Bøker av Louis Hermann Pammel

This scientific study, first published in 1911, provides a detailed comparison of the vegetation in different types of wetland habitats in the upper Midwest. The study includes extensive data on the botany and ecology of swamp clay and sandstone areas and offers insights into the impact of human activity on these fragile ecosystems. This volume is an important resource for anyone interested in the natural history of the Midwest.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

An in-depth exploration of one of North America's most pernicious invasive species, The Russian Thistle is an essential resource for botanists, ecologists, and anyone interested in the natural history of the American West. With detailed illustrations and analysis, Pammel helps readers understand the biology, ecology, and impact of this troublesome plant on the communities it invades.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

This comprehensive guide provides detailed descriptions and illustrations of the grasses found in Iowa, making it an essential reference for botanists, ecologists, and agricultural professionals. Volume 1, Part 2 includes information on over 50 types of grasses, with detailed keys for identification and information on each species' habitat, uses, and ecological importance.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Gain a thorough understanding of the principles and practices of ecology with this comprehensive textbook. From the basic concepts of ecosystems and populations to the complex interactions of species and environments, this book covers all the major topics in the field. With clear explanations, ample illustrations, and practical examples, this book is an essential resource for students, scholars, and professionals alike.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.