Sentences with phrase «nitrogen content of»

Zhaozhong Feng, of the Department of Biological and Environmental Sciences at the University of Gothenburg, Sweden, and colleagues looked at the results of eight experiments in four continents on crops, grasslands and forests, and found that as carbon dioxide levels go up, the nitrogen content of the crop is lowered.

If you get 38 % more growth with the same fertilizer the nitrogen content of the plant will be less.

Add a crop like white clover to grass to improve the nitrogen content of the soil and keep a thick, lush lawn.

«Indirectly, this alters the oxygen and nitrogen content of the ocean.

By increasing the nitrogen content of the soil, cyanobacteria provide an important source of natural fertilizer.

She checked the historical records and in 2011 began surveying the Mara River annually, measuring the carbon, phosphorus, and nitrogen content of carcasses; counting the numbers of scavengers; testing water quality; and capturing fish for chemical analyses of the sources of their nutrients.

It breaks down slowly, fertilizing the plants with a generous nitrogen content of a whopping 17 percent compared with the 6 percent nitrogen in commercial turf products.

Researchers led by Carol Pitcairn of the Institute of Terrestrial Ecology in Penicuik, near Edinburgh, have studied the nitrogen content of British sphagnum mosses and heather collected over the past forty years, and correlated these fignres with measurements of the local fallout of nitrogen - containing compounds.

Common heather, Calluna vulgaris, seems to be even harder hit, with air pollution appearing to be the main factor determining the nitrogen content of its tissues.

Not exact matches

Meat industry wastewater may also have a high content of nitrogen (from blood) and phosphorus, in addition to pathogenic and non-pathogenic viruses and bacteria, and parasite eggs (not to mention disinfectants and detergents may enter the wastewater stream during facility - cleaning activities, including acid, alkaline, liquid paraffin and neutral compounds)

Some reports do not report nitrogen content because it is assumed that yearly additions of nitrogen to the garden are necessary.

When doing so they said that they had two different kinds, one from Mexican bats (which had a higher nitrogen content), and the other domestic bat guano, which has a nutrient ratio of 3 -8-1.

But with hundreds of channels you can measure carbon and nitrogen content, and you can tell a lot about plant health, plant disease, or leaf chemistry, all of which affect crop yield.»

While 25 explosives contain high nitrogen content levels, four types of explosives do not.

As shown in previous studies, the litter from the polluted site, which had endured high levels of atmospheric nitrogen oxides and ozone, had higher nitrogen content than litter from the clean site.

Overall, the average nitrogen content in the shells and soft tissue was comparable to that found in previous studies ranging from Cape Cod to the Gulf of Mexico.

The highest nitrogen content, around 2.6 per cent of dry weight, occurs in heather in eastern England, where the average annual fallout of nitrogen is 30 - 40 kilograms per hectare, six times greater than in the relatively unpolluted northwest of Scotland (Environmental Pollution, vol 88, p 193).

The paper «Seasonal ITCZ migration dynamically controls the location of the (sub) tropical Atlantic biogeochemical divide» highlights how dust blowing off Africa's deserts amplify surface levels of iron in the Atlantic that in turn control the spatial activity of nitrogen gas fixing phytoplankton and phosphate content in the Tropical Atlantic.

First, the researchers observed that the visited trees had a higher content of nitrogen than the trees to which the ants did not have access.

To evaluate any wetland's efficacy in cleaning polluted water, extensive monitoring equipment must quantify the water flow, its incoming and outgoing nitrate content, and the amount of nitrogen stripping occurring.

The team found that the degree of nitrogen pollution, which is worsening in urban areas, can be evaluated by analyzing the nitrogen content and the stable isotope ratio in bryophytes.

«With the first method, we measured the nitrogen content and by measuring the relationship between the two isotopes of nitrogen, N15 and N14, we could reconstruct the thickness of the compressed snow 19,000 years back in time,» explains Vasileios Gkinis.

This material has been tested as a fertilizer and has proven to stimulate the growth of several plant species, both forestry and herbaceous, increasing up to the 10 % its total content of nitrogen and carbon as well as an increase of its roots.

