Abstract Background Eutrophication of freshwater ecosystems resulting from nitrogen and phosphorus pollution is a major environmental stressor across the globe. In this systematic review, we compiled synthesized literature on sestonic benthic chlorophyll (chl-a) responses to total (TN) (TP) concentrations in water column streams rivers provide state-of-the-science summary nutrient impacts these...

Traits related to nitrogen fixation may be used as indirect selection criteria foraflatoxin resistance in peanut. The aim of this study was to investigate therelationship between N2 fixation traits and aflatoxin contamination in peanut underdifferent drought conditions. Eleven peanut genotypes were evaluated under threewater regimes for two seasons in the field. Data were observed on kernel inf...

The ongoing rise in atmospheric pCO2 and consequent increase in ocean acidification have direct effects on marine calcifying phytoplankton, which potentially alters carbon export. To date it remains unclear, firstly, how nutrient regime, in particular by coccolithophores preferred phosphate limitation, interacts with pCO2 on particulate carbon accumulation; secondly, how direct physiological re...

A study was conducted to compare the composition of equine manure as removed from stall, and bedding-free on six horse farms. The farms ranged a pleasure stable with poorly managed stalls an intensively for racehorses. characteristics measured included: moisture content, total nitrogen, ammoniacal nitrate organic phosphorous (expressed P2O5), potassium K2O), calcium, magnesium, sulfur, zinc, co...

a split plot factorial experiment based on randomized block design in four replications was performed in order to study the effect of three levels of compost (zero, 10 and 20 ton dry matter/ha), in main plots and three levels of nitrogen (zero, 100 and 200 kg/ha pure nitrogen) and three levels of phosphorous (zero, 60 and 120 kg/ha p2o) on corn yield. the effect of compost on different characte...

poinsettia (euphorbia pulcherrima) is a potted plant, which its colorful bracts appear in short days. in thisexperiment, effect of different ammonium to total nitrogen ratios on quantitative and qualitative traits ofpoinsettia was studied. the experiment was conducted as a complete randomized design with threereplicates. the plants were irrigated with water containing of different ammonium to t...