Soil microorganisms colonizing soil water sampling devices (lysimeters) reduced concentrations of biodegradable organic chemicals, including 2,4-dichlorophenoxyacetic acid methyl ester, alachlor, methyl m-chlorobenzoate, and metolachlor as water entered through porous ceramic cups. In some cases, losses exceeded 99%. Additions of either a biocide (sodium hypochlorite) or a bacteriostat (copper ...

Reduction of migration of fecal coliforms (FC) and streptococci (FS) by limiting the leaching in effluent-irrigated soil was tested in lysimeters packed with quartz sand without or with added biosolids compost or with one of two clayey soils. The 200-L, 70-cm-deep lysimeters were either planted with a Eucalyptus camaldulensis or an Oroblanco citrus tree (in the sand only), or not planted. The E...

this study was undertaken to investigate the feasibility of treating industrial wastewater using soil and plant system. nine cylindrical plastic-lysimeters (60 cm diameter and 100 cm height) equipped with a drain pipe at the bottom were filled by granular sandy-loam soil. sunflower, oat and fescue were planted each in three lysimeters, in order to investigate the effectiveness of plants in lead...

The increasing demands for environmental protection and sustainable food production require an increase in the use of natural and non-toxic materials for agriculture. In this study, the feasibility of using surfactant-modified zeolite (SMZ) in comparison with zeolite clinoptilolite (Cp) application to reduce nitrate leaching and enhance crop growth was investigated. The effects of size (millime...

This may cause an unrealistic soil moisture regime and may effect crop growth. A method was developed to obtain large undisturbed soil cores To more closely represent an uninterrupted soil coland instrument those cores to collect vadose zone leachate data under agricultural field conditions. Twenty undisturbed soil core lysimeters umn at the point of leachate collection, a vacuum extracwere con...

Evapotranspiration (E,) was estimated for plant, first ratoon and second ratoon crops in a sugarcane field by means of the water balance in a large plastic-lined lysimeter (405 m2) and three small weighed lysimeters (each 3,71 m2). For the first 230 days of the plant crop of the experiment the mean daily estimates of E , from the large and small lysimeters were 4,14 mm and 4,16 mm respectively....

The main physical and chemical controls on nitrogen (N) fluxes between the root zone and the water table were determined for agricultural sites in California, Indiana, Maryland, Nebraska, and Washington from 2004 to 2005. Sites included irrigated and nonirrigated fields; soil textures ranging from clay to sand; crops including corn, soybeans, almonds, and pasture; and unsaturated zone thickness...

A study was undertaken on drained and undrained 1 ha grassland lysimeters to assess the effectiveness of multiple novel tracing techniques in understanding how agricultural slurry waste moves from land to water. Artificial fluorescent particles designed to mimic the size and density of organic slurry particles were found to move off the grassland via inter-flow (surface + lateral through-flow) ...

Data for water vapor adsorption and evaporation are presented for a bare soil (sandy loam, clay content 15%) in a southern Spanish olive grove. Water losses and gains were measured using eight high-precision minilysimeters, placed around an olive tree, which had been irrigated until the soil reached field capacity (!0.22 m m). They were subsequently left to dry for 10 days. A pair of lysimeters...