| 词汇 | example_english_leach |
| 释义 | Examples of leachThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. The lower unit is characterised by an average porosity of about 13% which is largely derived from vugs produced by leaching of replacement anhydrite. The data may suggest that growing lowland rice during the wet season could reduce the amount of nitrate leached to the shallow aquifer. Under such conditions, nitrate can be leached and can contaminate the shallow aquifer which is also a source of drinking water. In fields with low erosion rates, there is little increase in leaching. As the topsoil was removed, leaching increased by 40 per cent, on average, over the 30-year time horizon. The lowest maize yield harvested in 1996/97 under sole maize was attributed to leaching and water logging due to excessive rainfall and lodging. The leaching fraction of 0.2-0.3 was provided for all treatments during the course of the experiment. The soil was then leached with 95 % ethanol to remove free salts, air-dried and passed through a 2-mm sieve. Data were summarized as mean cumulative cation losses from leaching columns of each treatment after each leaching event. The nitrates can be washed, or leached, out of the soil by rain into groundwater. Heavily leached soils also have a tendency to be easily eroded as the water washes away soil particles quickly. The farmer must try to prevent nitrates leaching through the soil, to limit the economic and environmental costs that this would generate. From this time onwards, leaching and erosion of soil was severe, causing major alluviation of valleys. In either case the toxic or radioactive waste is trapped in the solid, preventing it from leaching into the local water table. The iron oxide presumably gets leached out from the surface of the cultivated land. Combined effects of leaching fraction salinity and potassium content of waters on growth and water-use-ef®ciency of wheat and barley. Nutrient solutions were allowed to remain in the leaching columns for 4 d prior to commencement of leaching with distilled water. Over the past decades these low molecular weight compounds may have been evaporated, leached, or transported out of the area. The original study also included a pesticide leaching component and a human health component. Using artificial neural networks and regression to predict percentage of applied nitrogen leached under turfgrass. Nitrogen leaching from conventional versus organic farming systems - a systems modelling approach. Analysis of anions leached from rock samples suggests that subsurface pyrite weathering is centered at two zones within the ore body. Table 1 shows the total amounts leached in about 20 pore volumes. Hence, these species will most likely germinate when sufficient salt has been leached from the sediments. External origin (dry deposition) and internal cycling (leaching process) can account for most elements, with different intensities. The amount of nutrients leached from leaves and boles was taken as the total amount in throughfall and stemflow minus the input in precipitation. The amount leached will be subject to variation in temperature, which drives evaporation and plant growth, and rainfall which affects plant growth and leaching. Average carbofuran leaching decreased as a result of the reduction in carbofuran use which resulted from the decrease in inherent productivities. As erosion increases, the chance of a high rate of leaching increases. The impacts on leaching were much more important. Hunting leaches into the ' natural ', ethnographic into the political. A parliamentary debate ensued over the specifics of that suppression order, which leached over into a discussion of press suppression more broadly. Potassium distribution in a sandy soil exposed to leaching with saline water. Another advantage to soil fertility brought by these plants is related to recycling of nutrients that have been leached to deep soil layers1. Nitrogen leaching from conventional versus organic farming systems-a systems modelling approach. Nitrogen recycling by nonleguminous winter cover crops to reduce leaching in potato rotations. A full 55% of respondents reported observing a reduction in nitrates leaching from their farms. Potassium dynamics and availability in strongly weathered and highly leached soils in the humid tropics. The actual values of leaching seeds sampled along the rehydration time scale are presented as the leakage data. In addition, leaves that showed signs of decomposition, such as discolouration due to leaching or microbial attack, were discarded. Potassium release is predominantly as a result of leaching from plant material. Rates of basalt chemical weathering have not been measured and the uncertainty of the amounts leached has been mentioned. Amelioration of subsurface acidity by leaching of surface applied amendments. Containers with leaf discs but no shredders served as controls and provided estimates of weight loss resulting from leaching and microbial processing. Complete composting normally allows for the degradation of phytotoxic intermediates and synthetic compounds, such as herbicides, as well as allowing for leaching of salts. Indeed, receptor molecules may be progressively leached from the plasma membrane as the system of culture degenerates with time. The main environmental need in these systems may be simply to limit the external impacts such as nutrients leaching and odours from the system. Consequently, when there was enough percolation water (through rainfall or irrigation), the soil nitrate may easily have been leached into the groundwater. Due to the high temperature and the relatively high rainfall of this region, however, the soils are strongly weathered and leached. Models can provide useful estimates of leaching and thus aid in the control of losses. Subsequent chapters deal with soil temperature, water and energy balance before moving on to plant growth and, ®nally, leaching. Subsequently, the leached salts are removed into the drainage base of the region - usually an adjacent lake or the sea. Microbially produced oxalic acid leaches out iron oxides from the colonized layer, forcing the iron to accumulate in the zone below. Three seeds per column were planted in a subset of 10 leaching columns packed with oxide-coated sand. Potassium and magnesium showed higher turnover rates than organic matter (indicating leaching) but those of manganese, nitrogen and phosphorus were lower (indicating relative enrichment). The former relates to the initial fragmentation and leaching whereas the latter represents