Loams

Some tests indicate that magnesium alloys are resistant to loam sod. However, in the presence of chlorides, corrosive attack may be serious particularly if galvanic couples are present as a result of coupling to iron stmctures. 

Fig. 6. Sorption and desorption of ima2ethapyr on (a) Sassfras sandy loam and (b) Webster clay loam (45) Q — sorption isotherm,...

It appears that pesticides with solubiHties greater than 10 mg/L are mainly transported in the aqueous phase (48) as a result of the interaction of solution/sediment ratio in the mnoff and the pesticide sorption coefficient. For instance, on a silt loam soil with a steep slope (>12%), >80% of atra2ine transport occurs in the aqueous phase (49). In contrast, it has been found that total metolachlor losses in mnoff from plots with medium ground slopes (2—9%) were <1% of appHed chemical (50). Of the metolachlor in the mnoff, sediment carried 20 to 46% of the total transported pesticide over the monitoring period. 

The fact that is not radioactive means that it can be used safely in experiments in the field, but it also means that much patient work is needed to obtain results. The approach is demanding in terms of time, equipment, and skilled manpower, but it has made a great contribution to the understanding of the nitrate problem. The results that are outlined here are from experiments made by staff at Rothamsted, but key contributions have also come from Scotland and France. " The majority of the Rothamsted experiments involved winter wheat, but oilseed rape, potatoes, beans, and sugar beet were also grown. The soil is a factor in nitrate leaching, and three types were used, the flinty, silty clay loam at Rothamsted, a sandy loam at Woburn in Bedfordshire and a heavy sandy clay at Saxmimdham in Suffolk. 

Figure 8 The effect of fertilizer application and rainfall and the emissions of NO and N,0 from clay loam soils cropped with ryegrass cut for silage in South Scotland.

Loam fractionation Eractionation, see Distillation Metal separation... 

Letten, m. potter s clay, loam, -nudel,/. (Expl.) clay roll (for tamping), -schlamin, m. clay slurry, slip. 

Loam, sandy loam (loam content 75% or less) marly loam, sandy claysoil (silt content 75% or less) 0... 

In this case loam can be re-entered into the mixture by this action, and solids or liquids added will enter the impeller rather rapidly. The deeper the liquid above the baffle the greater the rotating action. Bottom swirling action allows the segregation of heavy solid particles [21]. 

Norfolk sandy loam Lakeland sandy loam Hagerstown silty clay loam Barnes clay loam Celeryville muck... 

Figure 1. Persistence of TCDD in Lakeland sandy loam applied at I, JO, 106 ppm and sampled after 20, 40, 80, 160, and 350 days...

Figure 3. Uptake of C-TCDD from Lakeland sandy loam hy soybeans...

TABLE IV. Nitrosation of Atrazine in Matapeake Loam Soil with Sodium Nitrite ... 

Basalt, granite, manganese nodules, shale, flint clay, iron formation materials, phosphate rock, fertilizers Calcareous loam soil, loess, polluted farmland soil, sand soil... 

Fig. 4.4 Calibration curve for chromium, constructed from measurements of increasing intakes of five different CRMs NIST SRMs 1646 Estuarine sediment, certified content 76 + 3 mg/kg 1632a Coal, certified content 34.4 1.5 mg/kg BCR CRMs 141 Calcareous loam soil, indicative content 75 mg/kg, 142 Light sandy soil, indicative content 74.9 mg/kg and 143 Over fertilized soil, indicative content 228 mg/kg (Kurfiirst 1998b).

B. Jensen, Rhizodeposition by C pulse labelled spring barley grown in small field plots on sandy loam. Soil Biology ami Biochemistry 25 1553 (1993). 

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