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Prism dioptres. Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]
Heterophoria is an eye condition in which the directions that the eyes are pointing at rest position, when not performing binocular fusion, are not the same as each other, or, "not straight". This condition can be esophoria, where the eyes tend to cross inward in the absence of fusion; exophoria, in which they diverge; or hyperphoria, in which ...
Esotropia is a form of strabismus in which one or both eyes turn inward. The condition can be constantly present, or occur intermittently, and can give the affected individual a "cross-eyed" appearance. [1] It is the opposite of exotropia and usually involves more severe axis deviation than esophoria. Esotropia is sometimes erroneously called ...
There are two main mechanisms of sexual selection in flowering plants, one being intra-sexual competition and the other being female mate choice. Intra-sexual selection is responsible for much of floral evolution and diversification. Intrasexual selection, with the help of pollinators, has also led to some of the most remarkable examples of ...
Heterostyly is a unique form of polymorphism and herkogamy in flowers. In a heterostylous species, two or three morphological types of flowers, termed "morphs", exist in the population. On each individual plant, all flowers share the same morph. The flower morphs differ in the lengths of the pistil and stamens, and these traits are not continuous.
But spare a thought for the team from Wales which has set itself the challenge of using more than 300 different species of plants. The Size of Wales garden is thought to be the most biodiverse ...
Alstroemeria 'Saturne'. Alstroemeria ( / ˌælstrɪˈmɪəriə / ), commonly called the Peruvian lily or lily of the Incas, is a genus of flowering plants in the family Alstroemeriaceae. They are all native to South America, although some have become naturalized in the United States, Mexico, Australia, New Zealand, Madeira and the Canary Islands.
Amazon's first-ever spring Prime Day sale includes up to 50 percent off garden essentials. Score deals on flower pots, vegetable seeds, garden beds, and more.
Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun . The habit of some plants to move in the direction of the Sun, a form of tropism, was already known by the Ancient Greeks. They named one of those plants after that property Heliotropium, meaning "sun turn".
So a net 1.5 in height will provide a trellis or espalier between 1.80 and 1.90 m (so the post sizes should be around 2.2 and 2.5 m), and this would be the ideal support system measurement for most cucumber open field varieties. The ideal size for square mesh is approx. 25x25 cm. Pruning and harvesting is easy when using a 25x25cm (10"x10 ...