Approximately one-third of all food produced globally goes to waste, promoting a growing demand to recycle and recover wasted nutrients using sustainable waste management technologies such as composting and anaerobic digestion. Organic end-products from composting and anaerobic digestion have low nutrient contents making agricultural utilisation challenging (economically and practically) relative to synthetic fertilisers. However, organic end-products can enhance physical and biological properties of soil that can have syngeneic effects when combined with synthetic N. This study investigated synergistic relationships between food waste-derived organic soil applied at a rate of 50 kg ha-1 total N [compost or anaerobic digestion effluent (liquid digestate (LD) or solid digestate (SD))] and two rates (50 and 100 kg ha-1 total N) of synthetic N [urea ammonium nitrate (UAN)] to produce sustainable waste-derived fertiliser products. Greenhouse gases (CO2, N2O), soil chemistry (NH4+-N, NO3-N, pH) and microbial biomass C (MBC) during 56 days of soil incubation were quantified. The application of organic soil amendments produced lower N2O emissions than UAN. LD + UAN 50 decreased cumulative N2O emissions by 23% compared to the UAN 100 despite having the same total N (100 kg ha-1) and the same available N rate. Therefore, replacing UAN for LD in farming practices has the potential to not only supply an equivalent amount of available N in the soil, but also lower N2O emissions. SD produced the highest CO2 emissions, followed by LD and compost. SD +UAN 50 increased MBC levels due to the high levels of carbon and increased labile carbon and available nitrogen due to the application of UAN. The major drawback of using SD compared to LD is that the evaporation of LD caused high ammonia volatilisation rates, reducing available N in SD. Therefore, future studies should explore strategies to reduce ammonia volatilisation of LD.

Exploring the dramatic growth and changes in the field of vermicomposting since 1988, this comprehensive review assesses the advancements made in government-funded projects in the U.S. and UK. It discusses outdoor and indoor windrows, container systems, wedge systems, and low labor-requirements. It also examines fully-automated continuous flow vermicomposting reactor systems that can process more than 1000 tons of organic wastes per reactor. The book highlights the science and biology behind the use and efficacy of vermicomposting and details the technology of the past, present, and future.

For this third volume of the series Soil Biology, internationally renowned scientists shed light on the significant roles of microbes in soil. Key topics covered include: bioerosion, humification, mineralization and soil aggregation; Interactions in the mycorrhizosphere; microbes and plant nutrient cycling; Microbes in soil surface or toxic metal polluted soils; Use of marker genes and isotopes in soil microbiology, and many more.

Here is the most comprehensive and up-to-date treatment of one of the hottest areas of chemical research. The treatment of fundamental kinetics and photochemistry will be highly useful to chemistry students and their instructors at the graduate level, as well as postdoctoral fellows entering this new, exciting, and well-funded field with a Ph.D. in a related discipline (e.g., analytical, organic, or physical chemistry, chemical physics, etc.). Chemistry of the Upper and Lower Atmosphere provides postgraduate researchers and teachers with a uniquely detailed, comprehensive, and authoritative resource. The text bridges the "gap" between the fundamental chemistry of the earth's atmosphere and "real world" examples of its application to the development of sound scientific risk assessments and associated risk management control strategies for both tropospheric and stratospheric pollutants. - Serves as a graduate textbook and "must have" reference for all atmospheric scientists - Provides more than 5000 references to the literature through the end of 1998 - Presents tables of new actinic flux data for the troposphere and stratospher (0-40km) - Summarizes kinetic and photochemical date for the troposphere and stratosphere - Features problems at the end of most chapters to enhance the book's use in teaching - Includes applications of the OZIPR box model with comprehensive chemistry for student use