In order to promote plant growth, experts recommend that gardeners spread a generous amount of mulch around the plants to inhibit weed growth. Accordingly, the director of Sunlight Community Garden instructed volunteers to use plenty of mulch in their yearly landscaping, and the volunteers enthusiastically used up all of the available mulch. Nevertheless, plant productivity later fell somewhat.
Which of the following, if true, most helps to explain why acting on the experts’ recommendation failed to achieve its goal?
【选项】
Sunlight Community Garden often runs out of vegetables at its farm stand because yield is not high enough to meet demand.
选项是否正确？