The statement that is not a merit of organic farming is: It has a shorter shelf life.

Explanation:

One of the potential challenges of organic farming is that organic products might have a shorter shelf life compared to conventionally grown products. This is because organic farming often involves fewer preservatives and synthetic chemicals, which can contribute to a shorter shelf life. While there are advantages to organic farming, such as potential environmental benefits and health considerations, the shorter shelf life is not typically considered a merit.