Reduced nitrogen content in atmospheres with raised carbon dioxide has previously been attributed to a kind of dilutive effect, in which nitrogen absorption fails to keep pace with the increase in plants» photosynthesis and growth.

They measured the nitrogen - 15 content of plant remains from cereals such as wheat and barley and pulses such as peas and lentils from 13 early farming sites.

The team tested a wide variety of sources of biomass — leaves, stems, flowers, seeds, and legumes — with particular interest in those with high protein content because the amino acids that make up proteins are a rich source of nitrogen.

Buckler is credited with improving association mapping, one of the methods used for this research, that is being used to understand the genetic basis of such complex traits as vitamin A content, drought tolerance, nitrogen use, carbon metabolism, disease resistance, and crop and milk yields.

The embryos produce nitrogen - rich waste that is useful to algae, and the algae increases the oxygen content of the fluid around the respiring embryos.

On the other hand, at high (and very low) BPEI content, the nitrogen atoms are located primarily at the edge sites of the aromatic domains.

Possible mechanisms include (iv) fertilization of phytoplankton growth in the Southern Ocean by increased deposition of iron - containing dust from the atmosphere after being carried by winds from colder, drier continental areas, and a subsequent redistribution of limiting nutrients; (v) an increase in the whole ocean nutrient content (e.g., through input of material exposed on shelves or nitrogen fixation); and (vi) an increase in the ratio between carbon and other nutrients assimilated in organic material, resulting in a higher carbon export per unit of limiting nutrient exported.

At the same time it increases the content of Thiol in the skeletal muscle neutralising various nitrogen - based radicals.

The significantly higher protein content was modestly offset by slightly more calories in the control phase, which reduces the amount of protein required to maintain nitrogen balance.

At the low end of the amino acid spectrum, you'll find whey and soy protein powder — and only 17 % of their content is utilized by the body, with 83 % leaving your body as nitrogen - based waste.

One measured fluid, electrolyte, and renal indices of hydration over eleven days of caffeine consumption in human subjects, finding that doses of up to 6 mg caffeine per kilogram of body weight had no effect on body mass, urine osmolality (urine concentration), urine specific gravity (concentration of excreted materials in urine), urine color, urine volume, sodium excretion, potassium secretion, creatinine content, blood urea nitrogen (forms when protein breaks down), and serum levels of sodium and potassium.

In general, when energy intake is sufficient to meet energy demand, increasing the protein content of the diet imparts no added influence on nitrogen retention (12).

These include CO2 concentrations (which generally mediate a positive influence), temperature increases (beneficial to some crops in some regions and harmful elsewhere), increases in droughts, flash floods, weeds, and insect infestations (all harmful), as well as drains on the availability of soil nitrogen needed for the protein content of food crops.

The nutritive value of plants doesn't come from their carbon content, it comes from their nitrogen content.

Elevated atmospheric CO2 is associated with decreased plant nitrogen concentration, and therefore decreased protein, in many crops, such as barley, sorghum, and soy.210, 211,212,213 The nutrient content of crops is also projected to decline if soil nitrogen levels are suboptimal, with reduced levels of nutrients such as calcium, iron, zinc, vitamins, and sugars, although this effect is alleviated if sufficient nitrogen is supplied.214 Fourth, farmers are expected to need to use more herbicides and pesticides because of increased growth of pests215, 216,217,218 and weeds219, 220 as well as decreased effectiveness221 and duration222of some of these chemicals (Ch.

Clay content and initial organic matter content are the main factors in the determination of new equilibrium levels of carbon and nitrogen in the soil.

Scientific confidence of the occurrence of climate change include, for example, that over at least the last 50 years there have been increases in the atmospheric concentration of CO2; increased nitrogen and soot (black carbon) deposition; changes in the surface heat and moisture fluxes over land; increases in lower tropospheric and upper ocean temperatures and ocean heat content; the elevation of sea level; and a large decrease in summer Arctic sea ice coverage and a modest increase in Antarctic sea ice coverage.