Humic Matter in Soil and the Environment: Principles and Controversies - Chapter 5 pot

... discussed in detail. Chapter 9 covers the environmental and industrial importance of humic matter. The outstanding role humic matter plays in preser- vation of soil organic matter, mobilization and ... Concepts in the Early Twentieth Century 2.1.3 The Dawn of Modern Concepts 2.2 Distribution of Humic Matter 2.2.1 Humic Matter in Soils 2.2.2 Hu...

Ngày tải lên: 11/08/2014, 12:21

... Reserved. 16 Chapter 2 has been reported that humic acid can be subdivided into a- and P -humic acid. (Russell and Russell, 1 950 ). The name a -humic acid is used for the initial or original humic ... substances are mostly in the form of Fe- and Al-humates and hlvates. Other groups of soils containing hurnic matter are the ultisols and oxisols, soils gen...

Ngày tải lên: 11/08/2014, 12:21

... the melanoidin pathway or Maillard's reaction. Sugar and amino acid form the starting points, instead of lignin or phenol and quinone, as is the case in the ligno- protein and phenol-protein ... than protein and amino acids in the issue of humic matter formation. For a long time they were regarded as contaminants rather than as precursors of humic matte...

Ngày tải lên: 11/08/2014, 12:21

... Dekker, Inc. All Rights Reserved. Chemical Composition of Humic Matter 131 minimal. Most of the liberated carbon is apparently retained in the soil in the form of humic matter, since both humic and ... Environments in Atomic Percentages Tropical Region Soils HA-Alfisols HA-Andosols HA-Oxisols FA-Andosols Temperate Region Soils HA-Alfisols HA-Aridisols (Solon...

Ngày tải lên: 11/08/2014, 12:21

... peptides may be linked to the central core of the humic molecule by H-bonding. The con- ventional way to analyze N compounds in soil and humic acid is by using standard hydrolysis and chromatographic ... Aliphatic C- H, CC-H, C-H stretch of methyl groups C - H bending COO- antisymmetrical stretch Salts of COOH C-0 stretch, aromatic C-0, C-0 ester linkage, phen...

Ngày tải lên: 11/08/2014, 12:21

... have the potential for enhancing polymerization of humic matter by linking the individual molecules together into chainlike structures. The metal -humic acid complex remains soluble when the ... fulvic and humic acids. The data in the table indicate that com- paratively the value of log K, increases from Mg-FA -+ Zn-Fa and to Cu-FA chelates, suggesting th...

Ngày tải lên: 11/08/2014, 12:21

... cycle involves an outer cycle representing the overall cycle, and an inner cycle which occurs in the soils. In the inner cycle, the NO ,- is not denitrified, but consumed by plants and soil ... Importance of Humic Matter 273 decomposition process, on the other hand N is being added in the humic structure. These processes cause the C/N ratio of the h...

Ngày tải lên: 11/08/2014, 12:21

... between the steam system and the vapour space above the flashing brine which can introduce approximately 0. 5- 1 .0% of the steam flow into the MSF process; vapour contaminants should be swept into the ... monitored in the brine or cooling water systems because they are not expected to be contained in large quantities in these sidestreams of the thermal desalinatio...

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Ngày tải lên: 02/07/2014, 20:20

... income categories and expenditure pat- terns, the links between wages and profits, on the one hand, and consump- tion and investment, on the other, are also cut. At the beginning of each period, ... obtain the best balance between the income received in payment for these services and the sacrifice involved in their supply. Finally, the entrepreneurs try to attain...

Ngày tải lên: 06/07/2014, 04:20