Accumulation, rotational crops

OPPTS 860.1560 Reasonable Grounds in Support of the Petition OPPTS 860.1650 Submittal of Analytical Reference Standards OPPTS 860.1850 Confined Accumulation in Rotational Crops OPPTS 860.1900 Field Accumulation in Rotational Crops. 

Photolysis in Water Photolysis on Soil Anaerobic Soil Metabolism Field Dissipation Rotational Crop Fish Accumulation... 

The uptake of heavy metals from soils is also determined by their contents in soil and by plant species. If these crops are used for anaerobic digestion one has to consider that there is a remarkable risk of an accumulation of heavy metals in soil. In the case of combustion, most heavy metals can be removed by filtering the ash and it can be used safely as fertiliser. Thus cultivation and combustion of short rotation coppice is a smart scheme of removing heavy metals from contaminated soils. 

In the first year, under conditions of low precipitation and low hydrological flow, N accumulation was substantial, about 134 kg/ha/year. Accumulated N decreased up to 97 kg/ha/year with greater runoff outflow during the second year, while in the third year, high water flow leached 50 kg/ha/year, but the agroecosystem still accumulated nitrogen due to a leguminous species in crop rotation. 

C oH 5, Mr 136.24, crystalline, bicyclic monoterpene with isocamphane structure occurring in nature in two optically active forms and a racemate (l/f,45)(+)- and (15,4/f)(-)-C., mp. 50-51 °C, [a]j, 119° (benzene) ( )-C., mp. 47 °C. Optically active C. racemizes readily. thus various values for optical rotation are found in the literature. C. occurs in many essential oils, e.g., Ceylon, citronella, turpentine, and bergamot oil. Use In the perfume industry and for production of camphechlor (toxaphen), a chlorinated C. that was used as an insecticide. Since it accumulates in the body fat of mammals its use as crop protection agent is no longer permitted in Germany. 

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