the total nitrogen content of three barley cultivars: cehada capa (resistant at 25ac), cl 1243 (resistant at 5°c) and rika 1 (susceptible at all temperatures) to puccinia hordei was determined and compared in healthy and infected plants at 5° and 26°c. the results indicate that the total nitrogen content of cv. cehada capa leaves was greater than that of cl 1243 and rika 1 and that of cl 12...

With increasing concern for the pollution potential of farm wastes, there is a corresponding need for rapid and robust methods of analysis for animal manures. In order to study the rapid testing methods based on the relationship between nutrient concentrations and physicochemical properties, diverse samples (n=105) were used in this study. The results indicated strong linear relations between s...

In the bacterial processes involved in the mitigation of nitrogen pollution, an adequately high carbon-to-nitrogen (C : N) ratio is key to sustain denitrification. We evaluated three natural materials (woodchips, barley grains, and peanut shells) as carbon sources for low C : N wastewater. The amount of organic matter released from these materials to aqueous media was evaluated, as well as thei...

As a preliminary to the consideration of automated, or more correctly mechanized, methods for the determination of total organic nitrogen the discussion of some general aspects of nitrogen determination is illuminating. There are at least four recent reviews, for example those by Bradstreet (1965), Fleck & Munro (I965), Jacobs (1965), and Munro & Fleck (1969), of the determination of nitrogen f...

Moisture play a crucial role in vermicomposting of pressmud (filter cake) (P). Five levels of moisture contents of pressmud (55-57%, 60-62%, 65-67%, 70-72% and 75-77%) at 31±2°C on earthworm activities (growth, reproduction and recovery rate of vermicompost) of Perionyx excavatus (Perrier)-an indigenous species and total microbial population, activity and nitrogen, phosphorous, potassium conten...

meat products, especially fish meat, are very susceptible to lipid oxidation and microbial spoilage. in this study, first, gas chromatography mass spectrometry (gc-ms) analysis of zataria multiflora essential oil (zeo) components was done and then two concentrations of zeo, (1% and 2%) and two concentrations of grape seed extract (gse), (0.5% and 1%) were used in carboxymethyl cellulose coating...

Carbon: the building block of life. You may have heard this phrase, but have you fully considered what it really means? All living things are made of elements, the most abundant of which are, oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorous. Of these, carbon is the best at joining with other elements to form compounds necessary for life, such as sugars, starches, fats, and proteins....