The LBK package included two varieties of wheat, assorted other fruits, pottery of the LBK type and cattle. The loess that was originally utilized were thun strips of land bordered by gennarlly dense pine forests as Europe was just coming pit of the orbiroeal period, the pine soils were pretty much terrible for agriculture. There has been speculation that the einkorn wheat that was used was largely as a fodder crop, much like we use winter rye as a fidder crop now. Cattle were an essential element of LBK and, in fact, the presence of cheese fats in the British Ilse precedes evidence of grain cultivation, the earliest settlers to Ireland appeared not to have grown crops at all, originally focusing only on cattle and later drafting cereals typical of early western europe and africa. Bread wheat is not suitable for much of northern Europe.
The bigger problem in the Neolithic was stable soil improvement, cows can graze and be rotated, they can be traded on the hoof for other sources of nutrition, like seafood from mesolithic hunter gatherers (the healthy ones).