Cost comparisons
Looking at the cost analysis of these mixtures, it is very much weighted on the sowing rates, not just on the cost per kg. For example, the Radish comes in at a relatively high per kg price, but at a low sowing rate of 10kg/ha, this becomes a cost effective crop. Comparably, Buckwheat is far cheaper per kg, but at a higher sowing rate of 70kg/ha, this can become more costly. Ultimately, it comes down the requirements, how it fits in with the rotation and the longevity desired of the cover.
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