disappeared. An agroforestry scheme was tested here with hochstamm trees together with annual crops. Trees tested were walnut (Juglans regia) and cherry (Prunus avium). Forty to seventy trees per hectare were recommended, yields were somewhat decreasing with increasing tree height and foliage.^[55] However, the total yield per area is shown to be up to 30 percent higher than for monocultural systems.^[56]

Another set of tests involve growing Populus tremula for biofuel at 52 trees a hectare and with grazing pasture alternated every two to three years with maize or sorghum, wheat, strawberries and fallowing between rows of modern short-pruned & grafted apple cultivars ('Boskoop' & 'Spartan') and growing modern sour cherry cultivars ('Morina', 'Coraline' and 'Achat') and apples, with bushes in the rows with tree (dogrose, Cornus mas, Hippophae rhamnoides) intercropped with various vegetables.^[57]

Historical use

Though the formal scientific study of agroforestry is relatively new, beginning in the 20th century with ethnobotanical studies carried out by anthropologists, agroforestry has existed for centuries, practiced by local and/or indigenous communities that lived in close relationship with forest ecosystems.^[18][15] Native American forestry practices are an example of this. Indigenous peoples of California periodically burned oak and other habitats to maintain a 'pyrodiversity collecting model'. This method allowed for greater tree health and improved habitat in general.^[58]

Challenges

Although agroforestry systems can be advantageous,^[19][59] they are not widespread in the US as of 2013.^[59][60]

As suggested by a survey of extension programs in the United States, obstacles (ordered most critical to least critical) to agroforestry adoption include:^[60]

• Lack of developed markets
• Unfamiliarity with technologies
• Lack of awareness
• Competition between trees, crops and animals
• Lack of financial assistance
• Lack of apparent profit potential
• Lack of demonstration sites
• Expense of additional management
• Lack of training or expertise
• Lack of knowledge about where to market products
• Lack of technical assistance
• Adoption/start up costs, including costs of time
• Unfamiliarity with alternative marketing approaches (e.g. web)
• Unavailability of information about agroforestry
• Apparent inconvenience
• Lack of infrastructure (e.g. buildings, equipment)
• Lack of equipment
• Insufficient land
• Lack of seed/seedling sources
• Lack of scientific research

Some solutions to these obstacles have been suggested.^[60]

See also

• Afforestation
• Carbon farming
• Deforestation
• Deforestation and climate change
• Farmer-managed natural regeneration
• Fertilizer tree
• Forest farming
• Forest gardening
• LULUCF
• Mycoforestry
• Pastoral farming
• Permaculture
• Streuobstwiese
• Sustainable agriculture
• Sustainable forest management
• Silviculture
• Silvopasture

Sources

  This article incorporates text from a free content work. Licensed under CC BY-SA 3.0 IGO (license statement/permission). Text taken from The State of the World’s Forests 2020. Forests, biodiversity and people – In brief​, FAO & UNEP, FAO & UNEP.

