soil

Ergebnisse 193 – 204 von 306 werden angezeigtNach Durchschnittsbewertung sortiert

Forest Decline and Atmospheric Deposition Effects in the French Mountains
117,69 € In den Warenkorb
Nitrogen Fluxes in Intensive Grassland Systems
149,98 € In den Warenkorb
Manual for Soil Analysis – Monitoring and Assessing Soil Bioremediation
246,09 € In den Warenkorb
Mechanisms of Forest Response to Acidic Deposition
112,34 € In den Warenkorb
Modelling of Environmental Chemical Exposure and Risk
149,79 € In den Warenkorb
Patch Dynamics
85,55 € In den Warenkorb
$Honighäuschen (Bonn) - Agricultural soils are subjected to many applied mechanical stresses that influence their behavior. Stresses arise from tillage machines, seeders and chemicals applicators, tractors, and equipment for harvest and transport. Applied stresses may compact or loosen the bulk soil. Micro sections of soil (aggregates or clods) may be compacted during tillage while the bulk soil is loosened. Because most granular soils are combined into structural units of varying sizes with different strengths and properties, prediction of the effect of stresses on the behavior of bulk soils is difficult. The basic strength properties of soil are determined by many fac tors: the size distribution of particles, chemical and mineralogical properties of inorganic clay fraction, the organic matter content and composition, the water content and the stress history. These factors combine and interact to produce many possible behavior patterns. Changes in structure of the soil from applied stresses and biologi cal reactions may profoundly influence storage and transmission of water, heat, and air, and the mechanical resistance to penetration by plant roots. They may also affect the traction of vehicles. Manipulation of structural properties of soils by tillage implements is a major cost under most crop production systems. Reduced energy use is also a significant conservation objective. Improved management systems are very dependent upon a better understanding of soils' response to applied stresses. The content of this book resulted from a NATO Advanced Research Workshop held in St. Paul, Minnesota, U.S.A. September 13-16, 1988.$
Mechanics and Related Processes in Structured Agricultural Soils
181,89 € In den Warenkorb
Biological Nitrogen Fixation for Sustainable Agriculture
181,89 € In den Warenkorb
Management of Biological Nitrogen Fixation for the Development of More Productive and Sustainable Agricultural Systems
117,69 € In den Warenkorb
Cryosols
299,59 € In den Warenkorb
Ecophysiology of High Salinity Tolerant Plants
299,99 € In den Warenkorb
Secondary Metabolites in Soil Ecology
213,99 € In den Warenkorb

Asiatische Hornisse in der Region Bonn und Rhein-Sieg aufgetaucht

soil

Forest Decline and Atmospheric Deposition Effects in the French Mountains

Nitrogen Fluxes in Intensive Grassland Systems

Manual for Soil Analysis – Monitoring and Assessing Soil Bioremediation

Mechanisms of Forest Response to Acidic Deposition

Modelling of Environmental Chemical Exposure and Risk

Patch Dynamics

Mechanics and Related Processes in Structured Agricultural Soils

Biological Nitrogen Fixation for Sustainable Agriculture

Management of Biological Nitrogen Fixation for the Development of More Productive and Sustainable Agricultural Systems

Cryosols

Ecophysiology of High Salinity Tolerant Plants

Secondary Metabolites in Soil Ecology

Querdenker, Wespen und aculeate Hymenopteren

Dachdecker trifft Baumhummel – was tun?

Filialisierung bei Hornissen

Wildbienen, Bienenhotels und Kindergärten – Gehören Wildbienen zu Deutschland?

Ein Hornissennest in einem Rollladenkasten

Hilfe, eine riesige Hornisse baut bei mir