I am not an expert but I did find a few things. Everything I found is about grains, specifically wheat, rye, barley, and oats. I tried to find things on the other plants you asked about, but could not find anything I deemed of use. I don't know if what I found will be of any use, but here it is:
The most common means of calculating yield was the number of seeds harvested compared to the number of seeds planted. On several manors in Sussex England, for example, the average yield for the years 1350–1399 was 4.34 seeds produced for each seed sown for wheat, 4.01 for barley, and 2.87 for oats. https://en.wikipedia.org/wiki/Agriculture_in_the_Middle_Ages#Fields
The average yield of an acre of farming in the Middle Ages was eight to nine bushels of grain. 130
http://www.thefinertimes.com/Middle-Ages/farming-in-the-middle-ages.html
Rye = seven-fold render (7 bushels on one acre); does better in poor soil Wheat = 5-fold render (5 bu/acre) in poor soils.. https://www.ibiblio.org/london/agriculture/general/1/msg00070.html
For more info on grain planting: http://www.fao.org/3/y5146e/y5146e07.htm
* They knew that wheat would yield 250 to 300 liters of grain per acre -
* Barley would bring 700-720 liters per acre. (The higher yield for barley was partially the nature of the plant, plus the fact that you put 72 liters of seed into each acre of wheat and 144 liters per acre of barley.)
* Oats yielded <PHONE_NUMBER> liters an acre, for 108 liters of seed.
* Peas, an important diet supplement and protein source, gave 300-340 liters per acre, for 108 liters of seed.
* Flax and hemp was also grown, to provide raw material for linen and rope.
* Depending on the nature of the land, the size of the farmers holdings, local weather conditions, and drinking habits, about half the land would be sown in barley.
* In ale drinking areas (most of England and large parts of France), barley would be needed for making ale.
* Barley was also a more productive grain, even though it produced a less tasty meal than wheat.
* A third (or more) of the land would be planted in wheat. The remainder would go for peas and oats.
* Grain yields of slightly under four times seed grain sown were the norm until the 18th century.(So take your yeild and divide by four of under)
* There, another burst of innovation brought productivity to ten times seed sown.. In the 20th century, this rose to twenty times. http://www.hundredyearswar.com/Books/History/Agricult.htm 130