Ants are known to contribute the physical and chemical improvement of soil. In this context, hypothesis put forward is that ants improve nitrogen (N) supplementation necessary ensure high primary production measured in Lamto savannah. Recent investigations humid savannah ecosystem showed ant nests’ association with perennial grasses enhances their growth, productivity, microorganism activity. T...

Cover crops can be effective in minimizing nutrient losses from agricultural fields. The objective of this study was to determine the impact cover crop (rye, Secale cereale L.) and winter manure application on loss simulated rainfall runoff. A split block design with (as vertical block) horizontal established 2009. Two rain simulations (the first defined as “dry” second “wet”) using sixteen 4 m...

In the present study, leachate toxicity of a municipal solid waste landfill located in the Sinos River Valley region (southern Brazil) was evaluated using plant bioassays. Leachate toxicity was assessed by analysis of seed germination and root elongation of lettuce (Lactuca sativa L.) and rocket plant Eruca sativa Mill.) and root elongation of onions Allium cepa L.). Bioassays were performed by...

Nitrogen (N) pollution is a growing concern in forests of the greater Sierra Nevada, which lie downwind of the highly populated and agricultural Central Valley. Nitrogen content of Letharia vulpina tissue was analyzed from 38 sites using total Kjeldahl analysis to provide a preliminary assessment of N deposition patterns. Collections were co-located with plots where epiphytic macrolichen commun...

Nutrient loading in drainage outflow is estimated from measured flows and nutrient concentrations in the drainage water. The loading function is ideally continuous, representing the product of continuously measured outflows and nutrient concentrations in drainage water. However, loading is often estimated as the product of continuously measured outflow and nutrient concentrations measured at le...

Nitrogen fixation in waterlogged, soil-straw, and sandday-straw mixtures was measured with the C2H2reduction assay, the I5N-tracer technique, and the Kjeldahl method. The reduction of 6 to 15 moles C2H2 corresponded to the fixation of 1 mole N2. The theoretical ratio is 3 moles C2H2 to 1 mole N2. A ratio of 3 moles C2H2 reduced for each mole of N2 fixed was obtained when samples of sandxlay-str...

Variations in the flow and pollutants concentrations during the day were monitored at the Main Outfall disposal station of the city of Lahore. The laboratory analysis of the wastewater samples collected at 2 hour interval on 5 th and 6 th May, 2009 for pH, temperature, alkalinity, hardness, Biochemical Oxygen Demand (BOD5), BOD5Filtered, Total Kjeldahl Nitrogen (TKN), Ammonia Nitrogen (NH3-N), ...