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Agricultural productivity

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Food production per capita since 1961
Grain silos
Rice plantation in Thailand
Cambodians planting rice, 2004

Agricultural productivity is measured as the ratio of agricultural outputs to inputs.[1] While individual products are usually measured by weight, which is known as crop yield, varying products make measuring overall agricultural output difficult. Therefore, agricultural productivity is usually measured as the market value of the final output. This productivity can be compared to many different types of inputs such as labour or land. Such comparisons are called partial measures of productivity.[2]

Agricultural productivity may also be measured by what is termed total factor productivity (TFP). This method of calculating agricultural productivity compares an index of agricultural inputs to an index of outputs. This measure of agricultural productivity was established to remedy the shortcomings of the partial measures of productivity; notably that it is often hard to identify the factors cause them to change. Changes in TFP are usually attributed to technological improvements.[3]

Agricultural productivity is an important component of food security.[4] Increasing agricultural productivity through sustainable practices can be an important way to decrease the amount of land needed for farming and slow environmental degradation and climate change through processes like deforestation.[5]

Sources of agricultural productivity

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Wheat yields in least developed countries since 1961. The steep rise in crop yields in the U.S. began in the 1940s. The percentage of growth was fastest in the early rapid growth stage. In developing countries maize yields are still rapidly rising.[6]

Productivity is driven by changes in either agricultural technique or improvements in technology. Some sources of changes in agricultural productivity have included:[7]

See: Productivity improving technologies (historical) Section: 2.4.1: Mechanization: Agriculture, Section 2.6: Scientific agriculture.

Impact

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The productivity of a region's farms is important for many reasons. Aside from providing more food, increasing the productivity of farms affects the region's prospects for growth and competitiveness on the agricultural market, income distribution and savings, and labour migration. An increase in a region's agricultural productivity implies a more efficient distribution of scarce resources. As farmers adopt new techniques and differences, the more productive farmers benefit from an increase in their welfare while farmers who are not productive enough will exit the market to seek success elsewhere.[10]

A cooperative dairy factory in Victoria.

As a region's farms become more productive, its comparative advantage in agricultural products increases, which means that it can produce these products at a lower opportunity cost than can other regions.[11] Therefore, the region becomes more competitive on the world market, which means that it can attract more consumers since they are able to buy more of the products offered for the same amount of money. As productivity improvement leads to falling food prices, this automatically leads to increases in real income elsewhere.[12]

Increases in agricultural productivity lead also to agricultural growth and can help to alleviate poverty in poor and developing countries, where agriculture often employs the greatest portion of the population. As farms become more productive, the wages earned by those who work in agriculture increase. At the same time, food prices decrease and food supplies become more stable. Labourers therefore have more money to spend on food as well as other products. This also leads to agricultural growth. People see that there is a greater opportunity to earn their living by farming and are attracted to agriculture either as owners of farms themselves or as labourers.[13]

A liquid manure spreader.

It is not only the people employed in agriculture who benefit from increases in agricultural productivity. Those employed in other sectors also enjoy lower food prices and a more stable food supply. Their wages may also increase.[13]

Food security

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Further information: Food security

Agricultural productivity is becoming increasingly important as the world population continues to grow.[14] As agricultural productivity grows, food prices decrease, allowing people to spend less on food, and combatting hunger.[15] India, one of the world's most populous countries, has taken steps in the past decades to increase its land productivity. In the 1960s North India produced only wheat, but with the advent of the earlier maturing high-yielding wheats and rices, the wheat could be harvested in time to plant rice. This wheat/rice combination is now widely used throughout the Punjab, Haryana, and parts of Uttar Pradesh. The wheat yield of three tons and rice yield of two tons combine for five tons of grain per hectare, helping to feed India's 1.1 billion people.[14]

Higher global food prices between 2006 and 2008, primarily caused by an increasing amount arable land used for growing biofuels and the growing economies in China and elsewhere causing an increase in demand for meat products (which are less efficient than plants in terms of land use), caused the percentage of incomes used for food to increase throughout the world, forcing families to cut back on various other expenditures such as schooling for girls. In areas of sub-Saharan Africa, a decreased agricultural productivity due to crop failures has caused starvation.[15] On the other hand, higher global prices actually mean farmers with successful yields earn more, and this thus increases their productivity.[16]

