This paper reviews recent developments in crop science that can be the basis of a revolution in the global food system but it is also emphasized that such a revolution requires more than changes in food production and supply. We must more effectively feed a growing global population with a healthy diet while also defining and delivering the kinds of sustainable food systems that will minimise damage to our planet. There are exciting new developments in crop production biology but much existing crop science can be exploited to increase yields with the aid of a knowledge exchange (KE) framework requiring the use of new technology now available to most people across the globe. We discuss novel approaches at both the plant and the crop level that will enhance nutrient and water productivity and we also outline ways in which energy use and greenhouse gas (GHG) emissions can be reduced and labor shortages combatted. Exploitation of new biology and new engineering opportunities will require development of public-private partnerships and collaborations across the disciplines to allow us to move effectively from discovery science to practical application. It is also important that consumers contribute to the debate over proposed changes to food and farming and so effective KE mechanisms are required between all relevant communities.
. [J]. Frontiers of Agricultural Science and Engineering, 2020, 7(1): 28-44.
William J. DAVIES, Susan E. WARD, Alan WILSON. Can crop science really help us to produce more better-quality food while reducing the world-wide environmental footprint of agriculture?. Front. Agr. Sci. Eng. , 2020, 7(1): 28-44.
H C J Godfray, J R Beddington, I R Crute, L Haddad, D Lawrence, J F Muir, J Pretty, S Robinson, S M Thomas, C Toulmin. Food security: the challenge of feeding 9 billion people. Science, 2010, 327(5967): 812–818 https://doi.org/10.1126/science.1185383
pmid: 20110467
2
GOV.UK. Foresight. The Future of Food and Farming. Executive Summary. The Government Office for Science, London. Available at UK Government website on November 1, 2019
3
UN Food and Agriculture Organisation (FAO). IFAD, UNICEF, WFP, WHO report on the state of food security and nutrition in the world 2018. Building climate resilience for food security and nutrition. Available at FAO website on November 1, 2019
4
W Willett, J Rockström, B Loken, M Springmann, T Lang, S Vermeulen, T Garnett, D Tilman, F DeClerck, A Wood, M Jonell, M Clark, L J Gordon, J Fanzo, C Hawkes, R Zurayk, J A Rivera, W De Vries, L Majele Sibanda, A Afshin, A Chaudhary, M Herrero, R Agustina, F Branca, A Lartey, S Fan, B Crona, E Fox, V Bignet, M Troell, T Lindahl, S Singh, S E Cornell, K Srinath Reddy, S Narain, S Nishtar, C J L Murray. Food in the Anthropocene: the EAT-Lancet Commission on healthy diets from sustainable food systems. Lancet, 2019, 393(10170): 447–492 https://doi.org/10.1016/S0140-6736(18)31788-4
pmid: 30660336
5
The Paris Agreement of the UN Climate Change Convention (UNCCC). Available at UNCCC website on November 1, 2019
Consultative Group for International Agricultural Research (CGIAR). C4 RICE research project funded by the Gates Foundation and others. Available at CGIAR website on November 1, 2019
8
Intergovernmental Panel on Climate Change (IPCC). Report of The Intergovernmental Panel on Climate Change (IPCC) focussing on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems. Available at IPCC website on November 1, 2019
9
L Haddad, C Hawkes, J Waage, P Webb. Food systems and diets: facing the challenges of the 21st century. London, UK: Global Panel on Agriculture and Food Systems for Nutrition, 2016
10
Organisation for Economic Cooperation and Development (OECD). Key findings of an Organisation for Economic Cooperation and Development (OECD) report on obesity rates in Europe. Data for the United Kingdom. Available at the OECD website on November 1, 2019
11
