90th Birth Anniversary of Nikolai Vavilov (1887-1943) (Soviet Union, USSR 1977)

Stamp 90th Birth Anniversary of Nikolai Vavilov (1887-1943) it reflects the thematic directions:

A scientist is a person who researches to advance knowledge in an area of the natural sciences

Botanists study how plants produce food and how to increase yields, for example through plant breeding, making their work important to humanity's ability to feed the world and provide food security for future generations.

A cereal is a grass cultivated for its edible grain. Cereals are the world's largest crops, and are therefore staple foods. They include rice, wheat, rye, oats, barley, millet, and maize. Edible grains from other plant families, such as buckwheat and quinoa are pseudocereals. Most cereals are annuals, producing one crop from each planting, though rice is sometimes grown as a perennial. Winter varieties are hardy enough to be planted in the autumn, becoming dormant in the winter, and harvested in spring or early summer; spring varieties are planted in spring and harvested in late summer. The term cereal is derived from the name of the Roman goddess of grain crops and fertility of grain crops and fertility