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: In a tillage device having first and second plow assemblies mounted in parallel relation on a main frame to thereby cut furrows in the soil creating soil strips in so doing and depositing the soil strips on a berm between the furrows created by the plow assemblies and having a rearwardly located plow assembly for moving the soil under the berm outwardly into the first and second furrows thereby creating a middle furrow and allowing the soil on the berm to fall into the middle furrow.

Abstract: A moldboard plow apparatus having alternate and cooperating moldboards or so-called "scoops". The first of the moldboards digs out and lifts a first soil section from a ground surface thereby forming a first furrow or so-called "cut". The second moldboard or so-called "scoop" cuts and lifts a second soil section thereby forming a second furrow, parallel to and usually adjacent to the first furrow. The moldboards are shaped such that a rearward movement of the soil sections on the respective moldboards causes the soil sections to be inverted and thrown from the moldboards into the opposite furrow in an upside-down condition. Thus the first soil section is thrown into the section furrow and the second soil section is thrown into the first furrow.

Abstract: Apparatus in an agricultural combination machine for simultaneously inserting and positioning in the earth of at least two components, e.g. seed and fertilizer, primarily a combination machine for direct sowing on a field without previous soil cultivation of the ground by ploughing, harrowing or the like, and including a means cutting the earth, e.g. a disc coulter, a knife coulter or the like, and at least two tubular discharge means, one for each component, the cutting means and discharging means extending down into the earth under the earth surface. The means for cutting (2) and means for discharge (5, 6) are removably attached to a coulter arm (1) and to each other to be allowed displacement upwards and downwards such that they are mutually relatively adjustable in depth to given working depths under the earth surface.

Abstract: A variable speed plow bottom has a moldboard structure (37) pivotally connected to a fixed portion which includes a frog (14) and a share (17). The pivotable moldboard structure (37) includes an arm (53) whose forward end (52) is pivotally journaled on a vertical axis (49) in a socket (51) in the point (16) of the frog (14) forwardly of the moldboard (18). The moldboard structure (37) is selectively pivotable about the axis (49) by a hydraulic jack (28) between a low speed plowing position (FIG. 2) and a high speed plowing position (FIG. 3).

Abstract: In a plow, a share having a thickened rearwardly extending mid-section with narrow upper and lower edge portions. The thicker mid-section provides increased share strength and resistance to breakage to improve expected share life. The upper edge portion of the share abuts the moldboard and is provided with a cross sectional thickness consistent with the cross sectional thickness of the moldboard to assure a continuously concave soil working surface over the share and onto the moldboard. The frog support is provided with a flat share supporting surface to reduce frog forming expense and a concave moldboard receiving surface to assure that the moldboard assumes the proper soil working surface when mounted.