Ca absorption and tipburn of lettuce were studied under different application of n, k, ca, sprinkler irrigation and border irrigation in open field.

在露地栽培条件下，研究了不同氮、钾、钙水平处理以及喷灌、畦灌对生菜钙吸收和干烧心的影响。

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Daly, who needs a strong finish to earn an exemption to the US Open, bogeyed his final hole when he tried to putt between two sprinkler heads on the ninth.

BBC: SPORT | Golf | Toms edges clear in St Jude