. 2020 Oct 13;56(3):1093–1114. doi: 10.1111/ijfs.14778

Table 4.

Production and area harvested of RTBs and annual average value of production in developing countries, 2016–18

n*	Crop	Production			Area
		(000 000 t)			(000 000 ha)			Price US t^‐1 ^a	Value US$ billions	% of total
		1961–63	1988–90	2016–18	1961–63	1988–90	2016–18	Price US t^‐1 ^a	Value US$ billions	% of total
86	Cassava	74.6	150	281.8	9.9	15.1	24.7	128	36	10.7
90	Potato	28.8	79.1	225.7	3.6	6.3	12.1	318	72	21.2
96	Sweet potato	93.1	121	88.5	12.6	9.1	7.9	741	66	19.4
101	Banana	21.1	54.4	112.9	2	4.1	5.5	621	70	20.7
63	Yam	5.9	18.7	72.9	1.2	2	8.5	743	54	16.0
46	Plantain	13.4	24.5	38.7	2.5	4.2	5.5	597	23	6.8
88	Other RTBs ^b	6.8	9.5	21	1.3	1.7	3.1	920	18	5.3
	Total	243.6	457.4	841.0	33.1	41.8	67.3		339	100

n* denotes number of developing countries that produce that RTB (FAOSTAT, 2020).

^{^a}

IFPRI’s IMPACT model for commodity projections utilizes average prices (US$ t^‐1) in 2005 of 515.99 for banana and plantain, 673.1 for Sweetpotato and yam, taro and yautia and 116.89 and 257.85 for cassava and potato, respectively. Estimated prices for 2030 are 735.61 for banana, 684.82 for plantain, 819.28 for yam, taro and yautia, 815.26 for sweetpotato, 384.17 for potato and 140.25 for cassava. Prices listed above are estimates for 2017 based on a linear interpolation of prices for 2005 and 2030, then rounded to the nearest dollar. The prices for 2005 and 2030 are based on IFPRI researchers’ determinations of past and future market tendencies as well as consultations with specialized scientists in international agricultural research centers around the world.

^{^b}

Other RTBs includes the production (in million t) of taro (10.2), yautia (0.5) and R&T, nes (10.3) for 2016–2018 and with a production value (US$ billions) of 7.6 for taro, 0.3 for yautia and 9.9 for R&T, nes in 2016–2018. Totals may not sum due to rounding. Source: Production and area (FAOSTAT, 2020); prices (IFPRI, 2019).