Albizia saman and Leucaena leucocephala are not native to Bangladesh, but they widely planted in agroforestry households for their commercial value. Selection of tree species with efficient return nutrients is a vital challenge maintain soil fertility sustainable crop production. Therefore, comparative study was conducted on (N, P K) leaching from leaf litter A. L. laboratory condition. The ini...

Miller, J.H. and Newton, M., 1983. Nutrient loss from disturbed forest watersheds in Oregon’s Coast Range. Agro-Ecosystems, 8: 153-167. Dissolved nutrients were monitored bi-weekly in stream water draining 14 upland watetzhcds in Oregon’s Coast Range after sprayin g with 2,4:5-T + 2,4-D, clrarcut harvesting and slash burning. Anion generation and leaching were primarily studied. The nitrate con...

The effects of organic and mineral nitrogen fertilization on nitrogen leaching and nitrate concentration in percolated water were simulated using the CANDY model. In a long-term IOSDV field experiment carried out from 1983 to the present in Lukavec, Czech Republic, increasing nitrogen rates from 0 kg to 200 kg N*ha in mineral fertilizers were combined with the application of farmyard manure or ...

Abstract Background Leaching from agricultural land is one of the major pathways phosphorus (P) loss soils to waterbody and may induce adverse effect on territorial environment. Past studies usually focused inorganic P (P I ) while ignored role organic O in leaching process. A total 63 soil samples were collected across China with various types including 21 paddy soils, 13 chernozems, 11 red ot...

20 MARIE TRYDEMAN KNUDSEN, IB SILLEBAK KRISTENSEN, JØRGEN BERNTSEN, BJØRN MOLT PETERSEN & ERIK STEEN KRISTENSEN Adresses: Danish Research Centre for Organic Farming (DARCOF), P.O. Box 50, DK-8830 Tjele, Denmark Research Centre Foulum, Department of Agroecology, P.O. Box 50, DK-8830 Tjele, Denmark Short title: N leaching losses for organic and conventional farming

We used a special-purpose glass microfiber sample, Johns-Manville Code 100/475, to study the effects of various acid and alkali treatments on biological activity as assessed by inflammation in the mouse peritoneal cavity, the leaching of Si, and the phase contrast optical microscopy (PCOM) fiber number. We used mild and medium treatments with oxalic acid and Tris buffer and harsh treatment with...

Planned implementation of a nitrogen (N) “cap” on land in the Lake Taupo catchment has led to the need for a range of N mitigation options for pastoral farmers to increase profitability while farming within the N cap. A multi-disciplinary research programme has focused on the potential of targeting different parts of the N cycle to increase N efficiency and reduce N leaching losses. A range of ...

A field experiment was performed from 2003 to 2008 to evaluate the effects of tillage system and nitrogen management regimes on crop yields and nitrate leaching from the fluvo-aquic soil with a winter wheat (Triticum aestivum L.)-maize (Zea mays L.) double-cropping system. The tillage systems consisted of conventional tillage (CT) and no-tillage (NT). Three nitrogen management regimes were incl...

Golf course putting greens typically receive high pesticide applications to meet high quality demands. Research on pesticide fate in turf ecosystems is important to better understand the potential impact of pesticide use on the environment and human health. This research was conducted to evaluate the environmental fate of two commonly used insecticides--trichlorfon (dimethyl 2,2,2-trichloro-1-h...

Long-term assessment of NO3-N leaching losses to subsurface drainage "tile" water from different tillage systems and N application rates can help mitigate the environmental concerns of production agriculture. A three-phase field study was conducted to investigate the impact of two tillage systems (chisel vs. no-till) and different N application management systems on flow-weighted NO3-N concentr...