How to grow vegetables bigger than their normal sizes.

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I've seen a documentary at discovery channel about growing super big vegetables and fruits by applying enzymes extracts from different vegetables and fruits.The country that have this technology is the Department of Agriculture in Japan.I'm realy interested to try to grow it myself.But i dont know how can i acquire this trade secret.I have a farm and i practice organic farming but i'm not satisfied with the size of my harvest. please help me find ways to improve my yield.