Handbook of Econometrics Vols1-5 Chapter 11 ppt

... chromatograms of a derivative of thiosulfate obtained from blood of a victim who died of hydrogen sulfide poisoning. m/z 426: the derivative of thiosulfate; m/z 314: IS. ⊡ Table 2.3 Concentrations of thiosulfate ... of specimens GC/MS analysis of thiosulfate (a metabolite of hydrogen sulfi de) in blood and urine ⊡ Table 2.4 Concentrations of thiosulfate in blood after dea...

Ngày tải lên: 26/01/2014, 18:20

... 11. 1 Introduction 230 11. 2 Trace Metals in Soils and Crops 230 11. 2.1 Trace Metals 230 11. 2.1.1 Zinc 230 11. 2.1.2 Copper 231 11. 2.1.3 Manganese 232 11. 2.1.4 Iron 232 11. 2.1.5 Molybdenum 232 11. 2.1.6 ... Molybdenum 232 11. 2.1.6 Chromium 232 11. 2.1.7 Cobalt 233 11. 2.1.8 Nickel 233 11. 2.2 Biogenic Trace Metals 233 11. 2.2.1 Cadmium 233 11. 2.2.2 Lead 233 11. 2.2.3 Me...

Ngày tải lên: 18/06/2014, 19:20

... incubation of soils treated with cellulose as a pos- sible index of the nitrogen status of soils. J. Sci. Food Agric. 12:763–765, 1961. 119 . D.S. Jenkinson. Studies of methods of measuring forms of available ... concentrations of nitrogen that exceed 3% of the dry mass of mature leaves. Leaves of grasses (Gramineae, Poaceae) (1.5 to 3.5% N) are typically lower in total n...

Ngày tải lên: 02/07/2014, 00:20

... 147 6.3 Diagnosis of Magnesium Status in Plants 148 6.3.1 Symptoms of Deficiency and Excess 148 6.3.1.1 Symptoms of Deficiency 148 6.3.1.2 Symptoms of Excess 149 6.3.2 Environmental Causes of Deficiency ... concentrations of calcium, relative to magnesium, are inhibitory to the absorption of magnesium and vice versa (34,35,37,86,90,108 110 ). In the early 1900s, the importance of...

Ngày tải lên: 02/07/2014, 00:20

... concentration of 100 mg kg Ϫ1 (68). Because igneous rocks and parent materials in gen- eral contain only minor amounts of chloride, little of this nutrient arises from weathering. Most of 286 Handbook of ... Crops A review (4) of chlorine nutrition tabulated the concentrations of chloride in a wide variety of crops. The compilation of data in Table 9.2 shows that concentra...

Ngày tải lên: 02/07/2014, 00:20

... Nikolic University of Belgrade, Belgrade, Serbia CONTENTS 11. 1 Historical Information 329 11. 1.1 Determination of Essentiality 329 11. 2 Functions in Plants 330 11. 3 Forms and Sources of Iron in Soils 330 11. 4 ... 335 11. 5.3 Iron Levels in Plants 336 11. 5.3.1 Iron Uptake 336 11. 5.3.2 Movement of Iron within Plants 338 11. 6 Factors Affecting Plant Uptake 339 11. 6.1 So...

Ngày tải lên: 02/07/2014, 00:20

... excess of one nutrient can aggravate a deficiency of another, and so symptoms of man- ganese toxicity bear some features of deficiency of another nutrient. Additionally, toxicity of man- ganese is often ... 7/14/2006 11: 19 AM Page 364 358 Handbook of Plant Nutrition TABLE 12.1 List of Critical Concentrations of Manganese in Various Agricultural Crops Concentration of Gr...

Ngày tải lên: 02/07/2014, 00:20

... knowledge of the complete biological significance of nickel for plant productivity is still quite limited; however, with the demonstration of the essentiality of nickel in diverse species (1,2) 396 Handbook ... concentrations of urea as high as 2.4% dry weight. The accumulation of urea occurred irrespective of the nitrogen source used and was assumed to have occurred as a resul...

Ngày tải lên: 02/07/2014, 00:20

... increased application of SO 4 2Ϫ fertilizer. Volatilization of selenium is also influenced by the chemical form of selenium in the growing medium. The rate of selenium volatilization of a hybrid poplar ... accumulate large amounts of it has been considered (11) . Uptake and accumulation of selenium by plants is determined by the form and concentration of selenium, the presence...

Ngày tải lên: 02/07/2014, 00:20

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