A photo essay about the range of plants and animals found in freshwater throughout the year examining the living conditions and survival mechanisms of creatures dwelling at the edge of the water, on its surface, or under the mud.
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Desarrollo Y Aplicacion De Un Indice De Calidad De… This investigation presents the development of a water quality index (WQI) for the rivers in Puerto Rico. This index intent to classify the water quality in a scale from 0 to 100 according to the evaluate constituent and this allow to classify the water according to its state, good, moderate,…
Marihuana Of all the plants men have ever grown, none has been praised and denounced as often as marihuana (Cannabis sativa). Throughout the ages, marihuana has been extolled as one of mans greatest benefactors and cursed as one of his greatest scourges. Marihuana is undoubtedly a herb that has been many…
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Densidad Poblacional De Helicoverpa Zea (boddie)… Helicoverpa zea (Boddie) is the most important insect pest of tomato, Lycopersicum esculentum (Mill.), and corn, Zea mays L. A study was conducted (2003-2004) to estimate the density and phenology of H. zea in commercial fields of tomato (Gargiulo, Santa Isabel) and corn (Mycogen, Santa Isabel, Pioneer, Salinas). The number…
