B.
No persons, firm or corporation shall strip, excavate or otherwise remove topsoil for sale or other use other than on the premises from which taken, except in connection with the construction or alteration of a building on such premises and excavating or grading incidental thereto, except as hereinafter specified.
C.
Existing natural features such as trees, brooks, drainage channels and views shall be retained. Whenever such features interfere with the proposed use of such property, a retention of the maximum amount of such features consistent with the use of the property shall be required.