Sentence examples for matter levels and from inspiring English sources

Maintaining soil organic matter levels and appropriate leaching is necessary to avoid the build-up of salts over time.

Removal of crop residue from the field must be balanced against influencing the environment (soil erosion), maintaining soil organic matter levels, and preserving or enhancing productivity ([Wilhelm et al. 2004]).

This study combines a set of chemometric analyses with a source apportionment model for discriminating the weather conditions, local processes and remote contributions having an impact on particulate matter levels and chemical composition.

Reflectance spectroscopy has great potential to monitor and evaluate soils at large scale; however, its effectiveness in predicting properties from tropical soils still needs to be tested since their mineralogy, organic matter levels, and charge and ion adsorption dynamics are different from temperate soils.

As a whole, the results obtained suggested that both kind of sludges contribute to improved soil organic matter levels and humified fractions, although the CSS contribution can be considered as a more efficient organic amendment than the TSS, which may present problems of maturity and degradability.

Generally, Trinervitermes soil had the highest inorganic nutrient and organic matter levels and was most significantly different from the other three soils.

Soil microbial biomass is a sensitive indicator of soil quality and is influenced by many ecological factors such as plant community composition, soil organic matter levels, moisture, and temperature (Jenkinson and Ladd 1981; Patra et al. 1992, 1995; Li and Chen 2004).

Pollution is a major concern in Kolkata., sulphur dioxide and nitrogen dioxide annual concentration were within the national ambient air quality standards of India, but respirable suspended particulate matter levels were high, and on an increasing trend for five consecutive years, causing smog and haze.

Eight Holstein heifers (beginning at 362 ± 7 kg of body weight and 12.3 ± 0.4 mo of age) were fed 8 rations according to a split-plot, 4 × 4 Latin square design with rations containing either high (75% forage dry matter) or low (25% forage dry matter) levels of forage and 4 levels of N intake (0.94, 1.62, 2.30, 2.96 g of N/kg of metabolic body weight per day).

Soils in semi-arid and arid areas are known to have low organic matter levels, a low fertility and a high exposure to degradation, desertification and pollution.

However, shifting this focus to soil quality -- increasing carbon storage and organic matter levels -- could significantly boost both agricultural and environmental outcomes.