The California Leafy Greens Marketing Agreement (LGMA) was adopted in an effort to minimize the risk of contamination of leafy greens with enteric pathogens from a variety of sources, including ground and surface irrigation waters. The LGMA contains standards similar to those established for recreational waters, based on Escherichia coli concentrations. However, no correlation between E. coli a...

The soil C, N, P and K content of agricultural soil were measured over the last 4 decades in NE Catalonia (NE Spain). Plant-available P and K increased by ca 109 and 105% respectively and total N decreased by 30%. The increases in plant-available P content are in accordance with the increasingly used pig slurry being very rich in P, and with P tendency to be retained in soils, since it is less ...

Concentrated CaCl2 and CaBr2 salt solutions of densities up to 2.3 kg L-1 are regularly used to control hydrostatic pressure in oil wells during special operations in the exploration and production of natural gas and crude oil. Various concentrations of high density salts are frequently left in mud pits near the drilling site as waste, polluting fresh and ground waters by spillage and drainage....

The mean annual effective dose from natural radionuclides for users of drilled wells was estimated to be 0.41 mSv, for users of wells dug in the ground 0.05 mSv and for people using water from waterworks 0.02 mSv. The highest effective dose from drinking water was caused by 222Rn (Fig. 2) constituting 75% and 60% of the total effective dose caused by all natural radionuclides for drilled-well u...

in recent years, a potential connection between human intake of aluminum and alzheimer’s disease has drawn attention to the aluminum concentration in drinking water. it is therefore of interest to investigate the aluminum concentration m drinking water, produced under different circumstances. a random selection of 152 water samples were taken by the supply source including ground, surface and a...

Mobilization of pesticides into surface waters of flooded agricultural landscapes following extreme precipitation events has not been previously investigated. After receiving 96 mm of rain in the previous 45 d, the Vanguard area of southeastern Saskatchewan, Canada, was subjected to a torrential storm on July 3, 2000, that produced as much as 375 mm of rain in 8 h. The majority of herbicides, b...

abnormal fluoride levels in drinking water have been associated with adverse health effects. to determine the fluoride content of well waters in enugu, southeastern nigeria, water samples from 50 artisan wells chosen by multistage sampling procedure from the 5 zones of enugu municipality were analyzed in duplicates for their fluoride content. the zonal mean values were 0.60, 0.70, 0.62, 0.62, a...

Purpose: to characterize the main sources of irrigation water in steppe zone Crimea and assess prospects for their further use. Materials methods. Statistical information on resources use irrigated agriculture results monitoring observations over resource composition part peninsula are considered. To feasibility using limitedly suitable waters agriculture, phytotesting radish corn seeds con-duc...