Yeah Perhaps Boerenlater,
From the Guardian:
However, Pavel Felgenhauer, a Moscow-based military expert, said he did not expect to see long columns of Russian tanks rolling across the black earth border regions into eastern Ukraine.
"The time of year for serious warfare is totally wrong," he said. "This is black soil area and at this time of year it's wet, wet, wet. The Germans found that. They'll have to wait until June for it to dry up or they won't be able to move off the roads."