Written by international authorities in agronomy, Volume 63 contains five comprehensive reviews covering key contemporary topics on crop and soil sciences. As always, the topics are varied and exemplary of the array of subject matter covered by this long-running serial. With this latest volume, Advances in Agronomy continues to be recognized as a leading reference and as a first-rate source of the latest research in agronomy, crop science, and soil science.* articles on:* Applications of fractals to soil studies* The response of cool season grain legumes to soil abiotic stress* Kura Clover* Ultisols* Formation mechanisms of complex organic structures in soil habitats