Method for applying a spray to an agricultural surface by means of at least one spray nozzle unit of an agricultural spraying apparatus, having the steps of: - capturing a first field section (34, 34A-C) of the agricultural surface and a second field section (34, 34A-C), arranged adjacent to the first field section (34, 34A-C) transversely with respect to a direction of travel of the agricultural spraying apparatus, of the agricultural surface by means of at least one optical capture unit (18, 18A-C) in order to obtain a first piece of image information (36, 36A-C) from the first field section (34, 34A-C) and a second piece of image information (36, 36A-C) from the second field section (34, 34A-C), the pieces of image information (36, 36A-C) having a common lateral overlap area with a depth T(overlap) in the direction of travel of the agricultural spraying apparatus; - classifying plants (22, 23) in the obtained pieces of image information (36, 36A-C) by means of the control unit; - determining a first plant metric for a first image evaluation area (40, 40A-C) in the obtained first piece of image information (36, 36A-C) and a second plant metric for a second image evaluation area (40, 40A-C) in the obtained second piece of image information (36, 36A-C) by means of the control unit by using the classified plants in the image evaluation areas (40, 40A-C), the image evaluation areas (40, 40A-C) adjoining one another in the lateral overlap area and having a depth T(evaluate) in the direction of travel of the agricultural spraying apparatus that is less than or equal to the depth of the overlap area T(overlap); and - applying the spray by means of the spray nozzle unit of the agricultural spraying apparatus on the basis of the determined at least one plant metric. - capturing a first field section (34, 34A-C) of the agricultural surface and a second field section (34, 34A-C), arranged adjacent to the first field section (34, 34A-C) transversely with respect to a direction of travel of the agricultural spraying apparatus, of the agricultural surface by means of at least one optical capture unit (18, 18A-C) in order to obtain a first piece of image information (36, 36A-C) from the first field section (34, 34A-C) and a second piece of image information (36, 36A-C) from the second field section (34, 34A-C), the pieces of image information (36, 36A-C) having a common lateral overlap area with a depth T(overlap) in the direction of travel of the agricultural spraying apparatus; - classifying plants (22, 23) in the obtained pieces of image information (36, 36A-C) by means of the control unit; - determining a first plant metric for a first image evaluation area (40, 40A-C) in the obtained first piece of image information (36, 36A-C) and a second plant metric for a second image evaluation area (40, 40A-C) in the obtained second piece of image information (36, 36A-C) by means of the control unit by using the classified plants in the image evaluation areas (40, 40A-C), the image evaluation areas (40, 40A-C) adjoining one another in the lateral overlap area and having a depth T(evaluate) in the direction of travel of the agricultural spraying apparatus that is less than or equal to the depth of the overlap area T(overlap); and - applying the spray by means of the spray nozzle unit of the agricultural spraying apparatus on the basis of the determined at least one plant metric.