Identify the one which is not an advantage of intercropping.

Question

$\begin{array}{1 1} (a)\; \text{Save time and labour} \\ (b)\; \text{Farmers can harvest and thresh both the crops separately} \\ (c)\; \text{Farmers cannot apply fertilizers as per the need of the individual crop} \\ (d)\; \text{Farmers can apply pesticide as per the need of the crop} \end{array}$