The price of food crops has risen by 40% since the beginning of 2002, although that increase is dwarfed by huge run-ups in the prices of oil and metals, as the left-hand chart, below, shows.
然而这样的增长仍然无法和极速攀升的油价和金价同日而语。如左下方图表所示。
Benefit cost ratio under balanced fertilization regimes exceeded 2.5 for oil palm in Thailand and 7 for food crops in Indonesia.
通过平衡施肥，泰国油棕榈的产投比超过2.5，而印尼粮食作物的可超过7。
Experts are also figuring out how to breed crops with higher nutrient levels and how to get key nutrients in the food supply, in either salt or cooking oil.
专家们也在探寻如何培育出具备更高营养水平的农作物，以及如何在食物供应里添加关键的营养物质，比如在食盐或者食用油中进行添加。
Experts are also figuring out how to breed crops with higher nutrient levels and how to get key nutrients in the food supply, in either salt or cooking oil.
专家们也在探寻如何培育出具备更高营养水平的农作物，以及如何在食物供应里添加关键的营养物质，比如在食盐或者食用油中进行添加。
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