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Nitrogen and phosphorus in the subtropical Presidio River, northwestern Mexico
(Pontificia Universidad Católica de Valparaíso, 2017)
Effects of Sulfur, Phosphorus, and Nitrogen Application on the Growth and Yield of Sweet Potatoes Grown on Fredensborg Clay LoamTítulo en español
(University of Puerto Rico Mayagüez Campus Agricultural Experiment Station, 1983)
Modified procedure for the simultaneous determination of nitrogen, phosphorus and sulphur by hydrogen peroxide microwave digestion and ion chromatography
(Facultad Experimental de Ciencias de la Universidad del Zulia, 2011)
Efecto de las Bajas Concentraciones de Nitratos y Fosfatos sobre la Acumulación de Astaxantina en Haematococcus pluvialis UTEX 2505
(Centro de Informacion Tecnologica, 2019-01-01)
In this study, the effect of the concentration of nitrogen and phosphorus on the accumulation of Astaxanthin in Haematococcus pluvialis UTEX 2505 was evaluated using a factorial 3 2 design. The dependent variables were ...
Phosphorus and Nitrogen Fertilization Effect on Phosphorus Uptake and Phosphatase Activity in Ryegrass and Tall Fescue Grown in a Chilean Andisol
(LIPPINCOTT WILLIAMS & WILKINS, 2011)
Physiological performances of two populations of Compsopogon caeruleus (Rhodophyta) to inorganic nitrogen and phosphorus impoverishment
(2014)
Studies on the effects of inorganic nutrients manipulation (specially nitrogen and phosphorus) in freshwater macroalgae are scarce. Physiological responses (growth, photosynthesis, and pigment contents) to nitrogen and ...
Variations in Growth and Toxicity in Gymnodinium Catenatum Graham from the Gulf of California Under Different Ratios of Nitrogen and Phosphorus
(Ciencias Marinas, 2012-01-01)
A strain of Gymnodinium catenatum Graham (GCCV-7), isolated from the Gulf of California, was submitted to conditions with different nitrogen-to-phosphorus ratios (5.4, 9.2, 23.5, 44.7, and 74.3) to determine the effect of ...
Factors that control the spatial and temporal distributions of phosphorus, nitrogen, and carbon in the sediments of a tropical reservoir
(2018-01-01)
The impacts of anthropic activities have had profound effects on the nitrogen (N) and phosphorus (P) cycles in many aquatic ecosystems. We investigated the spatial and temporal distributions of carbon (C), N, and P in the ...
Concentration and temporal variability of nitrogen, phosphorus and zinc in pecan leaves
(International Society for Horticultural Science, 2015)
Information about the local response to fertilization in pecan trees is very
limited. Here, we investigated the effects of fertilization with different levels of
nitrogen (N), phosphorus (P) and zinc (Zn) on the chemical ...
The role of heterocytes in the physiology and ecology of bloom-forming harmful cyanobacteria
(Elsevier Science, 2016-12)
Dolichospermum flos-aquae and Cylindrospermopsis raciborskii are two cyanobacteria species which cause harmful blooms around the world. Both these species share the capacity to fix atmospheric nitrogen in heterocytes (cell ...