Campbell, S.: The Gardener’s Guide to Composting, revised edition, Storey Publishing, Pownal, VT, 1990. A concise presentation of all you need to know about composting.

Campbell, S.: The Mulch Book: A Complete Guide for Gardeners, Storey Publishing, Pownal, VT, 1991. A concise presentation of all you need to know about mulching.

Epstein, E.: Mineral Nutrition of Plants: Principles and Perspectives. John Wiley & Sons, New York, 1972. A thorough coverage of the whole field of mineral nutrition, well-illustrated and written by one of the leading students of the subject.

Gresshoff, P. (editor): Molecular Biology of Symbiotic Nitrogen Fixation, CRC Press, Boca Raton, FL, 1990. A multiauthored book summarizing current knowledge, which is undergoing rapid expansion.

Lewis, O.: Plants and Nitrogen, Studies in Biology No. 166, Edward Arnold Publishers, London, 1986. A concise introduction to the association that exists between plants and nitrogen. Ecological, physiological, and biochemical aspects are combined to provide the reader with an overall view of nitrogen in the biosphere.

Lipske, M.: "Forget Hollywood: These Bloodthirsty Beauties Are For Real," Smithsonian, vol. 23, pages 49–59, 1992. Lively description of carnivorous plants and the biological communities that live and function within and on their leaves.

Marschner, H.: Mineral Nutrition of Higher Plants, Academic Press, New York, 1986. A comprehensive account of mineral nutrition in plants.

Mengel, K. and E.A. Kirkby: Principles of Plant Nutrition, 3rd ed., International Potash Institute, Worblaufen-Bern, Switzerland, 1982. A textbook for students interested in plant science and crop production; integrates soil science, plant physiology, and biochemistry.