TRADE AND MARKET I NG New ‘sustainable’ diet underestimates value of potatoes Tonnes Hectares t/ha Maize/corn Wheat Rice (paddy) Potatoes Cassava Soybeans Sugar cane* Barley Sweet pots. Cabbages Sorghum Rape oil Yams Sugar beet* Palm Oil Groundnuts Millet Sunflower Plantains Oats Pumpkins, squash etc Beans, dry Broccoli (cauliflower) Rye Triticale Tree Nuts Taro (cocoyam) Peas, dry Chick peas Peas, green Beans, snap millions 822.7 689.9 685.0 314.1 233.0 231.0 174.3 157.6 110.1 69.7 65.5 57.9 51.7 41.0 38.9 38.2 35.7 35.6 34.3 25.8 20.9 20.4 18.0 17.8 14.0 12.2 11.8 9.8 8.8 8.3 6.8 millions 161.0 223.6 159.0 18.2 18.7 96.9 24.4 56.8 8.2 3.1 44.9 30.3 4.9 4.4 9.7 24.6 37.4 25.0 5.4 11.3 1.5 28.0 1.1 6.8 3.9 8.7 1.6 5.9 11.6 1.1 1.0 5.1 65.8 2974 3.1 94.5 2421 4.3 48.8 17.3 12.5 7.2 2356 2.4 84.3 997 2438 0.0 13.5 22.4 1.5 1.9 2.8 19.7 558 1.7 0.9 93 20 224 10.5 9.3 4.0 1.6 1.0 1.4 6.4 2.3 13.7 0.7 17.0 2.6 3.6 1.4 7.2 1.7 0.8 7.4 6.9 Protein Calories Prot/ha tonnes trillions 0.409 0.423 0.307 0.870 0.000 0.347 0.211 0.287 0.000 Cal/ha millions 18.5 10.8 14.8 6.3 240 0.345 13.2 3.2 363 0.169 19.4 10.3 100.0 9.8 7.4 238 0.165 0.0 0.0 0.0 9.9 439 344 23 0.000 0.000 0.401 7.4 0.3 4.5 0.5 0.296 11.4 6.4 5.3 7.4 0.8 60 0.161 12.1 100.0 35.4 0.9 3.4 8.7 3.9 129 0.105 217 0.4 45 0.083 8.4 4.4 99 0.384 8.7 19 64 7 0.180 0.160 0.478 0 0 0 0 0 0 0.243 0.109 0.289 0.147 0.400 0.127 12.7 2.3 6.7 1.8 62 0.271 9.1 1.8 49 0.470 12.6 2.1 0.2 1.7 1.7 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 Nutritional value per hectare key calcula tion Analysis of other data, not published by EAT Forum, would also suggest that the protein and calorie value of potatoes have been underestimated in the research. The USDA says potatoes have 2.05g of protein per 100g. Using EAT Forum’s average global yield of 17.3t/ ha, the volume of protein produced per hectare of potatoes would be 354kg/ hectare. The latest UN FAOSTAT average global potato yield for 2017 is 20.33 tonnes/hectare, which deliver 417kg/ hectare of protein. The USDA calculates that the protein content of long-grain white rice is 2.69g/100g. That would deliver 115.9Kg of protein per hectare, according to EAT Forum’s average yield of 4.3t/ha. The latest average global rice yield is 4.5t/ha, according to the UN FAOSTAT, which would deliver 124kg of protein. The USDA also states that 100g of potatoes delivers 77 calories/100g, while rice delivers 130 calories/100g. On an area basis that equals 15.6 million calories per hectare for potatoes and 5.98 million calories per hectare for rice. Comparing potatoes with a selection of grains and a pulse it scores well across the board, with only sweet potatoes and corn scoring higher. Corn and sweet potatoes also score higher on a calories/hectare basis. However, potatoes have a significantly higher potassium content than any of the other foods and a much higher Vitamin C content. The calcium content of sweet potatoes are a little higher than potatoes. EAT Forum urges people to eat a lot more pulses. It is true that on a kilogram basis a pulse such as lentil delivers a lot more protein and is high in calories, potassium and calcium compared to 40 Potato World 2019 • number 1 Pagina 39
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