Читать книгу The Circle of Knowledge: A Classified, Simplified, Visualized Book of Answers - Various - Страница 177

In the temperate regions of the world wheat is the principal cereal grown, and there are many different varieties suited to varying conditions. As we go farther north, barley, oats and rye increase in importance, and although they are grown for special purposes along with wheat, it is important to note that they will thrive in countries and under conditions not suited to wheat. Starting again from the temperate zones and traveling north or south, as the case may be, we enter the warmer countries where wheat cultivation is often associated with that of rice, corn, sorghum, etc. In the tropics, however, wheat will not thrive at low elevations, but rice, corn, sorghum and various millets form the great cereal crops, their relative importance varying in different countries.

The grasses proper grow upon our meadows, pastures, fields and in the woods and are only used as food for cattle.