Cover Image
close this book Grazing and rangeland development for livestock production
close this folder Management of rangelands and other grazing lands of the tropics and subtropics for support of livestock production. Technical Series Bulletin No. 23
close this folder II. Inventory of the natural resources base of permanent grasslands.
close this folder 1. Climate.
View the document a. Rainfall.
View the document b. Sunlight.
View the document c. Temperatures.
View the document d. Evaporation and humidity.
View the document e. Length of the dry season.
View the document f. Monsoon climates.
View the document g. Mediterranean climates.
View the document h. Categories of climates

b. Sunlight.

Sunlight in the tropics and subtropics, influences plant growth through the intensity of solar energy, the light quality (higher in ultraviolet rays than in temperate zones), and the length of daylight periods. Many tropical plant species are poorly adapted to the temperate zones which have longer days in summer and shorter days in winter. Thus, some entire plant species, and some varieties within widely distributed species are either adapted to temperate zone lengths-of-day, or to tropical zone lengths-of day (11 to 13 hours day length).