Humic Matter in Soil and the Environment: Principles and Controversies - Chapter 7 pps

... 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

... groups of humic matter, e.g., soil humic matter, aquatic humic matter, hurnic matter from wetlands, geologic humic matter, and anthropogenic humic matter. MARCEL DEKKER, INC. 270 Madison ... explained earlier as the group of humic matter in soils, composed of substantial amounts of humic acid and fulvic acids. According to the ligno-protein theory t...

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 ... using the name phenol-protein theory in analogy to the ligno-protein theory. All these names can also be considered misnomers, since not only phe- nols, but also quin...

Ngày tải lên: 11/08/2014, 12:21

... apparently retained in the soil in the form of humic matter, since both humic and fulvic acids exhibit C contents in the range of that in plant residues. The hydrogen content of humic and fulvic ... HA-Oxisols FA-Andosols Temperate Redons Soils HA-Afisols HA-Aridisols (Solonetz) HA-Histosols (Peat-bogs) HA-Inceptisols HA-Mollisols HA-Spodosols HA-Ulti...

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 ... paramagnetism in humic acids owing to the presence of semiquinones and hydroxy-quinones. This was followed later by Riffaldi and Schnitzer (1 972 ), Senesi...

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

... 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 humic substances to decline to the narrowest ... 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...

Ngày tải lên: 11/08/2014, 12:21

... nationally in the pro- duction of cotton and groundnuts, and second in the production of tobacco. It is also known for ushering in the dairy revo- lution in the country. The industrial struc- ture of the ... cross-subsidization and increases in administra- tive expenses, Indian Railways has experienced an increas- ing financial burden and a decline in transport...

Ngày tải lên: 08/08/2014, 10:23

... morning to pay the debt of the preceding evening. On their side, the three Musketeers were much attached to their young comrade. The friendship which united these four men, and the want they ... concerning his three new-made friends. He formed, therefore, the resolution of believing for the present all that was said of their past, hoping for more certain and extended r...

Ngày tải lên: 02/07/2014, 03:20

... find the Ghost foaming along, wing -and- wing, and every sail drawing except the jibs, with a fresh breeze astern. Oh, the wonder of the great trade-wind! All day we sailed, and all night, and ... the swelling sails, the foaming wake, and the heave and the run of her over the liquid mountains that are moving with us in stately procession. The days and nig...

Ngày tải lên: 02/07/2014, 16:21