The World Health Organisation (WHO). Report from the World Health Organisation (WHO) on obesity. Available at WHO website on November 1, 2019
J A Kirkegaard, M K Conyers, J R Hunt, C A Kirkby, M Watt, G J Rebetzke. Sense and nonsense in conservation agriculture: principles, pragmatism and productivity in Australian mixed farming systems. Agriculture, Ecosystems & Environment, 2014, 187: 133–145 https://doi.org/10.1016/j.agee.2013.08.011
15
D Baulcombe, I Crute, W J Davies, J Dunwell, M Gale, J Jones, J Pretty, W Sutherland, C Toulmin. Reaping the benefits: science and the sustainable intensification of global agriculture. London, UK: Royal Society, 2009, 86
16
L Lipper, P Thornton, B M Campbell, T Baedeker, A Braimoh, M Bwalya, P Caron, A Cattaneo, D Garrity, K Henry, R Hottle, L Jackson, A Jarvis, F Kossam, W Mann, N McCarthy, A Meybeck, H Neufeldt, T Remington, P T Sen, R Sessa, R Shula, A Tibu, E F Torquebiau. Climate-smart agriculture for food security. Nature Climate Change, 2014, 4(12): 1068–1072 https://doi.org/10.1038/nclimate2437
17
T Bukovinszky, J Verheijen, S Zwerver, E Klop, J C Biesmeijer, F L Wäckers, H H T Prins, D Kleijn. Exploring the relationships between landscape complexity, wild bee species richness and reproduction, and pollination services along a complexity gradient in the Netherlands. Biological Conservation, 2017, 214: 312–319 https://doi.org/10.1016/j.biocon.2017.08.027
18
E O Wilson. Half Earth: our planet’s fight for life. New York, USA: Liveright Publishing, 2016
Royal Society of Biology (RSB). Growing the Future, a report from the UK Plant Science Federation on the future for British Plant Science. Available at RSB website on November 1, 2019
21
Lancaster Environment Centre. Collaborative training partnership for sustainable food production. Available at Lancaster Environment Centre website on November 1, 2019
22
C J Stevens, R Whittle, W J Davies, J E Taylor. Raising awareness about food security using a massive open online course. Plants, People and Planet, 2019 [Published Online] doi:1002/ppp3.10069
23
Lancaster Environment Centre. Distance learning food security programme for those with interest in or working within the Global Food System. Available at Lancaster Environment Centre website on November 1, 2019
24
W Zhang, G Cao, X Li, H Zhang, C Wang, Q Liu, X Chen, Z Cui, J Shen, R Jiang, G Mi, Y Miao, F Zhang, Z Dou. Closing yield gaps in China by empowering smallholder farmers. Nature, 2016, 537(7622): 671–674 https://doi.org/10.1038/nature19368
pmid: 27602513
25
X Jiao, Y Lyu, X Wu, H Li, L Cheng, C Zhang, L Yuan, R Jiang, B Jiang, Z Rengel, F Zhang, W J Davies, J Shen. Grain production versus resource and environmental costs: towards increasing sustainability of nutrient use in China. Journal of Experimental Botany, 2016, 67(17): 4935–4949 https://doi.org/10.1093/jxb/erw282
pmid: 27489235
26
A Jägerskog, T Jønch Clausen. Feeding a thirsty world: challenges and opportunities for a water and food secure future. Report 31. Stockholm, Sweden: SIWI, 2012
27
S Z Kang, X L Su, L Tong, J H Zhang, L Zhang, W J Davies. A warning from an ancient oasis: intensive human activities are leading to potential ecological and social catastrophe. International Journal of Sustainable Development and World Ecology, 2008, 15(5): 440–447 https://doi.org/10.3843/SusDev.15.5:5
28
S Kang, E A B Eltahir. North China Plain threatened by deadly heatwaves due to climate change and irrigation. Nature Communications, 2018, 9(1): 2894 https://doi.org/10.1038/s41467-018-05252-y
pmid: 30065269
29
Z Cui, H Zhang, X Chen, C Zhang, W Ma, C Huang, W Zhang, G Mi, Y Miao, X Li, Q Gao, J Yang, Z Wang, Y Ye, S Guo, J Lu, J Huang, S Lv, Y Sun, Y Liu, X Peng, J Ren, S Li, X Deng, X Shi, Q Zhang, Z Yang, L Tang, C Wei, L Jia, J Zhang, M He, Y Tong, Q Tang, X Zhong, Z Liu, N Cao, C Kou, H Ying, Y Yin, X Jiao, Q Zhang, M Fan, R Jiang, F Zhang, Z Dou. Pursuing sustainable productivity with millions of smallholder farmers. Nature, 2018, 555(7696): 363–366 https://doi.org/10.1038/nature25785
