The effect of catch crops depends on a good establishment.
With increased row spacing, it is possible to establish at the last weed control in the row .
Increased row distance requires weed control in the row, but this results in later sowing of the catch crop. Red clover has the most stable establishment at all times of sowing. Common vetch is not suited for the row cultivation system. Delayed sowing may result in a well established catch crop, especially after one weed control. However, your choice of strategy depends on the crop, level of nutrition, weather and the composition of the weed flora – annual and/or perennial, amount and agressiveness.