Soil characteristics

Xem 1-20 trên 28 kết quả Soil characteristics
  • This paper presents the results of soil characteristics study and orientation for rational and sustainable use of major soil types in Thai Thuy District, Thai Binh Province, where is facing many environmental problems. The interactive process between river, sea and human activities over time has resulted in the characteristics of 10 soil types, which are grouped in 4 main classes (acid sulfate soil, saline soil, alluvial soil and sandy soil). They have been used for agricultural production (mainly for rice and other crops growing).

    pdf5p dem_thanh 22-12-2012 37 7   Download

  • Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Soil characteristics under selected broadleaved tree species in East Norway...

    pdf12p toshiba3 09-09-2011 21 1   Download

  • Why do some contaminants remain in soils indefinitely? How much of a threat do they pose to human health or the environment? The need for effective and economic site decontamination arises daily. Geoenvironmental Engineering: Contaminated Soils, Pollutant Fate, and Mitigation discusses why soils remain contaminated, focusing on the development of the factors, properties, characteristics, and parameters of soils and individual contaminants.

    pdf32p tuongmatdo 10-12-2011 101 24   Download

  • The Voi Mep massif of the Truong Son range, having the highest peak in the Quang Tri area (1739m), is composed of granite and granodiorite intrusive rocks in Ben Giang-Que Son complex. This massif is fairly isometric with characteristic landforms comprising: remnants of old pediment surfaces, mountain slopes and valleys with steep profiles.

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  • Research objectives: To elucidate of characteristics of lithological composition, physicalmechanical properties and distribution of Quaternary sediments, the relationships between sediment characteristics, especially, the soft soil layers in the West Hanoi to land subsidence and ground collapse; then to propose prevention measures for sustainable development of infrastructure.

    pdf27p change03 06-05-2016 8 1   Download

  • Cancers of the endometrium, ovary and cervix share certain characteristics. However, etio-pathogenesis of all the gynecological malignancies is yet to be explored. Even though the etiologic factors are generally environmental, the exact cause of each gynecological cancer is not known (Senate Community Affairs References Committee, Commonwealth of Australia, 2006). Worldwide, cancer incidence rates vary widely between different geographic regions and ethnic groups.

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  • Our sample contains a total of 1301 open-end, no-load U.S. domestic equity mutual funds, which include actively managed funds, index funds, sector funds, and ETFs (exchange traded funds). Monthly net returns, as well as annual turnover and expense ratios for the funds, are obtained from the Center for Research in Security Prices (CRSP) mutual fund database over the sample period January 1975–December 2002. Additional data on fund investment objectives are obtained from the Thomson/CDA Spectrum files.

    pdf38p quaivatdo 19-11-2012 27 5   Download

  • The Commission stresses the need for a differentiated and calibrated approach which is adapted and proportionate to the size and characteristics of both the audited company and its auditor and will seek, in the case of any potential proposal that may emerge as a result of this Green Paper, to modulate any such proposals to take this into account. What may be necessary for large systemic institutions may not be appropriate for other listed companies or for SMEs or SMPs. Any measures which the Commission would propose as a follow-up to the present consultation would be subject to ...

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  • How much of a supplemental nutrient to apply should be determined based on prior experience of the farmer, obser- vation of plant growth, knowledge of soil characteristics such as organic matter, cation exchange capacity, phosphorus and potassium supplying ability, and base saturation, knowl- edge of crop needs and field history, and understanding of the nutrient supplying power of the material to be used. An example of nutrient application rates is provided in Table 2. Overapplication can cause problems in crop production as well as in the environment.

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  • It has been demonstrated that most heavy metals that are in the fuels or raw materials used in cement kilns are effectively incorporated into the clinker, or contained by standard emissions control devices (WBCSD 2002; European Commission (EC) 2004; Vallet January 26, 2007). A study using the EPA’s toxicity characteristic leaching procedure to test the mobility of heavy metals in clinker when exposed to acidic conditions found that only cadmium (Cd) could be detected in the environment, and at levels below regulatory standards (5 ppm) (Shih 2005).

