Jordbrugsvidenskab

Maize is one of the most generally grown cereal crops at global level, followed by wheat and rice. Maize is the major crop in China both in terms of yield and acreage. In 2012, worldwide maize production was about 840 million tons. Maize has long been a staple food of most of the global population (particularly in South America and Africa) and a key nutrient resource for animal feed and for food industrial materials. Maize belts vary from the latitude 58° north to the latitude 40° south, and maize ripens every month of the year. Abiotic and biotic stresses are common in maize belts worldwide. Abiotic stresses (chiefly drought, salinity, and extreme temperatures), together with biotic stresses (primarily fungi, viruses, and pests), negatively affect maize growth, development, production and productivity. In the recent past, intense droughts, waterlogging, and extreme temperatures have relentlessly affected maize growth and yield. In China, 60% of the maize planting area is prone to drought, and the resultant yield loss is 20%¿30% per year; in India, 25%¿30% of the maize yield is lost as a result of waterlogging each year. The biotic stresses on maize are chiefly pathogens (fungal, bacterial, and viral), and the consequential syndromes, like ear/stalk rot, rough dwarf disease, and northern leaf blight, are widespread and result in grave damage. Roughly 10% of the global maize yield is lost each year as a result of biotic stresses. For example, the European corn borer [ECB, Ostrinianubilalis (Hübner)] causes yield losses of up to 2000 million dollars annually in the USA alone in the northern regions of China, the maize yield loss reaches 50% during years when maize badly affected by northern leaf blight. In addition, abiotic and biotic stresses time and again are present at the same time and rigorously influence maize production. To fulfill requirements of each maize-growing situation and to tackle the above mentions stresses in an effective way sensibly designed multidisciplinary strategy for developing suitable varieties for each of these stresses has been attempted during the last decade. Genomics is a field of supreme significance for elucidating the genetic architecture of complex quantitative traits and characterizing germplasm collections to achieve precise and specific manipulation of desirable alleles/genes. Advances in genotyping technologies and high throughput phenomics approaches have resulted in accelerated crop improvement like genomic selection, speed breeding, particularly in maize. Molecular breeding tools like collaborating all omics, has led to the development of maize genotypes having higher yields, improved quality and resilience to biotic and abiotic stresses. Through this book, we bring into one volume the various important aspects of maize improvement and the recent technological advances in development of maize genotypes with high yield, high quality and resilience to biotic and abiotic stresses

This contributed volume gives a state-of-the-art overview of microplastics and nanoplastics (MPs and NPs) in soils and their relationship with growing plants. Through chapters contributed by a wide variety of researchers, the book offers readers an understanding of MP and NP adsorption, uptake, and effects, as well as implications for trophic transmission, food safety, and security. Cutting-edge topics such as trophic transfer and remediation of MPs and NPs in soil samples are also addressed. The book begins with a primer on terrestrial MPs and NPs, their effects on terrestrial plants, and how these contaminants affect human populations. From there, the volume is split into four sections which address both problems caused by MPs and NPs in soil and potential remediation solutions. The first section deals with the mechanics of how MPs and NPs pollute soils and how toxic chemicals affect the soil profile and its flora, fauna and microbes. The second section of the book discusses trophic transfer of MPs and NPs from roots to shoot, shoot to leaves, and then to fruits. The third section details the threats to humans that are present as a result of MPs and NPs in soils. The fourth and last section gives covers bioremediation techniques that can be employed in order to reclaim polluted soils.

The book deals with the most striking landscapes and landforms of Nigeria. Attention is paid to the diversity of geomorphic features found in the country, from the coast to the extreme north, approached geographically at the national, regional and local scales, with a view to highlight the combined influence of geological, climatic, biotic and anthropogenic influences, as well as geoheritage potentials. The topics and sites described range from the mainly depositional coastal lagoons and inlets, the most prominent of which is the oil rich Niger Delta, characterized by the mangrove and rain forest, both of which have been seriously modified by human impact; through the coastal lowlands and associated hill country, with derived, deciduous and dry forest vegetation; the very prominent Niger/Benue Trough and associated features; the savanna-semi desert covered high plains of the north and the Chad Basin, each of which features spectacular landscapes and landforms, including human-made forms such as cities and cityscapes. The book provides the readers with the opportunity to explore the variety of Nigerian landscapes and landforms through informative texts illustrated with color maps and photos: it will be relevant to scientists/scholars as well as others interested in the geology, physical geography, geomorphology, landscape, tourism and other geoheritage-related information about the country.

In the context of rising adverse effects of climate change on agriculture, there is a need for advanced methods and practices to manage soils for production of food and energy. This book presents the latest advances in microbial processes that control plant growth, with focus on genomic tools, microbial interactions with the plant and soils habitats, mobilization of plant nutrients, agricultural waste management, biodegradation, bioremediation, carbon sequestration, land reclamation, plant growth promotion, suppression of plant pathogens, induced systemic resistance and tolerance against biotic and abiotic stresses.

Soil Science - Emerging Technologies, Global Perspectives and Applications describes recent research that illustrates the universal importance of understanding soil and soil¿s relationship to environmental stewardship and food security. Research supporting emerging technologies provides abilities to discern key soil attributes that influence soil behavior and development, understand soil biology to create sustainable land management, and sequester carbon to partially negate climate change. Soil science is an interdisciplinary field of inquiry that must consider resource allocation and social needs to foster a culture that protects and secures not only soil health but also water and air quality. Chapters in this book reflect the diversity of modern thinking within the discipline of soil science, but collectively illustrate that global sustainability of food, the environment, and biological diversity are critical to future generations.

