The phytogenic field definition is examined, its complex structure is defined (in A. Uranov's understanding), its polycomponent structure is mentioned. The author offers to study the manifestation of such field in material, power-producing and informational aspects. Two groups are singled out: one is transformed by a plant, the other is produced by it. The second group has a signal nature, which makes it prior in the informational component of a phytogenic field. This field's component structure is still not defined and will broaden as the development of our knowledge about plants progresses. The author suggests that four zones and five horizons should be singled out to reveal the heterogeneity of a phytogenic field. Such zoning helps abundantly describe ecological and coenotic manifestations of this field.