the full spectrum of decomposition stages. If contaminants are found to be leaching from a dump, then clearly some remedial action is required. Under field conditions, volatiles from brassica residues are extremely short-lived (see below) and water-soluble compounds leached from the residues would likely have the largest impact on germinating seeds. The line fitted through these points shows that there is a tendency for leaching to increase faster than erosion, indicating a non-linearity in these relationships in space. Potassium leaching from a sandy soil. In practical agriculture, the model will be more useful in soils containing gypsum or leached with saline water than in either calcareous or non-calcareous soils leached with rainwater. Consequently, t hese unflooded f orests lie on welldrained terrains that tend to be heavily leached and nutrient-poor because they have long been deprived of alluvial sediments. Excessive use of inputs can result in environmental damage from input run-off, often associated with soil erosion, inputs leaching into the groundwater, and higher greenhouse gas emissions. In comparison to biologically fixed nitrogen, plants tend to use such fertilizer nitrogen inefficiently, leaving excess nitrate ions to be leached into the watershed as nutrient pollution29,47. As a result of high temperatures, high precipitation, and age, extremely weathered and leached soils with a low inherent soil fertility are often found in the tropics. The alkaline chemistry, and porous and unconsolidated nature make pumice deposits highly susceptible to water percolation, leaching and bioturbation, and a suitable parent material for soils. Pilot wetting trials showed that leaching columns retained 70-75 ml of solution at field capacity and in subsequent experiments 75 ml at field capacity was assumed. Each column was then leached repeatedly with 75-ml aliquots of distilled water in an attempt to bring both soils to a common low concentration of nutrients in solution. In aerobic soils or soils under upland cultivation, fertilizer applied as urea or ammonium is converted rapidly into the nitrate form which is very susceptible to leaching. The predictions will be of little value for leaching by rain in soils of temperate regions without the incorporation of a variable adsorption coefficient in the model. There is evidence that riparian zones can be managed in ways which help to reduce nutrient leaching in surface water catchments and encourage species diversity. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 I fear that the third matter—the leaching into the river of pollutants from the domestic areas of our valleys—has not received adequate attention. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 No particulars have leached me except a newspaper cutting making a general allegation but giving no name or other details. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 In this connection the use of the basement courts for staff is under consideration, but no decision has been leached. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Our primary objective is to quantify the amount of nitrate leached under different cropping and land management practices. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Along come the winter rains and that is leached out of the soil. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The solution may be to incinerate the contamination or to pump out the leaches and to treat it with a particular chemical. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 However, the fertility of the land is leached out within a very short period and a desert develops. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 A small population lived chiefly off yak herding and barley growing, leaving fields fallow for long periods to prevent leaching and erosion. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Leaching of artificial fertilisers is only one source of nitrate. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The resultant glass is highly resistant to leaching by water and to radiation damage. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Avoiding leaching from fissile materials is a far more difficult problem to deal with at second hand. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 First, there will be a considerable amount of leaching out of the refuse tip and that will pollute the lagoon. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 He identified leaching of the soil, magnesium and so on. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Perhaps he will tell us how much leaching there will be, whether it will be dangerous and what damage it will cause. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The whole of the caverns would be leached out hydraulically. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 I think the scientific term would be "leaching". From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The freedom to act locally in financial terms according to the wishes of the local electorate has been substantially leached away. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 There is general recognition that we need a proper basis for tackling the problems of landfill gas and leaching at closed landfill sites. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 There are ways of reducing the present rate of leaching in certain areas which have now been declared nitrogen sensitive. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The nitrogen is not wasted and it is not leached out of the soil. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Relaxation of these measures would entail a high risk of increased nitrate leaching so there are no plans to allow exemptions under licence. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Water leached through it, and the result was radioactivity in streams. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 We had a bad season last year and a lot of leaching occurred. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Ozone and aluminium leached from the soil may also be responsible. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 The methane is extracted safely, and there are special precautions to prevent leaching into the water courses. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 Given that health and safety procedures were not as rigorous even a few years ago, might the materials be leaching into the ground? From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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