    pdf0p loixinloi 08-05-2013 21 4   Download

  • While disentangling the returns to schooling from the returns to unobserved ability is difficult, estimating the returns to college quality is harder still. No good instruments have been found for college quality, and the sample sizes of twins are often too small to obtain accurate estimates of the returns to college quality. 6 A notable exception is Berhman et al. (1996), who find that, after controlling for family background characteristics using twins, there are significant returns to attending colleges of higher “quality” in several observable dimensions.

    pdf0p thieubaotrang 16-04-2013 19 3   Download

  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Comparative studies of the water relations and the hydraulic characteristics in Fraxinus excelsior, Acer pseudoplatanus and A. opalus trees under soil water contrasted conditions Damien Lemoinea, Jean-Paul Peltierb and Gérard ...

    pdf10p toshiba6 05-10-2011 12 1   Download

  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: " Effects of liming and gypsum regimes on chemical characteristics of an acid forest soil and its leachates...

    pdf12p toshiba6 07-10-2011 20 1   Download

  • Arthur Young at the end of the eighteenth century found only two kinds of cart horses worthy of mention, the Shire and the Suffolk Punch; to-day, besides these two, we have the Clydesdale. The Shire horse, according to Sir Walter Gilbey, is the purest survival of the Great Horse of mediaeval times, known also as the War Horse, and the Old English Black Horse. It is the largest of draught horses, attaining a height of 17 to 17.3 hands and a weight of 2,200 lb., its general characteristics being immense strength, symmetrical proportions, bold free action, and docile disposition....

    pdf14p asus1122 24-10-2012 21 1   Download

  • Constructed wetlands are known widely by their characteristic properties like utilization of natural processes, simple and easy of construction, operation and maintain as well. The constructed subsurface flow wetland is designed as a tank with an impervious boundary to prevent seepage and contain a suitable porous media in which emergent plants grow. The water remains below the surface of the gravel/stone/rock media. Soil in constructed subsurface flow wetland absorbs and stores organic matter several years.

    pdf6p quangdat 15-03-2009 216 30   Download

  • The study of geology, soils in the selection of sites for water spreading or infiltration recharging system are rather more important than for any well recharging systems. The basic aspects, which are considered, are: Moving the water through the vadose zone Making the water move through aquifer away from infiltration recharge sites so as to raise water buildup of ground water mound or ridge Therefore, for infiltration recharge systems the following area characteristics are desirable...

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  • Based on the passage information, which of the following characterizes the northern part of the Central Andes’ high-altitude plateaus? (A) high relative humidity (B) fertile soil (C) a succession of agricultural zones (D) extremes in air temperature (E) an arid climate 37. Based only upon the information in the passage, which of the following is a characteristic of the Central Andean cordillera that clearly distinguishes it from the Northern Andean cordillera? (A) (B) (C) (D) (E) an arid climate a sparse human population wet forests a humid climate a dry season ...

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  • 6 Study on the Intra-Annual Distribution Characteristics of the Water Budget in the Hilly Region of Red Soil in Northeast Jiangxi Province, China Junfeng Dai, Jiazhou Chen, Yuanlai Cui, and Yuanqiu He 6.1 INTRODUCTION In northeast Jiangxi Province, water balance is important for water resource utilization and agricultural regionalization. In this region, the red soil is affected by the subtropical monsoon climate in which rainfall is abundant, but unevenly distributed (Chen and Zhang 2002). The high intensity of rainfall leads to water loss during the rainy season.

    pdf11p giangsinh_trang 03-01-2012 27 9   Download

  • Domestic pig characteristics: Domestic pig derived from European wild boar. Snout movable—specialized for digging roots and tubers from soil. Nostrils located at end of flattened nose. Tusk-like upper canines (larger in males) grow upward and outward. Lower canines grow upward and backward to fit against larger upper canines. Upper and lower canines rub against each other, usually producing sharp edges. Elongated skull has sloping profile. Long, pointed head, small eyes, long ears; short neck. Four digits per limb, only two middle digits functional; walks on toes.

    pdf12p audi123 31-07-2010 48 8   Download

  • 3 Soil Bioengineering The transformation of watersheds is a characteristic of human civilization. Humans transform natural landscapes into various kinds of “land use” that provide them with habitation and resources. Altered hydrology and soil erosion occur as a consequence of these transformations.

    pdf48p thegun16 29-11-2010 43 8   Download

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