Abstract: This invention relates to a mouldboard for a plough having active and passive surfaces. The active surface arranged opposite to the passive surface and has extensions in vertical and longitudinal directions. Active surface extends from an upper rim to a lower rim of the mouldboard, and, in a predetermined area, has a geometry configured existing of a number of cross-sections spaced along mouldboard's extension in longitudinal direction and intersecting upper rim of active surface and lower rim of active surface so that each cross-section on active surface in the predetermined area defines a cross-sectional curve. In respect of each cross-section and within the predetermined area of active surface, the cross-sectional curve includes upper and lower cross-sectional parts of the active surface.

Abstract: The invention relates to an agricultural cultivator having a frame (10), which is designed to be self-propelled in a transport direction (T) or to be pulled by a tractor (5) in the transport direction (T), with a part of the frame (10) extending transversely to the transport direction (T) as a support (11), and with a plurality of individually mountable cultivator elements (20), which can be positioned side by side and spaced from one another on the support (11), wherein the support (11) is constructed from a plurality of support sections (12, 13, 14, 15) and has a folding mechanism (30) which enables the support sections (12, 13, 14, 15) to be folded onto one another about folding axes (31, 32, 33) that extend parallel to the transport direction (T). In addition, one or more mounting rails are provided. The mounting rails can be removably mounted on the support. The cultivator elements can be mounted on the mounting rail or rails.