References

1. "Agroforestry". www.fao.org. Retrieved 26 February 2022.
2. "What is agroforestry?". www.aftaweb.org. Retrieved 29 April 2018.
3. "Agroforestry- A Sustainable Solution to Address Climate Change Challenges". ResearchGate. Retrieved 23 July 2021.
4. "National Agroforestry Center". USDA National Agroforestry Center (NAC).
5. Beets, Willem C. (6 March 2019). Multiple Cropping and Tropical Farming Systems. doi:10.1201/9780429036491. ISBN 9780429036491. S2CID 179131607.
6. Francis, Charles A. (1 January 1989), Brady, N. C. (ed.), "Biological Efficiencies in Multiple-Cropping Systems11This article is a contribution from the Department of Agronomy at the University of Nebraska, Lincoln, Nebraska 68583.", Advances in Agronomy, Academic Press, vol. 42, pp. 1–42, doi:10.1016/s0065-2113(08)60522-2, retrieved 23 February 2023
7. Ghosh-Jerath, Suparna; Kapoor, Ridhima; Ghosh, Upasona; Singh, Archna; Downs, Shauna; Fanzo, Jessica (2021). "Pathways of Climate Change Impact on Agroforestry, Food Consumption Pattern, and Dietary Diversity Among Indigenous Subsistence Farmers of Sauria Paharia Tribal Community of India: A Mixed Methods Study". Frontiers in Sustainable Food Systems. 5: 667297. doi:10.3389/fsufs.2021.667297. ISSN 2571-581X. PMC 7613000. PMID 35811836.
8. Kuyah, Öborn, Jonsson, Dahlin, Barrios, Muthuri, Malmer, Nyaga, Magaju, Namirembe (2016). "Trees in agricultural landscapes enhance provision of ecosystem services in Sub-Saharan Africa". International Journal of Biodiversity Science, Ecosystem Services & Management. 12: 255–273. doi:10.1080/21513732.2016.1214178. S2CID 88708132.{{cite journal}}: CS1 maint: multiple names: authors list (link)
9. Iqbal, Nausheen. "A Food Forest Grows in Atlanta". USDA.gov blog. Retrieved 17 June 2018.
10. Coble, Adam P.; Contosta, Alexandra R.; Smith, Richard G.; Siegert, Nathan W.; Vadeboncoeur, Matthew; Jennings, Katie A.; Stewart, Anthony J.; Asbjornsen, Heidi (15 June 2020). "Influence of forest-to-silvopasture conversion and drought on components of evapotranspiration". Agriculture, Ecosystems & Environment. 295: 106916. doi:10.1016/j.agee.2020.106916. ISSN 0167-8809. S2CID 216426779.
11. Schoeneberger, Michele M. (2017). Patel-Weynand, Toral; Bentrup, Gary; Schoeneberger, Michele M (eds.). "Agroforestry: Enhancing resiliency in U.S. agricultural landscapes under changing conditions". Gen. Tech. Report WO-96. doi:10.2737/WO-GTR-96. Retrieved 17 June 2018.
12. Wojtkowski, Paul A. (1 December 1998). The theory and practice of agroforestry design: a comprehensive study of the theories, concepts and conventions that underlie the successful use of agroforestry. Science Publishers. ISBN 978-1-57808-034-2.
13. Wojtkowski, P. (2019) Agroecology: Simplified and Explained, Springer, 420p.
14. Wojtkowski, Paul Anthony (2002). Agroecological Perspectives in Agronomy, Forestry, and Agroforestry. Science Publishers. ISBN 978-1-57808-217-9.
15. Olofson, Harold (1983). "INDIGENOUS AGROFORESTRY SYSTEMS". Philippine Quarterly of Culture and Society.
16. Castle, Sarah E.; Miller, Daniel C; Merten, Nikolas; Ordonez, Pablo J.; Baylis, Kathy (2022). "Evidence for the impacts of agroforestry on ecosystem services and human well-being in high-income countries: a systematic map". Environmental Evidence. 11. doi:10.1186/s13750-022-00260-4. S2CID 247501751.
17. Wilson, Sarah Jane; Schelhas, John; Grau, Ricardo; Nanni, A Sofia; Sloan, Sean (2017). "Forest ecosystem-service transitions: the ecological dimensions of the forest transition". Ecology and Society. 22 (4). doi:10.5751/ES-09615-220438. hdl:11336/67453.
18. Vira, Bhasakar; Wildburger, Christoph; Mansourian, Stephanie (2015). Forests and Food: Addressing Hunger and Nutrition Across Sustainable Landscapes. Open Book Publishers. pp. 73–136.
19. . Agroforestry Research Trust [in England]. Archived from the original on 20 April 2015.
20. Harvey, Celia A.; Villalobos, Jorge A. González (1 July 2007). "Agroforestry systems conserve species-rich but modified assemblages of tropical birds and bats". Biodiversity and Conservation. 16 (8): 2257–2292. doi:10.1007/s10531-007-9194-2. hdl:11056/22760. ISSN 0960-3115. S2CID 8412676.
21. Jose, S. (2009). Agroforestry for ecosystem services and environmental benefits: an overview. Agroforestry Systems, 76(1), 1–10. doi:10.1007/s10457-009-9229-7
22. Nair, P. K. Ramachandran; Kumar, B. Mohan; Nair, Vimala D. (2021), "Soils and Agroforestry: General Principles", An Introduction to Agroforestry, Cham: Springer International Publishing, pp. 367–382, doi:10.1007/978-3-030-75358-0_15, ISBN 978-3-030-75357-3, S2CID 245924011, retrieved 13 May 2023
