solutions of the conduction equation
SOIL ECOLOGY IN SUSTAINABLE AGRICULTURAL SYSTEMS - CHAPTER 1 ppsx
... as follows (Brussaard et al., 1988): Tuning of the nutrient supply of the soil to the nutrient demand of the plant Enhancement of the contribution of soil organisms to soil structure formation ... INTA Most of the cracks had a horizontal orientation in CONVB, none of them in INTA (Schoonderbeek and Schoute, 1994) Together with the lower macroporosity of the topsoil in CONVB, these observations ... Netherlands.) Hypothesis #3 — The stability of soil aggregates is higher in INT than CONV because of the higher organic matter content and the higher contribution of earthworms to the formation of stable...
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INTERRELATIONSHIPS BETWEEN MICROORGANISMS AND PLANTS IN SOIL doc
... society at large The study of the function of microorganisms in the root system of crop plants and in'its immediate vicinity, the effect of the plants themselves on this function, the interrelationships ... the staff of the Department of Microbial Ecology and Department of Experimental Mycology of the Institute of Microbiology, Czechoslovak Academy of Sciences, who helped with the organization of ... microorganisms in the rhizosphere, the elucidation of the mechanisms of microbial action in the agroecosystom all these lines of research are intimately associated with the problems of soil fertility...
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Báo cáo lâm nghiệp: "Effects of soil temperature on gas exchange and morphological structure of shoot and root in 1 yr old Scots pine (Pinus sylvestris L.) seedlings" pot
... slightly and then decreased after 11 d All seedlings recovered 18 d after the onset of the experiment The patterns of g evolution at the constant temperature of 8.7°C and at a were throughout the experiment ... at constant 12°C during the first 11 d and then declined sharply (Fig 2) At constant 8.7°C, the transpiration rate remained at the same level for 11 d and then declined The transpiration rate ... photosynthesis was changing differences soil temperature quite simi- lar declined as soil temperature increased After 18 d, photosynthesis recovered up to the level of other treatments Photosynthetic...
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Báo cáo khoa học: Relationship between the structure of guanidines and N-hydroxyguanidines, their binding to inducible nitric oxide synthase (iNOS) and their iNOS-catalysed oxidation to NO pptx
... about the thermodynamics and kinetics of the binding of guanidines and N-hydroxyguanidines to iNOS Removal of the a-amino or a-carboxylate moiety of l-Arg has important effects on the ability of the ... of l-Arg leads to conversion of the minor population of heme centres being in the LS state into the HS state and to the appearance of a difference spectrum [22,25–27] However, the intensity of ... nor-l-Arg, the analogue bearing one methylene fewer than l-Arg Removal of either the a-COOH or the a-NH2 group of NOHA led to a dramatic decrease in the affinity of the resulting compounds, the Kapp...
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Báo cáo khoa họcRe-engineering the discrimination between the oxidized coenzymes NAD+ and NADP+ in clostridial glutamate dehydrogenase and a thorough reappraisal of the coenzyme specificity of the wild-type enzyme docx
... analysis conrmed the identity of the contaminant Comparison with the spectrum of an authentic NAD+ sample revealed total similarity of the fragmentation pattern The negative portion of the spectrum ... (results not shown) The binding of the reduced coenzymes to the active site of clostridial glutamate dehydrogenase is much tighter than the binding of the oxidized coenzyme Together with the initial ... effect of the NADH formed in the rst part of the reaction was observed on the following phase of the reaction with NADP+ This effect was conrmed by enriching the mixture with varying amounts of NADH...
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Báo cáo khoa học: "STRUCTURE OF SENTENCE AND INFERENCING IN QUESTION ANSWERING" docx
... d elements of the meaning of the sentence) belonging to the topic of the answe@ What did John with the letters? (a letter rather than the verb being included in the topic), etc.; the criterion ... ere not discussed, then it can be stated that the root of every tree of the mentioned kind is labelled by a symbol the lexical part of which belongs to the word class of verbs The kinds (and to ... part also the order) of the dependency edges going from a node to those dependent on it are determined by the valency frame of the governing word (included in the lexical entry of the given lexical...
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Báo cáo hóa học: " Relationship between structural changes, hydrogen content and annealing in stacks of ultrathin Si/Ge amorphous layers" docx
... the size of the H bubbles to the critical value for their explosion and formation of craters The results of this study would confirm that the origin of the structural degradation of the MLs of ... function of the H flow rate as determined by ERDA associated with the contamination at the surface either of the deposited layer or of the substrate The tail behind the H peak is due to the multiple ... and at 2010 cm-1, which are the fingerprints of the monohydride bonds of H to Ge and Si, respectively [10,18-20] The shape of the Si-H peak indicates that the peak of the Si di-hydride bond, Si-H2,...