pmid: 29513654
30
A M Loboguerrero, B Campbell. Effective farmers confronting climate change. CCAFS AgClim Letters, 2019
31
Wefarm. The world’s largest digital farmer to farmer network. Available at Wefarm website on November 1, 2019
32
Global Plant Council (GPC). The Global Plant Council (GPC) seeks to facilitate the development of plant science for global challenges such as world hunger, sustainability, environmental protection, and climate change. Available at GPC website on November 1, 2019
33
The Food and Agriculture Organisation (FAO). How to Feed the World in 2050. Available at FAO website on November 1, 2019
34
University of Illinois. The RIPE Project funded by the Gates Foundation and others addresses the means of increasing food production using bio-engineering Information on the project. Available at University of Illinois wesite on November 1, 2019
35
Engineering Nitrogen Symbiosis for Africa (ENSA). The ENSA Project funded by the Gates Foundation and others focusses on engineering nitrogen symbiosis for Africa. Available at ENSA website on November 1, 2019
36
J Kromdijk, K Głowacka, L Leonelli, S T Gabilly, M Iwai, K K Niyogi, S P Long. Improving photosynthesis and crop productivity by accelerating recovery from photoprotection. Science, 2016, 354(6314): 857–861
pmid: 27856901
37
P F South, A P Cavanagh, H W Liu, D R Ort. Synthetic glycolate metabolism pathways stimulate crop growth and crop productivity in the field. Science, 2019, 363(6422): eaat9077
D B Lobell, M J Roberts, W Schlenker, N Braun, B B Little, R M Rejesus, G L Hammer. Greater sensitivity to drought accompanies maize yield increase in the U.S. Midwest. Science, 2014, 344(6183): 516–519 https://doi.org/10.1126/science.1251423
pmid: 24786079
R A Richards. Defining selection criteria to improve yield under drought. Plant Growth Regulation, 1996, 20(2): 157–166 https://doi.org/10.1007/BF00024012
42
Z Zhao, G J Rebetzke, B Zheng, S C Chapman, E Wang. Modelling impact of early vigour on wheat yield in dryland regions. Journal of Experimental Botany, 2019, 70(9): 2535–2548 https://doi.org/10.1093/jxb/erz069
pmid: 30918963
43
K Glowaka, J Kromdijk, K Kucera, J Xie, A P Cavanagh, L Leonelli, A D B Leakey, D R Ort, K K Niyogi, S P Long. Photosystem II subunit S overexpression increases the efficiency of water use in a field-grown crop. Nature Communications, 2018, 9: 868
44
J R Hunt, J M Lilley, B Trevaskis, B M Flohr, A Peake, A Fletcher, A B Zwart, D Gobbett, J A Kirkegaard. Early sowing systems can boost Australian wheat yields despite recent climate change. Nature Climate Change, 2019, 9(3): 244–247 https://doi.org/10.1038/s41558-019-0417-9
45
B Vanlauwe, J Wendt, K E Giller, M Corbeels, B Gerard, C Nolte. A fourth principle is required to define Conservation Agriculture in sub-Saharan Africa: the appropriate use of fertilizer to enhance crop productivity. Field Crops Research, 2014, 155: 10–13 https://doi.org/10.1016/j.fcr.2013.10.002
46
J A Kirkegaard, R Munns, R A James, P A Gardner, J F Angus. Reduced growth and yield of wheat with conservation cropping. II. Soil biological factors limit growth under direct drilling. Australian Journal of Agricultural Research, 1995, 46(1): 75–88 https://doi.org/10.1071/AR9950075
47
J A Kirkegaard, J R Hunt. Increasing productivity by matching farming system management and genotype in water-limited environments. Journal of Experimental Botany, 2010, 61(15): 4129–4143 https://doi.org/10.1093/jxb/erq245
pmid: 20709725
48
T Du, S Kang, J Zhang, W J Davies. Deficit irrigation and sustainable water-resource strategies in agriculture for China’s food security. Journal of Experimental Botany, 2015, 66(8): 2253–2269 https://doi.org/10.1093/jxb/erv034
pmid: 25873664
