HTO was also migrated to the adjacent land soil and absorbed by land crop plants, within one and half months the land system contained 24% of the total tritium in the aquatic system.

HTO还明显地向毗邻的陆地和作物迁移，在一个半月期间，陆地系统中的总氚约占水体的24%。

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Tobacco is an important economic crop in China and fertilization is one of the key technologies of tobacco cultivation system.

烟草是我国一种重要的经济作物，而施肥是烤烟栽培的关键技术之一。

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Using this system, crop yields go up dramatically, from one tonne to four tonnes of maize per hectare in a good year, and from zero to a tonne in a drought.

ECONOMIST: A new twist on an old idea is improving farm yields in Africa