This research was conducted to (1) Find out the manifestation of Momosad cultural values applied to the management of plantation and rice field farming, (2) Describe the factors of change in Momosad cultural values in plantation and rice field farming management, (3) Analyze the pattern of changes in values -Contemporary Momosad Cultural values. This research applies a qualitative approach using the Miles and Huberman Model, data collection was carried out by interviewing sources (and informants), field observation and documentation; Data processing is carried out using triangulation rules. The sources were farmers/farm laborers, village community leaders, religious leaders, village heads, informants who were considered to know and master information about changes in Momosad cultural values in the management of plantations and rice fields. The manifestation of Momosad cultural values in agricultural production activities in Dumoga is in the form of: (1) Pure Momosad, (2). Semi-Momosad and (3). Not Momosad (Commercial Culture) Pure Momosad is an activity that uses labor from close family/relatives, acquaintances, friends, and/or neighbors, in limited quantities according to a relatively small volume of work. Semi Momosad is a farming activity that involves labor from family, friends, neighbors and/or acquaintances, with an imbalance in wages according to the type of work, but still below the commercial wage level. Not Momosad (Commercial Culture), namely employment activities in rice farming which still pay attention to the values of agreement, dependency values, motivation values and togetherness values, but with an imbalance in wages following the commercial wage level. The factors that influence changes in Momosad in Dumoga can be divided into three periods (epochs or periods), namely (1) Pre-Colonial, (2) Colonial (3) Development and Regional Autonomy