Investing in the agricultural productivity of women in farming communities is of particular importance in boosting economic development and food security in parts of the developing world. Women in some areas of the world, for example in Africa, traditionally have less agency than men, but are often also more invested in farming in terms of time spent. They are furthermore generally more responsible for childcare, thus their productivity is more likely to translate in gains for the family as a whole.[15]

Relation to population growth

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Further information: Population growth

Some critics claim that increasing agricultural productivity results in human overpopulation. They are argue that, like other species, human populations grow up to their carrying capacity. When a species reaches its carrying capacity, the number of poor and weak individuals who die from disease or starvation is equal to the number of individuals being added to the population via birth. Because innovation continues to improve agricultural productivity (specifically yields), however, the theoretical carrying capacity continues to increase, allowing the human population to continue to grow. These writers claim that there are too many people on Earth and that therefore growth in agricultural productivity is detrimental to the environment — if the carrying capacity was lower, the human population would reach an equilibrium at a lower number.[17][18]

However, unlike other animals, in humans greater development and prosperity has led to lower fecundity. Thus as productivity has increased and poverty has been reduced worldwide, population growth is declining. Research suggests we may actually face a declining world population in the future.[19][20]

Inverse relationship theory

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Dairy cattle in Maryland
Some essential food products including bread, rice and pasta

Deolalikar in 1981 investigated the theory first proposed by Sen in 1975 that in traditional, pre-modern farming in India, there is an inverse relationship to size of the farm and productivity, contrary to the economy of scale found in all other types of economic activity. It is debated whether the inverse relationship actually exists. Numerous studies falsify this theory.[21] In Zimbabwe, policies on agrarian land reform under president Robert Mugabe, especially in and following 2000, split large farms into many smaller farms, and this decreased productivity. Marxist agrarian land reform in the Soviet Union, China and Vietnam combined small farms into larger units, this usually failed to increase productivity.[22]

Nonetheless, increasing agricultural productivity amongst smallholder farms is an important way to improve farmer livelihoods in the developing world.[5]

Sustainable increases in productivity

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Because agriculture has such significant impacts on climate change and other environmental issues, intensification of agriculture, which would increase productivity per amount of land being farmed, is seen by some as an essential method for climate change mitigation, because farmers will not require more land, and are thus incentivized not to participate in further land degradation or deforestation.[5] Implementing intensification through sustainable agriculture practices makes farming more sustainable in the long term, maintaining the ability of future generations to meet their own needs while conserving the environment. International policy, embodied in Sustainable Development Goal 2, focuses on improving these practices at a global level.[23]

Not all effects of climate change will negatively affect agricultural productivity. The IPCC Special Report on Climate Change and Land and the Special Report on Global Warming of 1.5 °C both project mixed changes in the yields of crops as global warming happens with some breadbasket regions becoming less productive, while other crops increase ranges and productivity.[24]

