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Growing degrees (GDs) is defined as the number of temperature degrees above a certain threshold base temperature, which varies among crop species. The base temperature is that temperature below which plant growth is zero. GDs are calculated each day as maximum temperature plus the minimum temperature divided by 2, minus the base temperature.
This grass favours high-salinity waters with low turbidity, such as calm lagoons. It cannot grow in fresh water but some growth is possible at a salinity of 10 parts per thousand. The plant's preferred salinity range is 25 to 38.5 parts per thousand with a temperature range of 20 to 30 °C (68 to 86 °F).
It is also known as timothy-grass, meadow cat's-tail or common cat's tail. [3] It is a member of the genus Phleum , consisting of about 15 species of annual and perennial grasses. It is probably named after Timothy Hanson, an American farmer and agriculturalist said to have introduced it from New England to the southern states in the early 18th ...
The grass can reach a height of 7-8 meters after 4 months of growth. [6] It produces best growth between 25 and 40 °C, and little growth below about 15 °C, with growth ceasing at 10 °C. Tops are killed by frost, but plants re-grow with the onset of warm, moist conditions. Napier grass grows from sea level to over 2,000 m elevation. [7]
Warm season grasses only start growth at temperatures above 10 °C (50 °F), and grow fastest when temperatures are between 25 °C (77 °F) and 35 °C (95 °F), with one long growth period over the spring and summer (Huxley 1992). They often go dormant in cooler months, turning shades of tan or brown.
The grass type to choose entirely depends on your geographic location. Mann said the United States is divided into two geographic regions when it comes to turf grasses: cool season and warm season.
The grass occurs on both sides of the Atlantic Ocean, [1] including much of the southeastern United States, Texas, [2] [3] Mexico, and Central and South America. [1] It has escaped cultivation in California, [4] Hawaii, many Pacific islands, South Africa and New Zealand. [1] [5] St. Augustine grass occurs in most Caribbean and Mediterranean ...
Unlike Kentucky blue grass, buffalograss is a warm-season grass, [12] a group of grasses that grows better at temperatures above 15 °C (59 °F). [13] As a warm season grass it becomes green late in the spring and dries out early in the fall. [8] The dried leaves and inflorescence stalks persist through the dormant period, turning a light ...