Loam soil

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. 

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.

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). 

Maize does best on fertile loam soils in the south-east of England. It is susceptible to frost damage and so needs to be planted late in the year, about mid-May. Its popularity is mainly because it is very high yielding and will make excellent high energy silage. Maize can make a useful break between cereals because it is not susceptible to the same diseases and pests. 

Soybean dry matter production. One week after planting in the pipes, two-hundred-forty 0.7 liter styrofoam cups with four holes in the lower sides of each were filled with a 2 cm layer of pea gravel, then filled to within 1 cm of the top with a 1/1/1 v/v/v mix of perlite, coarse sand and a sandy loam soil. Each cup was planted with three soybean seed ( Centennial or Coker 136 ) previously coated with Nitragin. The seed were covered with 1 cm of soil mix and watered with tap water. 

Soil. Approximately 5 pounds of air-dried Hanford fine sandy loam soil were selected from a lima bean field in an area where all plants had been killed by wire worms. The pH of a water slurry of this soil was 7.70. It was screened through a 20-mesh sieve, blended, and stored in a closed can. 

Figure 3. Heats of adsorption for Butylate, Alachlor, and Metolachlor in sandy loam soil.

Rogers CW, Brye KR, Norman RJ, Gbur EE, Mattice JD, Parkin TB, Roberts TL. Methane emissions from drill-seeded, delayed-flood rice production on a silt-loam soil in Arkansas. J. Environ. Qual. 2013 42 1059-1069. 

Smartt AD, Rogers CW, Brye KR, Norman RJ, Smartt WJ, Hardke JT, Frizzell DL, Casteneda-Gonzalez E. Growing-season methane fluxes and emissions from a silt-loam soil as influenced by rice cultivar. In Norman RJ, Moldenhauer KAK, editors. B.R. Wells Rice Research Studies, 2014. Fayetteville Arkansas Agric. Expt. Stn. Res. Ser. 62 2015. pp. 289-297. 

Nwosu JU, Harding AK, Linder G. 1995. Cadmium and lead uptake by edible crops grown in a silt loam soil. Bull Environ Contam Toxicol 54 570-578. 

The kinetics of transformation of Mn and Fe among soil fractions is related to the redox potential (Eh changes) as well as the content of reductants or oxidants in the soil. Generally, a drop in Eh is observed within a few days of the waterlogging of a soil. In a coastal saline silty-clay soil, Eh was reduced to 210 mV after four days of submergence (Bandyopadhyay and Bandyopadhyay, 1984). The decrease in Eh mobilized Mn, and the maximal soluble Mn concentration was found after 14 days of submergence in a sandy-loam soil (Sadana and Takkar, 1988). 

Figure 8.1. The accumulation of trace elements in two Californian soils. The soils received four-year sludge applications at the rate of 0, 22.5, 45, and 90 tons ha-1 year 1. Domino loam soil, fine-loamy, mixed, thermic Xerollic Calciorthid Greenfield sandy loam soil, coarse-loamy, mixed, thermic Typic Haploxeralf (Data extracted from Sposito et al., 1982)...

Monkiedje et al. [10] investigated the fate of niclosamide in aquatic system both under laboratory and field conditions. The octanol/watcr partition coefficient (Kaw) of niclosamide was 5.880 x 10 4. Adsorption isotherm studies indicated that the Freundlich parameters (K, n) for niclosamide were 0.02 and 4.93, respectively, for powder activated carbon (PAC), and 9.85 x 10 5 and 2.81, respectively, for silt loam soil. The adsorption coefficient (Aoc) for the drug was 0.02 for PAC, and 4.34 x 10-3 for the same soil. Hydrolysis of niclosamide occurred in distilled water buffer at pH above 7. No photolysis of the drug was observed in water after exposure to long-wave UV light for 4 h. Similarly, neither chemically volatilized from water following 5 h of sample aeration. Under field conditions, niclosamide persisted in ponds for over 14 days. The half-life of niclosamide was 3.40 days. 

Chander K, Brookes PC (1993) Residual effects of zinc, copper and nickel in sewage sludge on microbial biomass in a sandy loam. Soil Biol Biochem 25 1231-1239... 

Woodburn silt loam soil, 1.9% organic matter, equilibrium isotherm-GC, Chiou et al. 1983)... 

---