DENDROLOGY

Detailed explanation-1: -yams, sweet potato, and cocoyams, the four most important tropical root and tuber crops, has other constraints as well: inadequate water supply (in arid areas with optimal solar-radiation levels); pests and diseases; long maturation; and difficult-to-harvest roots and tubers with poor keeping quality.

Detailed explanation-2: -Cassava also scientifically known as Manihot esculenta is a common root vegetable also referred to as manioc or yuca in Latin American countries. Cassavas are a highly nutritious starchy root originating in South America and a fan favourite in many tropical and subtropical regions across the globe.

Detailed explanation-3: -The tropical root crops cover a number of different starchy staple plants of which cassava, tropical sweet potato, the edible aroids and yams are the most important.