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Oca is cultivated primarily for its edible stem tuber, but the leaves and young shoots can also be eaten as a green vegetable. Mature stems can be used similarly to rhubarb. [13] Andean communities have various methods to process and prepare tubers, and in Mexico oca is eaten raw with salt, lemon, and hot pepper. [3]
A geophyte (earth+plant) is a plant with an underground storage organ including true bulbs, corms, tubers, tuberous roots, enlarged hypocotyls, and rhizomes. Most plants with underground stems are geophytes but not all plants that are geophytes have underground stems. Geophytes are often physiologically active even when they lack leaves.
Yam harvesting is labor-intensive and physically demanding. Tuber harvesting involves standing, bending, squatting, and sometimes sitting on the ground depending on the size of mound, size of tuber, or depth of tuber penetration. Care must be taken to avoid damage to the tuber, because damaged tubers do not store well and spoil rapidly.
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The tuber is the primary edible part, but the leaf is also used and is similar to spinach. [4] They are known to contain high levels of protein, calcium, and carotene. Ulluco was used by the Incas prior to the arrival of Europeans in South America. [5] The scrambling herbaceous plant grows up to 50 cm (20 in) high and forms starchy tubers below ...
The offspring or new tubers are attached to a parent tuber or form at the end of a hypogeogenous (initiated below ground) rhizome. In the autumn the plant dies, except for the new offspring tubers, which have one dominant bud that in spring regrows a new shoot producing stems and leaves; in summer the tubers decay and new tubers begin to grow.