BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. Perspectives and Challenges in the Future Use of Plant Nutrients in Tilled and Mixed Agricultural Systems Author(s): Lars Bergström and Keith W. T. Goulding Source: AMBIO: A Journal of the Human Environment, 34(4):283-287. Published By: Royal Swedish Academy of Sciences URL: http://www.bioone.org/doi/full/10.1579/0044-7447%282005%29034%5B0283%3APACTFU %5D2.0.CO%3B2 BioOne (www.bioone.org ) is a nonprofit, online aggregation of core research in the biological, ecological, and environmental sciences. BioOne provides a sustainable online platform for over 170 journals and books published by nonprofit societies, associations, museums, institutions, and presses. Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance of BioOne’s Terms of Use, available at www.bioone.org/page/terms_of_use . Usage of BioOne content is strictly limited to personal, educational, and non-commercial use. Commercial inquiries or rights and permissions requests should be directed to the individual publisher as copyright holder.