'Grain' in the Bible

And it happened that he was going through the grain fields on the Sabbath, and his disciples began to make [their] way [while] plucking off the heads of grain.

And other [seed] fell among the thorn plants, and the thorn plants came up and choked it, and it did not produce grain.

And other [seed] fell on the good soil, and produced grain, coming up and increasing, and it bore [a crop]--one thirty and one sixty and one a hundred [times as much].

By itself the soil produces a crop: first the grass, then the head of grain, then the full grain in the head.