23. Béliveau, Annie; Lucotte, Marc; Davidson, Robert; Paquet, Serge; Mertens, Frédéric; Passos, Carlos J.; Romana, Christine A. (December 2017). "Reduction of soil erosion and mercury losses in agroforestry systems compared to forests and cultivated fields in the Brazilian Amazon". Journal of Environmental Management. 203 (Pt 1): 522–532. doi:10.1016/j.jenvman.2017.07.037. ISSN 0301-4797. PMID 28841519.
24. Brandolini, Filippo; Compostella, Chiara; Pelfini, Manuela; Turner, Sam (May 2023). "The Evolution of Historic Agroforestry Landscape in the Northern Apennines (Italy) and Its Consequences for Slope Geomorphic Processes". Land. 12 (5): 1054. doi:10.3390/land12051054. ISSN 2073-445X.
25. Young, Anthony (1994). Agroforestry for Soil Conservation. CAB International.
26. Agroforestry for landscape restoration. 2017. doi:10.4060/i7374e. ISBN 978-92-5-132949-8.
27. Udawatta, Ranjith P.; Krstansky, J. John; Henderson, Gray S.; Garrett, Harold E. (July 2002). "Agroforestry practices, runoff, and nutrient loss: a paired watershed comparison". Journal of Environmental Quality. 31 (4): 1214–1225. doi:10.2134/jeq2002.1214. ISSN 0047-2425. PMID 12175039.
28. Jose, Shibu (1 May 2009). "Agroforestry for ecosystem services and environmental benefits: an overview". Agroforestry Systems. 76 (1): 1–10. doi:10.1007/s10457-009-9229-7. ISSN 0167-4366. S2CID 8420597.
29. Reij, C. and R. Winterbottom (2015). Scaling up Regreening: Six Steps to Success. World Resources Institute, World Resources Institute: 1-72.
30. Nchanji, Y. K., Nkongho, R. N., Mala, W. A., Levang, P. (2016). "Efficacy of oil palm intercropping by smallholders. Case study in South-West Cameroon." Agroforestry systems 90(3): 509-519.
31. The State of the World's Forests 2020. Forests, biodiversity and people – In brief. Rome: FAO & UNEP. 2020. doi:10.4060/ca8985en. ISBN 978-92-5-132707-4. S2CID 241416114.
32. Kay, Sonja; Rega, Carlo; Moreno, Gerardo; den Herder, Michael; Palma, João H.N.; Borek, Robert; Crous-Duran, Josep; Freese, Dirk; Giannitsopoulos, Michail; Graves, Anil; Jäger, Mareike; Lamersdorf, Norbert; Memedemin, Daniyar; Mosquera-Losada, Rosa; Pantera, Anastasia (April 2019). "Agroforestry creates carbon sinks whilst enhancing the environment in agricultural landscapes in Europe". Land Use Policy. 83: 581–593. doi:10.1016/j.landusepol.2019.02.025. ISSN 0264-8377. S2CID 159179077.
33. "Multistrata Agroforestry". Project Drawdown. 7 February 2020. Retrieved 4 December 2020.
34. Read "Negative Emissions Technologies and Reliable Sequestration: A Research Agenda" at NAP.edu. 2019. doi:10.17226/25259. ISBN 978-0-309-48452-7. PMID 31120708. S2CID 134196575.
35. Montagnini, F.; Nair, P. K. R. (1 July 2004). "Carbon sequestration: An underexploited environmental benefit of agroforestry systems". Agroforestry Systems. 61–62 (1–3): 281. doi:10.1023/B:AGFO.0000029005.92691.79. ISSN 0167-4366. S2CID 33847583.
36. Zomer, Robert J.; Neufeldt, Henry; Xu, Jianchu; Ahrends, Antje; Bossio, Deborah; Trabucco, Antonio; van Noordwijk, Meine; Wang, Mingcheng (20 July 2016). "Global Tree Cover and Biomass Carbon on Agricultural Land: The contribution of agroforestry to global and national carbon budgets". Scientific Reports. 6 (1): 29987. Bibcode:2016NatSR...629987Z. doi:10.1038/srep29987. ISSN 2045-2322. PMC 4951720. PMID 27435095.
37. Reppin, Saskia; Kuyah, Shem; de Neergaard, Andreas; Oelofse, Myles; Rosenstock, Todd S. (16 March 2019). "Contribution of agroforestry to climate change mitigation and livelihoods in Western Kenya". Agroforestry Systems. 94: 203–220. doi:10.1007/s10457-019-00383-7. ISSN 1572-9680.
38. Kristjanson, P; Neufeldt H; Gassner A; Mango J; Kyazze FB; Desta S; Sayula G; Thiede B; Forch W; Thornton PK; Coe R (2012). "Are food insecure smallholder households making changes in their farming practices? Evidence form East Africa". Food Security. 4 (3): 381–397. doi:10.1007/s12571-012-0194-z.
39. Langford, Kate (8 July 2009). . World Agroforestry Centre. Archived from the original on 20 June 2010. Retrieved 2 April 2014.
40. Bayala, Jules; Larwanou, Mahamane; Kalinganire, Antoine; Mowo, Jeremias G.; Weldesemayat, Sileshi G.; Ajayi, Oluyede C.; Akinnifesi, Festus K.; Garrity, Dennis Philip (1 September 2010). "Evergreen Agriculture: a robust approach to sustainable food security in Africa" (PDF). Food Security. 2 (3): 197–214. doi:10.1007/s12571-010-0070-7. ISSN 1876-4525. S2CID 12815631.