See also

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References

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Citations

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  1. ^ Measuring Agricultural Productivity Using the Average Productivity Index (API) by Lal Mervin Dharmasiri [1] Archived 2013-10-20 at the Wayback Machine
  2. ^ Preckel, Paul V.; Hertel, Thomas W.; Arndt, Channing; Nin, Alejandro (2003-11-01). "Bridging the Gap between Partial and Total Factor Productivity Measures Using Directional Distance Functions". American Journal of Agricultural Economics. 85 (4): 928–942. doi:10.1111/1467-8276.00498. ISSN 0002-9092. S2CID 154456202.
  3. ^ Agricultural Investment and Productivity in Developing Countries, FAO Economic And Social Development Paper No. 148, ed. Lydia Zepeda, 2001, FAO Corporate Document Repository, 12 July 2007, http://www.fao.org/docrep/003/X9447E/x9447e00.HTM.[2]
  4. ^ Mbow et al. 2019, p. 454.
  5. ^ a b c "Sustainable Intensification for Smallholders". Project Drawdown. 2020-02-06. Retrieved 2020-10-16.
  6. ^ Fischer, R. A.; Byerlee, Eric; Edmeades, E. O. "Can Technology Deliver on the Yield Challenge to 2050" (PDF). Expert Meeting on How to Feed the World. Food and Agriculture Organization of the United Nations. Archived from the original (PDF) on 2017-08-09.
  7. ^ Egli, D.B. (2008). "Comparison of Corn and Soybean Yields in the United States: Historical Trends and Future Prospects". Agronomy Journal. 100: S79–88. doi:10.2134/agronj2006.0286c. S2CID 84059626.
  8. ^ About IPNI, the International Plant Nutrition Institute
  9. ^ The Fertilizer Institute
  10. ^ Mundlak, Yair, "Agricultural Productivity and Economic Policies: Concepts and Measurements," OECD Working Paper No. 75, OECD Development Center, August 1992, SourceOECD.org, 13 July 2007 http://miranda.sourceoecd.org/vl=4172647/cl=20/nw=1/rpsv/cgi-bin/wppdf?file=5lgsjhvj7g21.pdf[permanent dead link] (13–16).
  11. ^ Beierlein, James G.; Schneeberger, Kenneth C.; Osburn, Donald D. (2003). Principles of Agribusiness Management (3 ed.). Prospect Heights, Illinois: Waveland Press. p. 154. ISBN 1-57766-267-9.
  12. ^ Field, Alexander J. (2008). "Productivity". In David R. Henderson (ed.). Concise Encyclopedia of Economics (2nd ed.). Indianapolis: Library of Economics and Liberty. ISBN 978-0865976658. OCLC 237794267.
  13. ^ a b Promoting Pro-Poor Growth: Agriculture, DAC Guidelines and Reference Series, Paris: OECD, 2006, OECD.org, 13 July 2007 "37922155.pdf" (PDF). Archived from the original (PDF) on 2007-08-17. Retrieved 2007-07-13. (10).
  14. ^ a b Brown, Lester R. Plan B 2.0: Rescuing a Planet Under Stress and a Civilization in Trouble. New York City: Earth Policy Institute, 2006.
  15. ^ a b c Kumar, Alok; Al Mahmood Mosfeq, Abdullah, eds. (2012). Hunger, Agricultural Production, and Government Policies (PDF). Department of Economics, University of Victoria. pp. 1–31.
  16. ^ "The perfect storm: Global food prices hit six-year high". Al Jazeera English. 13 March 2021. Retrieved 14 March 2021.
  17. ^ Russell Hopfenberg; David Pimentel. "Human population numbers as a function of food supply" (PDF).
  18. ^ Hopfenberg, Russell (2014). "An expansion of the demographic transition model: the dynamic link between agricultural productivity and population" (PDF). Biodiversity. 15 (4). Taylor & Francis: 246–254. Bibcode:2014Biodi..15..246H. doi:10.1080/14888386.2014.973904. S2CID 54798262.
  19. ^ Wise, Jeff (9 January 2013). "About That Overpopulation Problem". Slate. The Slate Group. Retrieved 11 March 2021.
  20. ^ Tupy, Marian L. (10 January 2013). "Prosperity and World Population Growth". Cato Institute. Retrieved 11 March 2021.
  21. ^ Deolalikar, Anil B. (1981). "The Inverse Relationship between Productivity and Farm Size: A Test Using Regional Data from India". American Journal of Agricultural Economics. 63 (2): 275–279. doi:10.2307/1239565. ISSN 0002-9092. JSTOR 1239565.
  22. ^ Jacobs, Susie (2010). "Agrarian reform" (PDF). Sociopedia. International Sociological Association. p. 8. doi:10.1177/205684601072 (inactive 2024-09-12).{{cite encyclopedia}}: CS1 maint: DOI inactive as of September 2024 (link)
  23. ^ Goals, sustainable development. "Sustainable agriculture".
  24. ^ Mbow et al. 2019, pp. 439–442.

Cited sources

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  • Mbow, C.; Rosenzweig, C.; Barioni, L. G.; Benton, T.; et al. (2019). "Chapter 5: Food Security" (PDF). Climate Change and Land: an IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems. p. 454.


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