01146naa a2200193 a 450000100080000000500110000800800410001910000180006024501190007826000090019752006020020665000150080865300140082365300210083765300220085870000140088070000150089477300430090916470512023-05-04       1985    bl uuuu     u00u1 u    #d1 aNOORDWIJK, M.  aA new dimension to observations in minirhizotronsbA stereoscopic view on root photographs.h[electronic resource]  c1985  aWith a stereoscope, as used for the inspection of aerial photographs, sequential photographs of roots obtained by the endoscope method from `minirhizotrosn' can yield much more information than hitherto. A series of photographs shows that most of the roots seen in a minirhizotron in grassland grew on the surface of the lexan tube, while there was a gap between the roots and the soil. Decay of the extensive root hair zones around the roots may make new root growth in the gap between rhizotron wall soil invisible. Some consequences of these observations for the endoscope method are discussed.  aroot hairs  aEndoscope  aRoot development  aSoil-root contact1 aJAGER, A.1 aFLORIS, J.  tPlant and Soilgv.86, p.447-453, 1985.