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Báo cáo lâm nghiệp:" Structure, spatial distribution and competition in mixed jack pine (Pinus banksiana) stands on clay soils of eastern Canada" pps
... change the relative dominance of species Our study could also have implications for the development of growth and stand dynamics models of the boreal mixed woods of Canada Among other things, they ... structure of Pinus banksiana at the southern edge of the Canadian boreal forest, J Veg Sci (1993) 783–790 [18] Gerry A.K, Wilson S.D., The influence of initial size on the competitive response of six ... 2.3.1 Age structure The quartiles of age (1st quartile, median and 3rd quartile) of the jack pine population of each stand were used in order to compare the age structure of the three stand types...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 3 pot
... part of the LF The amount of C and N recovered in the CF (g C or N in per gram fraction of soil), typically
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 5 doc
... in the degree of suppressiveness (Darby, 2003) In other words, the low rate of DMS amendment was not suppressive in the first year but was as suppressive as the high rate in the second year The ... (Garrett, 1956), the content and availability of the substrate in the organic material, tolerance to the antagonism or competition of other soil microbes (Rush et al., 1986), and presence of specific ... suppression is generated by the sum of the activities of the overall microbial biomass, and specific suppression is generated by the activities of one to a few populations of organisms (Cook and Baker,...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 6 pot
... such as the mucigel on plant roots and the plant cell wall are the first lines of defense Other defense mechanisms include (1) the hypersensitivity response (the death of host tissue around the point ... point of infection to stop spread), (2) lignification of the cell wall, (3) synthesis of cellulose or callose, (4) phytoalexin accumulation, (5) release of hydrolytic enzymes, (6) synthesis of proteinase ... were among the highest for both isolates and both hosts One isolate of G etunicatum (BR220) had total protein values almost twice that of the other isolates, but this was not true of the other G...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 8 pptx
... management, the fruits of the earth can be harvested in bounty However, the desire to obtain more from the land is often limited by the harsh realities of weather and pestilence Those who believe that they ... stubble-mulch tillage in the Great Plains of the U.S or shallow blade or disk tillage in the western wheat region of Canada These systems have become the convention rather than the exception According ... ridge tillage The extent of soil disturbance varies greatly with the type of equipment and number of cultivations with this system Ridges are typically formed, the tops scraped off to create...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 9 pot
... manure They suggested that under the climate conditions of northeastern U.S., ca 21% of the initial total N mineralizes in the first year, 9% of the N remaining after the first year mineralizes in the ... to the soil, organic nutrients become either part of the vegetation or the SOM, or they are lost from the field For N, losses occur via runoff, erosion, volatilization, and denitrification Of the ... long-term decline in nutrient reserves (Magdoff, 1991) One of the most important factors determining the level of SOM is the size of the C inputs to the soil (Rasmussen and Collins, 1991; Park,...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 10 doc
... in the study The authors emphasized the need for long-term studies, as many of their results were not apparent until after years Although most of the effects of reduced tillage are positive, there ... reduce the survival, growth, and reproduction of plants (Shipton, 1977; Bruehl, 1987; Burdon, 1987) Another example of the importance of microorganisms to agriculture is the production of antibiotics ... 10% of the earth’s microbial species have been identified or studied in any detail (Hawksworth, 1991a) The full potential of these groups of organisms has not been explored The diversity of microorganisms...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 11 (END) ppt
... other arthropods Rates of humification accelerate considerably by the passage of the organic material through the guts of earthworms Some of the final stages of humification are probably due to the ... increase the rates of mineralization of N, but surprisingly there are few estimates of the influence of earthworms on the overall net mineralization of N in bulk soils The enhanced mineralization of ... examined the number of species of fungi in the soil of a tropical pasture in India and in the gut and casts of the earthworm Drawida caleb living in the pasture These authors isolated 19 species of...
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Báo cáo y học: "The relation between the incidence of hypernatremia and mortality in patients with severe traumatic brain injury" pptx
... week of stay The nine missing daily Na measurements were replaced by the value of the previous day of the ICU stay The use of DDAVP, which we took as a surrogate marker for the presence of CDI, ... day), and the use of DDAVP (that is, presence of CDI) over the course of the ICU stay In order to adjust the estimates for the baseline risk of death, we used the core + CT score from the International ... forward until the day of censoring or death We not report the results of these analyses because they were virtually identical to those of the main analyses We examined linearity of the continuous...
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Land quality indicators and their use in sustainable agriculture and rural development pdf
... Accessibility of the land: the degree of remoteness from means of transport The presence of open freshwater bodies for use by humans, animals or fisheries Surface water storage capacity of the terrain: the ... country such as Rwanda, then their individual value depends on whether all these wetlands are of the same type or whether they are all different Also, the upland forests of central Amazonia may ... continuous stability of productivity level, but rather a resilience of the land; in other words: the capacity of the land to recover quickly to former levels of productivity - or to resume the trend to...
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Báo cáo lâm nghiệp:"Relationships between soil factors, Quercus robur health, Collybia fusipes root infection and Phytophthora presence" doc
... length of mother roots (t value of 1.35 and probability of 0.189) or the dry weight of fine roots per dry weight of mother roots (t value of 1.19 and probability of 0.854) DISCUSSION In the three ... between the crown health status of trees, rated as healthy or moderately declining and the length of mother roots per volume of soil (t value of 0.77 and probability of 0.447), the number of fine ... influenced the strategies of survival and the biology of Phytophthora species There was not clear relationship between the distribution of Phytophthora in the plots and the severity of soil waterlogging...
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Soil pH and Organic Matter pptx
... reaching the plant root, the metal cation either ‘unhooks’ itself from the chelate and diffuses into the root membrane or the entire metal-chelate complex is absorbed into the root, and then breaks ... before using them The stability of chelates (how well they complex metals) will depend upon specific micronutrient forms, soil pH, and the presence of bicarbonates and other metals ions in the soil ... decomposition rates and a rapid release of nutrients to the soil (Figure 4) Some of the most rapid rates of SOM decomposition in the world occur in irrigated soils of hot desert regions (Brady and Weil,...
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