Segundo, Colorado in 1846. Guano Guano (Spanish from ) is the accumulated excrement of seabirds and bats. As a manure, guano is a highly effective fertilizer due to its exceptionally high content of nitrogen, phosphate, and potassium: key nutrients essential for plant growth. Guano was also, to a lesser extent, sought for the production of gunpowder and other explosive materials. The 19th-century guano trade played a pivotal role in the development of modern input-intensive farming, but its demand began to decline after the discovery of the Haber–Bosch process of nitrogen fixing led to the production of synthetic fertilizers. The demand 	Guano
24440606	Segundo, Colorado Segundo, Colorado Segundo is an unincorporated community and a census-designated place (CDP) located in and governed by Las Animas County, Colorado, United States. The population of the Segundo CDP was 98 at the United States Census 2010. The Trinidad post office (Zip Code 81082) serves the area. History. Segundo was founded by Colorado Fuel and Iron (CF&I) as a company town to house its workers for a local coal mine. The town was the second mining community developed by CF&I in 1904 behind Primero and was referenced in the town's name, with segundo" meaning "second" in Spanish. CF&I  offered adequate housing for the time, and promoted upward mobility through its sponsorship of a YMCA center, an elementary school, small businesses, and a company store. Segundo was a prosperous town until the 1920s, when the population began to decline due to constant health issues related to air pollution and outdated housing that lacked indoor plumbing. Declines in demand for metallurgical coke led to workers being laid off and, following a major fire in 1929, CF&I ceased their operations in Segundo. The town's population plummeted to the point that it almost became a ghost town. Geography. Segundo is located  west of Trinidad along Colorado State Highway 12 in the valley of the Purgatoire River. The Segundo CDP has an area of , all land. Demographics. The United States Census Bureau initially defined the for the Segundo, Colorado Segundo is an unincorporated community and a census-designated place (CDP) located in and governed by Las Animas County, Colorado, United States. The population of the Segundo CDP was 98 at the United States Census 2010. The Trinidad post office (Zip Code 81082) serves the area. History. Segundo was founded by Colorado Fuel and Iron (CF&I) as a company town to house its