Environmental requirements.
Requirements for the life that one or another form is presented in accordance with its constitution at home, as well as in new habitats should not go beyond certain boundaries, even if over time these boundaries are often expanded by mating and breeding.
Place of origin of many useful plants were intertidal habitat types. Frequently used term "cultural landscape with fields," biologically does not always justified, as it seems at first glance. As wild cabbage (Brassica oleracea), and Beta maritima, the original form of sugar and fodder beet growing on the shores of the Mediterranean Sea and Atlantic Ocean. If you know the preferred habitats, it will be understood that rape, kale and sugar beets because of their endurance to the presence of salt in the soil can be successfully grown in the newly reclaimed from the sea shore stations in Schleswig-Holstein, the opportunity to accelerate the use of arable land of the [666]. Moisture-loving, unsuitable for the conditions of the steppe culture plant is red clover (Trifolium pratense), which, though a local plant for large areas of Eurasia, but as the culture was imported to Germany only in the XIV century in northern Italy and Switzerland, and in the XVI century, through Spain and Flanders. In any case in Germany, he began to widely cultivate only in the XVIII century. and in France - in the XIX century. White clover, which is the beginning of culture in Central Europe, is about the same time; have long been raised on natural grasslands of Eurasia. Cultural groups from oat Avena sativa, closely related to wild oats, appeared in Central and Western Europe as a weed in cereal crops, moving along the floodplains of Western Asia and Eastern Europe. It grows on all soils with sufficient water retention and if during the growing season falls right in precipitation. Oats needed in fairly large quantities of manganese, which are abundant there was for him in sediments of major rivers - the primary habitat of oats. Sugar beet plant as the sea coast, in contrast, requires a lot of boron
. Often the resulting lack of these micronutrients in these developmental disorders of plants is not difficult to understand, if you remember this.