digging a hole and preparation of the profile face
SOIL ECOLOGY IN SUSTAINABLE AGRICULTURAL SYSTEMS - CHAPTER 1 ppsx
Ngày tải lên :
11/08/2014, 15:20
... terms of the probability of workable days, CONVB and INTA were hardly different in critical periods of the year (i.e., spring and autumn) The risk of anaerobiosis was also similar, and the same ... in the water stability of 0.3- to 1-mm aggregates Water stability of macroaggregates in CONVB was and remained lower than in INTA or INTB The water stability of macroaggregates in CONVA was higher ... intensity of soil tillage; and increasing the recycling of crop residues and animal wastes Important objectives of these approaches are to match the supply of soil nutrients with the demands of the...
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INTERRELATIONSHIPS BETWEEN MICROORGANISMS AND PLANTS IN SOIL doc
Ngày tải lên :
29/06/2014, 09:20
... health and yields The application of biological preparations may in the future partially replace the use of agrochemicals and thus contribute to environmental improvement and enhancement of the ... has been isolated from harzianum (Claydon et al., 1987) Both the organism and the antibiotic are effective against -10- - R solani and a range of other pathogens and this metabolic property of ... of the assimilating surface was noticed in 30 variants and the increase of chlorophyll content in 25 variants (Table 2) -24- Table The influence of bacterization of photoassimilating characteristics...
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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
Ngày tải lên :
09/08/2014, 04:20
... constant 8.7°C, the transpiration rate remained at the same level for 11 d and then declined The transpiration rate in seedlings at changing soil temperature increased slightly and then decreased ... declined, although the temperature was increasing, and the relative growth rate and the amount of root tips were high (Table II) A possible reason is that low iniin tial soil temperature resulted in a ... photosynthesis and water relations with age and season in Abies amabilis Gan :J For, Res 14,77-84 Troeng E & Under S (1982) Gas exchange in Change a 20-year-old Scots pine I Net photosynthesis of current and...
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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
Ngày tải lên :
16/03/2014, 22:20
... and transient ternary complex between the protein, ImH and the l-Arg analogue [23] The konapp and koff app values are thus apparent association and dissociation rate constants of the guanidine ... unfavourable bulging conformation of the alkyl chain of homo-l-Arg The simultaneous presence of both the a- amino and a- carboxylate moieties appears to be necessary because the NOHA analogue bearing ... corresponding N-aryl-N¢-hydroxyguanidines that lead to kcat values of formation of NO as high as 83 and 69% that obtained for NOHA (Table 2) As in the case of the N-hydroxyguanidines, the kcat values of NO...
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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
Ngày tải lên :
06/03/2014, 00:20
... proportionality because the mm NAD+ in a standard assay is well above Km and the 0.3% NAD+ contamination in mm NADP+ is far below Km Nevertheless, a rate 200 of the rate in a standard NAD+ reaction ... spectrum of an authentic NAD+ sample revealed total similarity of the fragmentation pattern The negative portion of the spectrum displayed a fragment at m z 540, along with a small amount of parental ... with NAD+) The last sample allowed unambiguous identication of the peak of NAD+ in the other chromatograms (indicated by the arrow) The amounts of contaminant NAD+ present in the samples were calculated...
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Báo cáo khoa học: "STRUCTURE OF SENTENCE AND INFERENCING IN QUESTION ANSWERING" docx
Ngày tải lên :
24/03/2014, 05:21
... Pl~tek, Sgall and Sgall, in press) the nodes and edges of which are labelled A label of a node consists of a lexical meaning and a combination of ~rammatemes from different categories (the set of relevant ... general systemS Lualsdorff and Sgall (eds°) Ha~i~ov~ E° and P Sgall (1980), Linguistic Meaning and Knowledge Representation in Automatic Understanding of Natural Language, Prague Bull of MathematiCal ... the surface structure of sentences This is connected with the advantages granted by the universal character of natural language (ensuring that the framework is nottoo narrow and can be generalized...
