By Gero Benckiser
Deals an built-in presentation of the microbial, agronomic and recycling features of soil faunal potentials, emphasizing agricultural ecosystems and furnishing tools for modelling nutrients webs. The textual content covers morphology, replica, abundances, simple specifications, festival, predation, parasitism, nutrient biking and phytopathological interactions, soil physics and agricultural administration, plus tips on how to quantify soil faunal teams.
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Additional info for Fauna in soil ecosystems: recycling processes, nutrient fluxes, and agricultural production
Example text
Page 25 and promote good tilth, good moisture retention in droughty areas, and, paradoxically, often good drainage in wet areas. , 1991). The N- as well as all other nutrient cycles in soils are highly dependent on C-transformation and biomass (Figure 5) (Boyle and Paul, 1989a; Isermann, 1993; Benckiser, 1994; Bohlen and Edwards, 1995). With recommended sewage sludge rates of 5 tons per 3 years (German Sewage Sludge Regulations of 1992) more than 60 kg N ha-1 is annually applied to soils (Table 1) (Boyle and Paul, 1989a).
White, and William E. Muir Agrochemicals from Natural Products, edited by C. R. A. Godfrey Seed Development and Germination, edited by Jaime Kigel and Gad Galili Nitrogen Fertilization in the Environment, edited by Peter Edward Bacon Phytohormones in Soils: Microbial Production and Function, W. T. , and Muhammad Arshad Handbook of Weed Management Systems, edited by Albert E. Smith Soil Sampling, Preparation, and Analysis, Kim H. Tan Soil Erosion, Conservation, and Rehabilitation, edited by Menachem Agassi Plant Roots: The Hidden Half, Second Edition, Revised and Expanded, edited by Yoav Waisel, Amram Eshel, and Uzi Kafkafi Photoassimilate Distribution in Plants and Crops: Source-Sink Relationships, edited by Eli Zamski and Arthur A.
Animal wastes are distinguished as raw, fermented, fluid, or solid slurries with gaseous losses of about 10% during storage. German cattle produce ca. 2 m3 ha-1 farmland. 2 m3 ha-1 (hens) (Vetter and Steffens, 1986). B. Macronutrients The amounts of nitrogen and phosphorus returned to soils by crop residues are summarized in Table 1. Depending on the crop, the nutrient inputs vary considerably. Similarly, the mean nutrient contents of German sewage sludges and biocomposts as percentage of dry matter, shown in Tables 2 and 3, exhibit high annual and regional variability (Unken, 1987; Poletschny, 1994a).