To enable an accurate estimate of total excess nitrogen (N) in the North Atlantic, a new tracer TNxs is defined, which includes the contribution of organic nutrients to the assessment of N:P stoichiometric anomalies. We measured the spatial distribution of TNxs within the subtropical North Atlantic using data from a trans-Atlantic section across 24.5 N occupied in 2004. We then employ three dif...

in order to study the effects of simultaneous application of znso4 and biological fertilizer, azotobacter chroococcum and azospirillum brasilense, on grain yield and nitrogen uptake efficiency in rapeseed (brassica napus l.), cv. hyola308, a field experiment was conducted as split plot factorial based on randomized complete block design at research field of faculty of agricultural sciences, uni...

Heavy metals may influence chemical composition of plants, and thus shape elemental stoichiometry of plant communities. That is because some physiological processes aiming at neutralization of contaminant toxicity require increased acquisition of some nutrients (e.g. N, S, P or Ca). The aim of the study was to evaluate the heavy metal deposition in Poland using moss Pleurozium schreberi as a bi...

The macular carotenoids (i.e., lutein (L), zeaxanthin (Z) and meso-zeaxanthin (MZ)) exhibit anti-inflammatory, antioxidant and optical properties that are believed to support human health and function. Studying the accumulation and distribution of these nutrients in tissues and organs, in addition to the eye, is an important step in understanding how these nutrients might support global human f...

Predictions of how salt marsh primary production and carbon storage will respond to environmental change can be improved through detailed datasets documenting responses to real-world environmental variation. To address a shortage of detailed studies of natural variation, we examined drivers of Spartina alterniflora stem allometry and productivity in seven marshes across three regions in souther...

Abstract Eutrophication is a common problem for the dams situated within an urban or agricultural catchment with high source of untreated plant nutrients. This can negatively affect hydro ecosystem, recreational and other uses water. On hand, such eutrophic could also be rich nutrients use. Thinking irrigation as alternative means reservoir water management, suitability was investigated Roodepl...

iNTroducTioN The discharge of reactive nitrogen (N) and phosphorus (P) into water bodies is unwanted as it accelerates the process of eutrophication. To avoid discharge of these nutrients, energy and resources in the form of aeration (for nitrification), organic carbon (for denitrification and/or enhanced biological phosphorus removal (EBPR)), and chemical precipitants (e.g., ferric, alum, lime...

Mineral nutrients are important for the growth and development of plants and microorganisms, and are important factors in plant–disease interactions. How each nutrient affects a plant’s response to disease is unique to each plant–disease complex, and in general, nutrient–pathogen interactions are not well understood. Plant nutrients may affect disease susceptibility through plant metabolic chan...

In low-input land-use systems combining timber trees with shade-tolerant understorey crops, it is essential to establish the effects of tree density upon weeds and the contribution of weeds to competition and nutrient cycling. Adjusting tree density may alter weed competition for light, water and nutrients, the storage of nutrients by weeds through growth and the release of nutrients via decomp...