Search
Now showing items 1-10 of 19
Caracterización de los nutrientes y sedimentos en la escorrentía de suelos enmendados con residuos orgánicos de vaquería
(2009)
Runoff with elevated phosphorus (P) and nitrogen (N) concentrations from agricultural soils contributes to surface water quality reduction. The effects of soil test P, dairy manure sludge application levels, and time after ...
Nitrogen retention and movement in a variable charge
(2005)
A study was conducted to evaluate the effect of lime application and frequency
of N fertigation on NH4
+
and NO3
-
concentrations on Coto clay. Two field experiments
were established at Isabela, PR, one in March, ...
Zonificación agroecológica del café en Puerto Rico y análisis estructural y de composición de especies arbóreas presentes en el agroecosistema cafetero
(2007)
By combining zoning and agro-ecological management of coffee production, it is possible to reduce the impacts of agricultural practices on the environment. The objectives of this work were to identify agro-ecological zones ...
Soil organic carbon and nitrogen distribution in a tropical watershed
(2004)
The role of soils in sequestering atmospheric carbon (C) and nitrogen (N) can best
be understood from a watershed perspective because the multiple influences of factors
influencing the process can be assessed simultaneously, ...
Validación del índice de fósforo del Caribe y evaluación de prácticas de manejo de desechos orgánicos en fincas de producción animal de Puerto Rico
(2005)
Nutrient losses from agricultural soils are one of the principal causes of surface water quality impairment. A study was conducted in animal operations (dairy cattle and poultry) of Puerto Rico, to quantify nitrogen (TKN), ...
Post-fire regeneration in subtropical dry forest of Puerto Rico
(2009)
Dry forests were widespread in the tropics before being cleared for agricultural and urban use, but they are now considered to be one of the most endangered ecosystem types. Cleared and degraded tropical dry forests commonly ...
Relación entre propiedades del suelo y el efecto de coberturas vegetales, en aguacate (Persea americana Mill.)
(2009)
In 2007, Puerto Rico imported 64 percent of the avocado consumed, which could suggest the economic potential of increasing its production, although this must take into consideration several factors, among others, production ...
Transporte de sedimentos y fósforo en escorrentía bajo simulación de lluvia
(2005)
Phosphorus (P) in runoff from agricultural soils is an important contributor to surface water eutrophication. To quantify P losses from organic (poultry litter [PL]) and inorganic (triple superphosphate [TSP]) P amended ...
Respuesta del plátano (Musa accuminata x Musa balbisiana) a la aplicación de nitrógeno en un Vertisol de Puerto Rico
(2009)
Plantains (Musa accuminata x Musa balbisiana) are one of the most important commercial crops cultivated in Puerto Rico. It is important to determine the optimum fertilizer nitrogen (N) rates for the optimum yields, decrease ...
Utilización de urea líquida (ULB-35®) en producción de forrajes en Puerto Rico.
(2009)
Four experiments were conducted on commercial farms, to quantify forage yields and nutritional contents of pastures used for hay with the application of liquid urea (ULB-35®). Liquid material was applied through the center ...