Category: Encyclopedia
Uneven Span Greenhouse
What does Uneven Span Greenhouse mean? An uneven-span greenhouse is a greenhouse with one roof slope longer than the other. This is generally an adaptation of a regular greenhouse when it is situated on a a hilly terrain or to take advantage of solar angles. In uneven-span greenhouses, the roof is not equal in width or pitch, […]
Undercut
What does Undercut mean? An undercut is a particular type of cut made to a tree branch or trunk. Undercutting is often used when trimming or pruning a tree. This method is used to minimize damage to the tree during pruning. To undercut a tree branch, a cut is made through one-third to one-half of the branch, […]
Umbel
What does Umbel mean? An umbel is a cluster of flowers that consists of short flower stalks, or pedicels, that spread from a common point. This cluster closely resembles the ribs or spokes of an umbrella. Umbels can be made up of compound or simple clusters. The size of these clusters can vary, and the shape can […]
Ultraviolet B (UVB)
What does Ultraviolet B (UVB) mean? Ultraviolet light refers to electronic radiation that has a longer wavelength than X-rays, but shorter than visible light. This natural light is produced by the sun, but it is often artificially replicated in indoor gardens to encourage plant growth and development. While Ultraviolet B only makes up around 0.15% of natural […]
Ultraviolet A (UVA)
What does Ultraviolet A (UVA) mean? Ultraviolet light refers to electronic radiation that has a longer wavelength than X-rays, but shorter than visible light. This natural light is produced by the sun, but it is often artificially replicated in indoor gardens to encourage plant growth and development. Ultraviolet A lighting or rays refers to long-wave, black light […]
Ultrasonic repeller
What does Ultrasonic repeller mean? Pests are the bane of outdoor gardeners, but an ultrasonic repeller may be able to repel many types. This includes insects and rodents, preventing them from damaging your crops. More Info on Ultrasonic repeller Pests have plagued gardeners since the Agricultural Revolution. Hordes of: locusts, mice and other rodents, deer – the list […]
Ultrasonic Fogger
What does Ultrasonic Fogger mean? Commonly used in hydroponic systems, ultrasonic foggers are designed to create a fine mist that carries nutrients to the plants’ roots. These improve oxygen flow to the roots while creating a humid atmosphere for the plants to thrive in and grow. Depending on the type of crop, this apparatus can be used […]
Turgor
What does Turgor mean? The term turgor refers to the water pressure within a plant’s cells. Osmosis helps maintain a plant’s cellular turgor, and the membrane of the plant’s cells controls the turgor. Water passes through the membrane into the middle of the cell and then back out. However, the membrane does not allow salts or nutrients […]
Tungsten (W)
What does Tungsten (W) mean? Tungsten is a hard, heavy metal that is ideal for electrical conduction because of its high melting point. As a result, it is commonly used to make filaments in incandescent and halogen grow lights that are often used in areas where plants do not receive any natural light, such as during winter […]
Tuber
What does Tuber mean? A tuber is a part of the plant that grows beneath the soil’s surface. The tuber is used by the plant to store valuable nutrients and water. The reserve of a tuber’s nutrients and energy are used by the plant during periods of drought or during the winter months. There are two types […]