E Fereres, F Orgaz, V Gonzalez-Dugo. Reflections on food security under water scarcity. Journal of Experimental Botany, 2011, 62(12): 4079–4086 https://doi.org/10.1093/jxb/err165
pmid: 21624976
51
M M Chaves, T P Santos, C R Souza, M F Ortuno, M L Rodrigues, C M Lopes, J P Maroco, J S Pereira. Deficit irrigation in grapevine improves water-use efficiency while controlling vigour and production quality. Annals of Applied Biology, 2007, 150(2): 237–252 https://doi.org/10.1111/j.1744-7348.2006.00123.x
52
P A A Dodds, J M Taylor, M A Else, C J Atkinson, W J Davies. Partial rootzone drying increases antioxidant activity in strawberries. Acta Horticulturae, 2007, (744): 295–302 https://doi.org/10.17660/ActaHortic.2007.744.30
53
H G Jones, R Serraj, B R Loveys, L Z Xiong, A Wheaton, A H Price. Thermal infrared imaging of crop canopies for the remote diagnosis and quantification of plant responses to water stress in the field. Functional Plant Biology, 2009, 36(11): 978–989 https://doi.org/10.1071/FP09123
54
E Fereres, M A Soriano. Deficit irrigation for reducing agricultural water use. Journal of Experimental Botany, 2007, 58(2): 147–159 https://doi.org/10.1093/jxb/erl165
pmid: 17088360
55
A H Price, G J Norton, D E Salt, O Ebenhoeh, A A Meharg, C Meharg, M R Islam, R N Sarma, T Dasgupta, A M Ismail, K L McNally, H Zhang, I C Dodd, W J Davies. Alternate wetting and drying irrigation for rice in Bangladesh: is it sustainable and has plant breeding something to offer? Food and Energy Security, 2013, 2(2): 120–129 https://doi.org/10.1002/fes3.29
56
A K Thakur, N T Uphoff, W A Stoop. Scientific underpinnings of the System of Rice Intensification (SRI): what is known so far? Advances in Agronomy, 2015, 135: 147–179 https://doi.org/10.1016/bs.agron.2015.09.004
57
W G Spollen, R E Sharp, I N Saab, Y Wu. Regulation of cell expansion in roots and shoots at low water potentials. In: Smith J A C, Griffiths H, eds. Water deficits: responses from cell to community. Bios Oxford, 1993, 37–52
J C Yang, J H Zhang, Z Q Wang, Q S Zhu, W Wang. Remobilization of carbon reserves in response to water-deficit during grain filling of rice. Field Crops Research, 2001, 71(1): 47–55 https://doi.org/10.1016/S0378-4290(01)00147-2
60
J C Yang, J H Zhang, L Liu, Z Q Wang, Q S Zhu. Carbon remobilization and grain filling in japonica/indica hybrid rice subjected to post-anthesis water deficits. Agronomy Journal, 2002, 94(1): 102–109 https://doi.org/10.2134/agronj2002.0102
61
J Yang, J Zhang, Z Wang, Q Zhu, W Wang. Hormonal changes in the grains of rice subjected to water stress during grain filling. Plant Physiology, 2001, 127(1): 315–323 https://doi.org/10.1104/pp.127.1.315
pmid: 11553759
62
J Yang, J Zhang, Z Wang, Q Zhu. Activities of starch hydrolytic enzymes and sucrose-phosphate synthase in the stems of rice subjected to water stress during grain filling. Journal of Experimental Botany, 2001, 52(364): 2169–2179 https://doi.org/10.1093/jexbot/52.364.2169
pmid: 11604456
63
J Yang, J Zhang, Z Wang, G Xu, Q Zhu. Activities of key enzymes in sucrose-to-starch conversion in wheat grains subjected to water deficit during grain filling. Plant Physiology, 2004, 135(3): 1621–1629 https://doi.org/10.1104/pp.104.041038
pmid: 15235118
64
A A Belimov, I C Dodd, N Hontzeas, J C Theobald, V I Safronova, W J Davies. Rhizosphere bacteria containing 1-aminocyclopropane-1-carboxylate deaminase increase yield of plants grown in drying soil via both local and systemic hormone signalling. New Phytologist, 2009, 181(2): 413–423 https://doi.org/10.1111/j.1469-8137.2008.02657.x
pmid: 19121036
WRAP. Reducing the use of plastics in agriculture. The Courtauld Commission for WRAP UK. Available at WRAP website on November 1, 2019
67
J J Schröder, A L Smit, D Cordell, A Rosemarin. Improved phosphorus use efficiency in agriculture: a key requirement for its sustainable use. Chemosphere, 2011, 84(6): 822–831 https://doi.org/10.1016/j.chemosphere.2011.01.065
pmid: 21349568