Abstract: An agricultural field management system includes a first sensor to generate first field work data indicating field conditions of an agricultural field and a second sensor to generate second field work data indicating crop conditions. A computer includes a memory configured to store a field database in which data are segmented by: a field map layer in which field shape data defining a shape of an agricultural field are stored; a first field work layer in which the first field work data are stored; and a second field work layer in which the second field work data are stored. The agricultural field is divided into common field blocks in the field map layer, in the first field work layer, and in the second field work layer such that the field conditions in the common field blocks are annually correlated with the crop conditions in the common field blocks, respectively.

Abstract: An agricultural field management system includes a map data recording section having a field map layer for recording field map data, a field work data recording section having a machine-type-specific field work layer for recording field work data generated for each work implemented by various kinds of farm work machine on the field, a data management section 60 for executing data management on the field map data and the field work data at a common coordinate position, and an evaluation section 70 for effecting farming evaluation of the field based on the field work data.

Abstract: A farm work planning assistance system includes a field information storage section 6 configured to individually take in farm work information of fields of farming entities distributed over a wide area and to store the information as field information in combination with agro-environment information assigned to the respective fields, a farm work plan calculation section 7 configured to use, as an input parameter, farm work target information sent from each farming entity for a subject field as a subject for a farm work to be done by this farming entity and to extract farm work plan information for the subject field by referring to the field information, and an information output section 52 configured to output the extracted farm work plan information to the farming entity.