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Seedling growth is also affected by mechanical stimulation, such as by wind or other forms of physical contact, through a process called thigmomorphogenesis. Temperature and light intensity interact as they affect seedling growth; at low light levels about 40 lumens/m 2 a day/night temperature regime of 28 °C/13 °C is effective (Brix 1972). [2]
Chilling requirement. The chilling requirement of a fruit is the minimum period of cold weather after which a fruit-bearing tree will blossom. It is often expressed in chill hours, which can be calculated in different ways, all of which essentially involve adding up the total amount of time in a winter spent at certain temperatures. [1][2]
Warm stratification requires temperatures of 15–20 °C (59–68 °F). In many instances, warm stratification followed by cold stratification requirements can also be met by planting the seeds in summer in a mulched bed for expected germination the following spring. Some seeds may not germinate until the second spring. [citation needed]
Optimum conditions for seedling growth have been determined for the production of containerized planting stock. [32] Alternating day/night temperatures have been found more suitable than a constant temperature; at 400 lumens/m 2 light regime, a 28 °C/20 °C day/night temperatures have been recommended for white spruce.
Germination is the process by which an organism grows from a seed or spore. The term is applied to the sprouting of a seedling from a seed of an angiosperm or gymnosperm, the growth of a sporeling from a spore, such as the spores of fungi, ferns, bacteria, and the growth of the pollen tube from the pollen grain of a seed plant.
Air Plants. An air plant is a great low-maintenance plant because you can display it in so many ways: on a stand, in a terrarium, or mounted on bark. There are two main types. A mesic air plant ...
Managing the tree's available soil volume allows the grower to manage the overall size of the bonsai, and to increase vigor and growth when new branches are required for a planned styling. Temperature: Bonsai roots in pots are exposed to much greater variation in temperature than tree roots deep in the soil. For bonsai from native species ...
To really care for these fascinating eight-legged marine mollusks, you’ll need to ensure they’ve got enough space to swim, lots of live rock, a bed of sand, good quality water and live food ...
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