When a fodder crop rotation goes through a pasture block that is also having supplements removed, the actual supplements removed per ha is reflected on that block in the pasture/crops input tab.
Increasing the rotation area means that there is less area that pasture is grown on therefore if the fodder crop rotation increases and the total amount of supplement removed stays the same, the KgDM/ha will increase.
If the total amount of supplement removed decreases, this will result in a decrease in KgDM/ha of supplement removed.
KgDM/ha of supplement removed calculated on the Pasture/crops tab differs to that calculated in the Supplement input tab. When supplement in the Supplements tab is harvest from a block it is basing the KgDM/ha off the total area of the block.
The image below is showing the weight/ha for the same block as the image above but at the Supplements inputs tab.