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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
Ngày tải lên :
21/06/2014, 05:20
... assumed for the (100) Si wafer Results and discussion The calibration of the sputtering apparatus as regards the incorporation of H was done using ERDA by means of the single layers of a- Si and ... those of the single layers Nickel and Jackson [29] have speculated that the strain released as a consequence of the break of the Hhost atom bonds can be re-created by its propagation through the amorphous ... a- Si and a- Ge Figure 2a shows the ERDA spectra for the non-annealed a- Si layers hydrogenated at different flow rates The signal of the recoiled H atoms from the sample surface locates at channel...
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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
Ngày tải lên :
08/08/2014, 01:21
... 31] The data gathered by Longpré et al [28] is well suited for this type of application Among the size variables available, we chose tree basal area because it was available for every species and ... skewness in basal area distribution of jack pine between pure jack pine stands and stands composed of a mixture of jack pine and either of white birch or aspen Trembling aspen basal area distribution ... detrimental to jack pine germination before its alcaline content is drained away by rain The main weaknesses of these conclusions is in the lack of data on stands at an earlier developmental stage and for...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 3 pot
Ngày tải lên :
12/08/2014, 05:21
... Cambardella, and T.B Bailey (2000) Root-derived carbon and the formation and stabilization of aggregates Soil Sci Soc Am J 64, 201–207 Garland, J.L., and A. L Mills (1991) Classification and characterization ... dynamics of carbon and nitrogen in soils Ecology 68, 1181–1189 Aoyama, M., D .A Anger, and A Ndayegamiye (1999) Particulate and mineral-associated organic matter in water-stable aggregates as affected ... proportion of POM-C in surface soils from Eastern Canada was ca 20% in the CF (>53 µm) and 7% in the LF (
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 5 doc
Ngày tải lên :
12/08/2014, 05:21
... fungal, and bacterial plant pathogens and root, vascular, and foliar diseases of plants A variety of soil and rhizosphere bacteria and fungal isolates have been reported to turn on ISR in plants ... spermosphere of bean was reduced from 38% to 0% by alfalfa hay added at least d before beans were planted (Adams and Papavizas, 1969) Addition of sucrose and asparagine, or seed exudates, to compost-amended ... liming and acidifying materials, gypsum, and other amendments adjust soil pH and nutrient contents and ratios and can thereby impact plant growth, saprophytic microbial activity, and organic matter...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 6 pot
Ngày tải lên :
12/08/2014, 05:21
... groups, such as HA, can increase aggregate stability and the long-term stabilization of organic materials (Piccolo and Mbagwu, 1999) These aliphatic hydrophobic groups and polymers are the major contributors ... Production at each depth is the sum of glomalin on hyphae, attached to the horticultural mesh, and unattached scum porosity, which provides aeration and water infiltration rates favorable for plant and ... Glomalin and arbuscular mycorrhizal hyphae on the surface of a 1- to 2-mm aggregate separated from a Philippine soil provided by Dr Angela Almendras, Department of Agronomy and Soil Science, ViSCA Glomalin...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 8 pptx
Ngày tải lên :
12/08/2014, 05:21
... Location PEI, Canada PEI, Canada QC, Canada QC, Canada QC, Canada ON, Canada ON, Canada QC, Canada Brazil Georgia North Dakota Nebraska SK, Canada SK, Canada SK, Canada SK, Canada SK, Canada SK, ... Location Argentina Georgia Colorado Colorado SK, Canada SK, Canada SK, Canada SK, Canada AB, Canada SK, Canada SK, Canada SK, Canada Michigan Ohio Ohio Nebraska AB, Canada BC, Canada BC, Canada ... Location Georgia Colorado Colorado SK, Canada SK, Canada SK, Canada SK, Canada AB, Canada SK, Canada SK, Canada SK, Canada Qld, Australia Kentucky Illinois Minnesota Nebraska Nebraska Nebraska...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 9 pot
Ngày tải lên :
12/08/2014, 05:21
... Sustainable Agriculture An often-cited goal of sustainable agroecosystem management is to accumulate and maintain SOM (Magdoff and van Es, 2000) The challenges in determining nutrient availability ... rapid mineralization of C and other organically bound nutrients (Parr and Papendick, 1978) In addition, the breaking apart of macroaggregates by tillage increases the availability of occluded ... regions that have a high concentration of farm animals and limited land area to apply manure Throughout this chapter we have argued that adding plant and animal residues to the soil has positive...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 10 doc
Ngày tải lên :
12/08/2014, 05:21
... environmental quality, and promote plant and animal health (Doran and Parkin, 1994) It is easy to visualize a healthy, rich soil and to remember its smell Descriptive and analytical measurements of the ... years of wheat and barley residue maintenance by using no-till and high N fertilization in Australia, organic C, total N, and microbial biomass were higher and pH was lower at the soil surface ... substrate additions and adequate nutrition for a healthy soil and large, diverse populations of microorganisms Tillage and burning of crop residues often negatively and dramatically affect the...
