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A root ball and the growing medium required to grow a single plant. The medium will be washed and sanitized before being re-used. Under this system, water-tight growing containers are filled with a inert growing medium. A medium can consist of Expanded clay aggregate, rockwool cubes, or other inert materials. This is periodically flooded for a ...
Seedlings, usually sown in rockwool cubes, are transplanted into NFT channels after the emergence of 3 to 4 true leaves. Categorized as a fast-growing crop, approximately 60% of the total leaf area and 70% of the dry biomass are generated in the last 20 days of production.
As the plant embryo grows at germination, it sends out a shoot called a radicle that becomes the primary root, and then penetrates down into the soil.After emergence of the radicle, the hypocotyl emerges and lifts the growing tip (usually including the seed coat) above the ground, bearing the embryonic leaves (called cotyledons), and the plumule that gives rise to the first true leaves.
In most seeds, for example the sunflower, the plumule is a small conical structure without any leaf structure. Growth of the plumule does not occur until the cotyledons have grown above ground. This is epigeal germination. However, in seeds such as the broad bean, a leaf structure is visible on the plumule in the seed. These seeds develop by ...
Seed of Scouler's willow (Salix scouleriana) In botany , the radicle is the first part of a seedling (a growing plant embryo ) to emerge from the seed during the process of germination . [ 1 ] The radicle is the embryonic root of the plant, and grows downward in the soil (the shoot emerges from the plumule ).
It is a measure of germination time course and is usually expressed as a percentage, e.g., an 85% germination rate indicates that about 85 out of 100 seeds will probably germinate under proper conditions over the germination period given. Seed germination rate is determined by the seed genetic composition, morphological features and ...