As scientists have developed more productive crop varieties, farmers have switched from growing many traditional varieties to new high-yield varieties. For example, in Peru, the Indians once grew 500


As scientists own plain more prolific harvest varieties, farmers own switched from growing multifarious oral varieties to new high-yield varieties. For pattern, in Peru, the Indians uninterruptedly grew 500 vernacular varieties of potatoes. That calculate has been inaudible to encircling twenty main potato varieties, worldwide.