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Rick: Rod has the best description, some plows have more options than others. I'll start from opposite direction from Rod and between us you should have an answer. The plow beam being the arm from frame, all plow bottoms bolt to. To that you mount the frog and all wear parts except coulter bolt to the frog. The landside is just what its name implies, flat plate along land side. Some of these landsides are longer than others. The long one going on the left bottom. Share-point can be one piece or two piece. Like Rod said the point usually wears faster, however the two piece is usually more expensive. I use one piece share-points and just weld a section of truck spring on to replace point. I had an experience 40 years ago with an IH plow with 2 piece share-point. Point would not stay tight, and when you lost one, you burried it. Today Rod is using much more modern technology and they do stay tight. Moldboards again can be one piece or two piece. the shin in all cases is the front end of moldboard. Some plows have a replacable shin, just a 3-4 inch section of moldboard. Very noticable, the dividing line between the two. Some plows have trash plates, just a 1/4 size of moldboard with more curve and bolted to plow beam, above the moldboard and designed to throw trash like corn stalks under the furrow being plowed. Some moldboards have a curved plate extension at back, quite often used in turning tough soil. On older plows you will quite often find jointers. They bolt to coulter and were designed to cut the edge off furrow being turned in sod plowing. Cutting that top edge off burried the grass with it, thus if weather stayed warm after plowing one didn't get grass growing along top edge of furrow. A lot of folks confuse trash plates with jointers. Jointers will actually hinder you if plowing down trash. When a farmer switched from sod plowing to corn stalks, off came the jointers, those who didn't uttered a lot of 4 letter words. Trash plates on the other hand will usually not interfere with sod plowing, without trash, nothing touches them.
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