But even mulch has its limits. Natural resource specialists point out that weeds can be transported in mulch. This is also true of soil, grain, hay and animals.

但是，地膜也有其局限性。自然资源专家指出，杂草可以在地膜里传播，还可以通过土壤，谷物，干草和动物传播。

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Typical agreements only apply for three years, at which point the vendor is free to make hay with your idea, if you haven't managed to secure a patent by then.

FORBES: Protect Your Prototype

"From my point of view it's unlikely that I'll be involved at the club, " Hay told BBC Sport on Saturday.

BBC: Livi manager Davie Hay