An agricultural work machine, comprising: a communication system configured to receive a prior information map that includes values of a first agricultural characteristic from a prior agricultural operation corresponding to different geographic locations in a field; a geographic position sensor configured to detect a geographic location of the agricultural work machine; an in-situ sensor configured to detect a value of a second agricultural characteristic corresponding to the geographic location; a predictive model generator configured to generate a predictive agricultural model that models a relationship between the first agricultural characteristic and the second agricultural characteristic based on a value of the first agricultural characteristic in the prior information map at the geographic location and the value of the second agricultural characteristic sensed by the in-situ sensor at the geographic location; and a predictive map generator configured to generate a functional predictive agricultural map of the field, that maps predictive values of the second agricultural characteristic to the different geographic locations in the field, based on the values of the first agricultural characteristic in the prior information map and based on the predictive agricultural model, wherein the predictive map generator is configured to configure the functional predictive agricultural map for consumption by a control system configured to generate control signals to control a controllable subsystem on the agricultural work machine based on the functional predictive agricultural map, and the control system configured to generate the control signals. a communication system configured to receive a prior information map that includes values of a first agricultural characteristic from a prior agricultural operation corresponding to different geographic locations in a field; a geographic position sensor configured to detect a geographic location of the agricultural work machine; an in-situ sensor configured to detect a value of a second agricultural characteristic corresponding to the geographic location; a predictive model generator configured to generate a predictive agricultural model that models a relationship between the first agricultural characteristic and the second agricultural characteristic based on a value of the first agricultural characteristic in the prior information map at the geographic location and the value of the second agricultural characteristic sensed by the in-situ sensor at the geographic location; and a predictive map generator configured to generate a functional predictive agricultural map of the field, that maps predictive values of the second agricultural characteristic to the different geographic locations in the field, based on the values of the first agricultural characteristic in the prior information map and based on the predictive agricultural model, wherein the predictive map generator is configured to configure the functional predictive agricultural map for consumption by a control system configured to generate control signals to control a controllable subsystem on the agricultural work machine based on the functional predictive agricultural map, and the control system configured to generate the control signals.