41. Ayarza, M. A.; Welchez, L. A. (2004). "Drivers effecting the development and sustainability of the Quesungual Slash and Mulch Agroforestry System (QSMAS) on hillsides of Honduras" (PDF). In Noble, A. (ed.). fComprehensive Assessment Bright Spots Project Final Report. Retrieved 14 January 2018.
42. Conservation Agriculture: Case Studies in Latin America and Africa. FAO. 2001.
43. Pauli, N.; Barrios, E.; Conacher, A. J.; Oberthür, T. (2011). (PDF). Applied Soil Ecology. 47 (2): 119–132. doi:10.1016/j.apsoil.2010.11.005. Archived from the original (PDF) on 24 March 2016. Retrieved 6 December 2017 – via Elsevier.
44. . www.catie.ac.cr. Archived from the original on 24 April 2018. Retrieved 23 April 2018.
45. Muschler, R. G. (1 August 2001). "Shade improves coffee quality in a sub-optimal coffee-zone of Costa Rica". Agroforestry Systems. 52 (3): 253. doi:10.1023/A:1011863426305. ISSN 0167-4366.
46. Tripathi, Bansh R.; Psychas, Paul J. (1992). The AFNETA Alley Farming Training Manual. Vol. 1 - Core course in alley farming. Ibadan: Alley Farming Network for Tropical Africa (AFNETA). pp. xi+180. hdl:10568/49807. ISBN 978-131-074-X. OCLC 29771935. S2CID 130266228. AGRIS id XF2016015795. hdl:20.500.12478/5101.
47. Elkan, Daniel (20 February 2005). "The Rainforest Saver". The Ecologist.
48. Akinnifesi, F. K.; Makumba, W.; Kwesiga, F. R. (2006). (PDF). Experimental Agriculture. 42 (4): 10 (1–17). doi:10.1017/S0014479706003814. S2CID 29015406. Archived from the original (PDF) on 14 July 2014.
49. Abugre, S.; Asare, A.I.; Anaba, J.A. (2010). (PDF). International Journal of Social Forestry. 3 (2): 134–150 (137). Archived from the original (PDF) on 19 August 2015.
50. Van, Sangyan (February 2019). "Itteri Biofence- Solution for Peafowl nusiance" (PDF). Vansangyan. 6: 33–34.
51. "Could bamboo-based agroforestry systems be the latest kind of climate-smart agriculture?". World Agroforestry. 18 May 2020. from the original on 11 June 2020. Retrieved 25 November 2021.
52. Hoffner, Erik (25 October 2019). "Grand African Savannah Green Up: Major $85 Million Project Announced to Scale up Agroforestry in Africa". Ecowatch. Retrieved 27 October 2019.
53. . Agroforestry Research Trust [in England]. Archived from the original on 20 April 2015. Retrieved 19 August 2015.
54. Fra. Paleo, Urbano. (2010). "The dehesa/montado landscape". pp. 149–151 in Sustainable Use of Biological Diversity in Socio-ecological Production Landscapes, eds. Bélair, C., Ichikawa, K., Wong, B.Y.L. and Mulongoy, K.J. Montreal: Secretariat of the Convention on Biological Diversity. Technical Series no. 52.
55. "Agroforst > Publikationen > Publikationen und Dokumente Schweiz" (PDF). agroforst.ch (in German). Retrieved 23 April 2018.
56. "Agroforstwirtschaft in der Schweiz" (PDF). agrarforschungschweiz.ch (in German). Retrieved 22 August 2020.
57. "Agroforst > Publikationen > Publikationen und Dokumente Schweiz" (PDF). agroforst.ch (in German). Retrieved 23 April 2018.
58. Lightfoot, Kent (2009). California Indians and Their Environment: An Introduction. Berkeley: University of California Press.
59. . United States Department of Agriculture. 28 October 2013. Archived from the original on 1 March 2014. Retrieved 19 February 2014.
60. Jacobson, Michael; Shiba Kar (August 2013). . Journal of Extension. 51 (4). Archived from the original on 8 September 2013. Retrieved 19 February 2014.

External links

 

Wikimedia Commons has media related to Agroforestry.

• National Agroforesty Center (USDA)
• World Agroforestry Centre
• The CGIAR Research Program on Forests, Trees and Agroforestry (FTA)
• The Center for Agroforestry at the University of Missouri
• Australian Agroforestry Foundation
• Australian agroforestry
• The Green Belt Movement
• Plants For A Future

• Agroforestry in France and Europe

Media

• The short film Agroforestry Practices – Alley Cropping (2004) is available for free viewing and download at the Internet Archive..
• The short film Agroforestry Practices – Forest Farming (2004) is available for free viewing and download at the Internet Archive..
• The short film Agroforestry Practices – Riparian Forest Buffers (2004) is available for free viewing and download at the Internet Archive..
• The short film Agroforestry Practices – Silvopasture (2004) is available for free viewing and download at the Internet Archive..
• The short film Agroforestry Practices – Windbreaks (2004) is available for free viewing and download at the Internet Archive..
• Agroforestry, stakes and perspectives. Agroof Production, Liagre F. and Girardin N.