Got to put my 2-cents worth in here since I plowed a lot of land with a 2-14 plow behind a JD tractor when I was growing up. Everybody used moldboard plows then. One man I knew made a living just sharpening plow shares for farmers.
For a person who has never plowed with a moldboard plow, but is now going to start, there are two important points: the plow must be adjusted to where each share is cutting at the same depth. Too complicated to describe here on how to adjust the plow - just stop out in the middle of the field and carefully dig with a square-point shovel, behind the plow, down to the depth of the cut of each plowshare. If you dig carefully, keeping the shovel level, you'll easily see how much is needed to adjust the plow depth-levers to get an even cut.
Second, you must be careful to establish "live furrow" (where the dirt, on the second trip through the field, is thrown up against the dirt from the first trip through the field) and the "dead furrow" (where the plow, being pulled in one direction, is up against freshly turned dirt on its left side, leaving a "ditch" type appearance in the field. It is every important that the next plowing (next year?) of the field be started by plowing a "live furrow" over the top of the old "dead furrow". This keeps the ground across the field level. And, if a real good job of plowing is done your new plowing of the field will result in the new "dead furrow" being done at the same location of the old "live furrow"