Abstract: A seeding tool for depositing seeds and fertilizer within a furrow including a knife opener having a liquid wing projecting from the side thereof for providing and maintaining spacing between the seeds and fertilizer. Preferably, the liquid wing is a tungsten carbide insert secured to the side of the knife opener, and has a wing shaped structure which is shaped and sized to space the fertilizer apart from the seeds, to protect the end of the tube from which fertilizer is dispensed, and to present a small leading surface which displaces the soil easily and presents minimal resistance. Preferably, the largest, side surface of the liquid wing insert is inclined toward the side of the knife opener from a widest lower, rear member adjacent the end of the fertilizer tube to a narrower top, front member near a leading end of the knife opener.

Abstract: A tapered adaptor (10) disposed at a free, leading end of a cultivator shank (S) is arranged to co-operate with a blocking member (27). The blocking member (27) defines forwardly facing abutment surfaces (28, 29). They engage a rear edge portion (54) of the socket (46) of a sweep when the sweep is subjected to a hard impact which would otherwise force the socket beyond the position required for a firm wedging frictional grip with the adaptor (10). Thus, the undesired displacement excessively beyond the required grip position is prevented to enable removal of the socket (46) on exchange of the sweep by a hammer blow. A retainer pin (32) is resiliently held in a transverse groove (31) by the nose (35, 36) of a pair of flat springs. Thus the free movement which might result in loss of the pin 32 is prevented while allowing relatively easy withdrawal of the pin when the sweep is to be knocked off the adaptor. Several alternative embodiments are mentioned.