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SOIL ORGANIC MATTER IN SUSTAINABLE AGRICULTURE - CHAPTER 11 (END) ppt
Ngày tải lên :
12/08/2014, 05:21
... Panneerselvam and Saravanamuthu, 1996; Ara et al., 1996; Karthikeyan and Karunanithi, 1996; Sanudo and Molina Valero, 1995; Dutta and Hegde, 1995; Diyora and Khandar, 1995; Nam et al., 1988; Kannaiyan, ... growth of this and other human pathogens Dash et al (1979) 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 ... (Collembola), and 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...
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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
Ngày tải lên :
13/08/2014, 16:21
... design MM, EA, EPa and AV coordinated the study UM, GR and EF performed the statistical analysis EF, UM and AC drafted the manuscript All authors read and approved the final manuscript 13 14 15 ... cerebral edema or raised intracranial pressure), urinary volume, mechanical ventilation, and intracranial pressure (ICP) when available The use of desmopressin acetate (DDAVP) was taken as a surrogate ... of each variate independently of the other (Adjusted for baseline risk of death and for each other) Finally, the hazard ratio associated with hypernatremia was estimated stratifying the Cox regression...
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Land quality indicators and their use in sustainable agriculture and rural development pdf
Ngày tải lên :
06/07/2014, 08:20
... initiatives on criteria and indicators for sustainable forest management These include the arid and semi-arid areas of Africa and Asia; Caribbean and Central American areas; and small island countries ... 37 basis of agro-environments, intensity of land use, and amounts of data available (AEZ x land use intensity x data availability) The case studies will utilize data available from the national ... some data are almost always available Also, several international agencies have collated and organized some of these data in computer compatible formats These stores of available data provide a useful...
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Báo cáo lâm nghiệp:"Relationships between soil factors, Quercus robur health, Collybia fusipes root infection and Phytophthora presence" doc
Ngày tải lên :
08/08/2014, 01:21
... with about 10% of sessile oak (Q petraea), established on former agricultural land on a calcareous plateau, along a 7% slope The soil was of a clay texture and presented no limitation to vertical ... multinomial distribution of the data was assumed and the cumulative logit link function was used Like in the variance analysis, each independent factor was first introduced alone in the model and thereafter ... rather infections that looked like Armillaria infections with brown lesions and mycelial fans at the cambium Armillaria was also detected on three other oaks in Mersuay, three oaks in Filain and...
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Soil pH and Organic Matter pptx
Ngày tải lên :
05/03/2014, 21:20
... Montana Nutrient Availability State University Soil Exchange Capacity Testing Laboratory (currently Soil, Plant, Water Analytical Cation and anion exchange capacities Laboratory) in Bozeman or the ... is calculated as CCE and represents the sum of the calcium and magnesium carbonates in a liming material As CCE increases, the acid neutralizing power in the lime Gypsum (CaSO4) wasn’t increases ... Carbon Sequestration and Conservation Carbon (C) cycling is the transfer of both organic and inorganic C between the pools of the atmosphere (carbon dioxide and methane), terrestrial and aquatic...
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