Search results: Found 2

Listing 1 - 2 of 2
Sort by
Enhancing Soil Health to Mitigate Soil Degradation

Authors: ---
ISBN: 9783038423584 9783038423591 Year: Pages: VIII, 328 DOI: 10.3390/books978-3-03842-359-1 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Environmental Sciences
Added to DOAB on : 2017-06-20 09:44:18
License:

Loading...
Export citation

Choose an application

Abstract

Five of the top ten problems facing humanity (http://cnst.rice.edu/content.aspx?id=246) over the next 50 years (food, water, energy, environment and poverty) are directly related to the health of soil resources. Several different factors, including: (a) excessive tillage; (b) inappropriate crop rotations; (c) excessive grazing or crop residue removal; (d) deforestation; (e) mining and/or fracking; and (f) construction or urban sprawl, have contributed to the global problem of soil degradation. Understanding and implementing sustainable agricultural and land management practices that improve soil health is essential for mitigating and reversing these trends, if we are to successfully meet the needs of more than 9.5 billion people who will be sharing our fragile planet by the middle of the 21st century.The overall focus for this Special Issue was on agricultural factors contributing to soil degradation and suggested strategies for mitigating and reversing those trends. The discussion was anchored by invited contributions reflecting perspectives from Africa, Australia, China, Eastern Europe, India, Latin America, North America, Russia, and Western Europe. Voluntary contributions were evaluated, and incorporated into the issue to provide a global perspective on soil degradation and strategies to mitigate its devastating effects.This Special Issue draws upon published literature addressing soil quality and/or soil health, soil and crop management strategies to mitigate soil degradation, and future research needs and strategies that will steadily improve the fragile layer that lies between us and starvation. Your participation and contributions to this important endeavor were most welcome.

Carbon, Nitrogen and Phosphorus Cycling in Forest Soils

Author:
ISBN: 9783038976820 / 9783038976837 Year: Pages: 238 DOI: 10.3390/books978-3-03897-683-7 Language: eng
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Biology --- Forestry
Added to DOAB on : 2019-06-26 08:44:06
License:

Loading...
Export citation

Choose an application

Abstract

The majority of carbon stored in the soils of the world is stored in forests. The refractory nature of some portions of forest soil organic matter also provides the slow, gradual release of organic nitrogen and phosphorus to sustain long term forest productivity. Contemporary and future disturbances, such as climatic warming, deforestation, short rotation sylviculture, the invasion of exotic species, and fire, all place strains on the integrity of this homeostatic system of C, N, and P cycling. On the other hand, the CO2 fertilization effect may partially offset losses of soil organic matter, but many have questioned the ability of N and P stocks to sustain the CO2 fertilization effect.

Keywords

carbon distribution index --- moisture gradient --- soil organic matter fraction --- soil degradation --- soil available nitrogen --- soil available phosphorus --- temperature --- stand density --- charcoal --- forest soil --- carbon mineralization --- microbial activity --- nitrification --- polyphenols --- temperature --- soil microbial communities --- PLFA --- seasons --- nitrogen dynamics --- gross nitrogen transformations --- Daxing’an Mountains --- climatic factors --- soil nutrients --- forest types --- principal component analyses --- soil structure --- soil pH --- Oxisol --- variable-charge soils --- aluminum accumulator --- seasonal trends --- beech forests --- soil enzymes --- organic matter --- multilevel models --- near natural forest management --- Pinus massoniana plantation --- Cunninghamia lanceolata plantation --- soil greenhouse gas flux --- biolability --- tree-DOM --- dissolved organic matter (DOM) --- carbon --- dissolved organic carbon (DOC) --- stemflow --- throughfall --- alpine forest --- ammonia-oxidizing bacteria --- ammonia-oxidizing archaea --- ammonium --- nitrate --- revegetation --- microbial biomass --- chloroform fumigation extraction --- enzyme activities --- stoichiometric homeostasis --- the Three Gorges Reservoir --- Eucalyptus sp. --- wood volume --- second production cycle --- annual increment average --- soil fertility --- nutrient cycling --- Chamaecyparis forest --- humic substances --- 31P nuclear magnetic resonance spectroscopy (31P NMR) --- P species --- topography --- net primary productivity --- climate zone --- climate --- soil N --- litter N --- climate change --- manuring --- manure pelleting --- northern temperate --- pyrolysis --- information review --- leaf N:P ratio --- P resorption efficiency --- soil P fractions --- P stock --- stand age

Listing 1 - 2 of 2
Sort by
Narrow your search

Publisher

MDPI - Multidisciplinary Digital Publishing Institute (2)


License

CC by-nc-nd (2)


Language

eng (1)

english (1)


Year
From To Submit

2019 (1)

2017 (1)