No matter whether gross or net calculations are used, and no matter whether the contribution from the rape cakes is included or excluded, the conclusion is that the energy balance is strongly positive.

Today, agriculture has a gross energy consumption which in fact is more than twice the existing energy production from agricultural biomass...........
.....With conventional cultivation of winter rape, the total fuel consumption of the Danish agricultural industry could be covered on a good 10% of the agricultural area along with covering 20% of the protein fodder consumption and 81% of agriculture's total gross energy consumption.

From a general consideration of sustainability, it would be natural to run agriculture, and especially organic agriculture, without a resulting use of energy, i.e. with a positive energy balance.
However, presently the agricultural industry has a negative energy balance with a gross energy consumption which is more than twice the existing energy production from agricultural biomass; especially there is no energy production to outbalance the agricultural diesel consumption.

In 1930, 25% of the Danish arable land was used to feed the workhorses.