The Provisional Administration did not have the power, even if it had had the will, to prevent so popular a movement as the seizure of vacant Turkish land, but nor could the Administration allow this movement to go completely unchecked for this would give the Turks and the British the excuse to interfere in the internal affairs of the liberated territories. Given these dangers the Russians handled the agrarian problem with considerable skill. In the summer of 1877 Bulgarian refugees from Macedonia, Thrace and Ottoman Rumelia had been allowed to harvest the crops left by Turkish émigrés and in September all Bulgarians, the incoming refugees and the indigenous, were allowed to sow vacant Turkish land, though it was insisted that this did not in any way signify a transfer of ownership. With the mass exodus of Turks after the Treaty of San Stefano the Provisional Administration had little choice but to allow the Bulgarians to work the vacant land with rent, set at half the value of the harvest, to be paid to the legal owner. In many cases the Bulgarians simply refused to pay this rent and the Russians were not over-zealous in collecting it.