Which of the following options is not a benefit of intercropping?

Options (2), (3) and (4) are benefits of intercropping as in this technique, we grow two crops. Out of the two, one is resistant to the pest and diseases and the crop is laid in a fixed pattern. It stops pests and diseases from spreading. Therefore, (2) is a benefit of intercropping system. Also, returns from both the crops will be better as both of these have different nutrient requirements and do not have to compete for survival. Therefore, (3) is also an advantage. Restriction in spread of disease will also reduce the risk of damaging both the crops. Minimum utilization of the nutrients supplied is not an advantage as it would lead to accumulation of mineral ions in the soil. Intercropping ensures maximum utilization of nutrients because both the crops have different nutrient requirements. If the nutrients do not get completely utilized, they get accumulated in the soil and result in pollution of water resources, destruction of microorganisms and friendly insects, crop susceptibility to disease attack and acidification or alkalization of the soil.