This edited volume deals with the understanding of the issues concerned with the pollution caused by toxic elements and heavy metals and their impacts on the different agro-ecosystems as well as the techniques involved in sustainable remediation and amelioration of polluted soils. Furthermore, the book is a detailed comprehensive account for the treatment technologies from unsustainable to sustainable which includes chapters prepared by professionals with expertise in environmental microbiology, biotechnology, bioremediation, and environmental engineering.It focuses on the characterization, reclamation, bioremediation, and phytoremediation of polluted soils. The research presented also highlights some of the significantly important plant and microbial species involved in remediation, the physiology, biochemistry, and the mechanisms of remediation by various plants and microbes, and suggestions for future improvement of bioremediation technology. It offers insights into the current focus and recent advances in bioremediation and green technology applications for sustainable soil management.

This book focuses on soil and water conservation at global scale. It is a serious environmental problem that will threaten the socio-economic well-being of the majority of global population in future. The book examines the current situation of land degradation in multiple regions of the world and offers alternative approaches to solve the problems through sharing advanced technologies and lessons learned. It provides comprehensive assessment on characteristics, level and effect of degradation in different regions. It's a highly informative reference both for researchers and graduate students.

Long overdue, this collection of timeless Acres U.S.A. interviews includes 25 diverse voices who sparked a movement still rapidly growing today around the world: organic, eco-agriculture. In 1976, when the first interview in this book was recorded, only a few lone voices in the agriculture industry could be heard teaching about soil health, holistic land and animal management, and this wild idea of organic farming. More than 45 years later, when the last interview in this book was recorded, the organic food industry had rocketed into the billions of dollars and a new progression of regenerative agriculture was starting to sweep the world. These pages include 25 free thinkers whose ideas and actions were fundamental in this continued evolution in favor of soil health and human health.You'll read interviews that include: William A. Albrecht explaining eco-agriculture in 1976;Charles Walters' timeless talk on change in farming;Wendell Berry's warning about fear after 9/11;Elaine Ingham's groundbreaking interview on soil biology;Gabe Brown's launch of the regenerative ag movement;And more, including Dr. Vandana Shiva, Eliot Coleman, Jerry Brunetti, Bill Mollison, Leah Penniman, and Gary Zimmer!

Exported Experts, Latin American Farmers and Negotiating ModernityThe Making of Modern Agriculture addresses how an American philanthropic agency - the American International Association for Economic and Social Development (AIA) - influenced the course of agricultural development in Latin America during the Cold War. Operating from 1946 to 1968, the AIA was an endeavour designed by the multimillionaire and politician Nelson Aldrich Rockefeller (1908-1979) to maintain the United States' influence on foreign policy through Latin America. With a major presence in Venezuela and Brazil, the AIA also conducted rural development programmes in Chile, Costa Rica, as well as studies of Trinidad & Tobago, Paraguay, Peru, China and India. With an unwavering faith in the principles of science and technology, the AIA exported experts who began their careers in reformist organisations during the New Deal and later expected to accommodate similar programmes in Latin America during and after WWII.By exploring previously unpublished primary sources, The Making of Modern Agriculture demonstrates the role of Latin American elites and governments in adapting and rejecting programmes of US origin. Based on numerous examples, the book demonstrates how the encounters and clashes between foreign experts, governments, and local technicians with affected populations resulted not only in the adaptation of exogenous projects, but, in a certain way, forced the AIA to rethink its strategies and formulate new models to be adopted later in other Southern Hemisphere countries. The book also demonstrates, from an approach mingling history of science, environment and international relations, how the encounters between experts, politicians, and rural populations rendered the notions of development and modernisation even more polysemic.Da Silva illustrates how, in addition to the notable Ford, Rockefeller and Carnegie foundations, agencies less known to academics played a differentiated and fundamental role in the geopolitics of Latin America and the United States. As the book demonstrates, the AIA is one of the fundamental references for the establishment of Harry Truman's Point Four and, among other legacies, influenced the formation of the largest agricultural extension service outside the United States, in Brazil. Finally, it contributes a historical perspective to current debates about how Latin America has become a paradoxical agricultural power, producing commodities for global markets even as environmental injustice is dramatically advancing.

Plants, being sessile and autotrophic in nature, must cope with challenging environmental aberrations and therefore have evolved various responsive or defensive mechanisms including stress sensing mechanisms, antioxidant system, signaling pathways, secondary metabolites biosynthesis, and other defensive pathways among which accumulation of osmolytes or osmo-protectants is an important phenomenon. Osmolytes with organic chemical nature termed as compatible solutes are highly soluble compounds with no net charge at physiological pH and nontoxic at higher concentrations to plant cells. Compatible solutes in plants involve compounds like proline, glycine betaine, polyamines, trehalose, raffinose family oligosaccharides, fructans, gamma aminobutyric acid (GABA), and sugar alcohols playing structural, physiological, biochemical, and signaling roles during normal plant growth and development. The current and sustaining problems of climate change and increasing world population has challenged global food security. To feed more than 9 billion, the estimated population by 2050, the yield of major crops needs to be increased 1.1-1.3% per year, which is mainly restricted by the yield ceiling. A major factor limiting the crop yield is the changing global environmental conditions which includes drought, salinity and extreme temperatures  and are responsible for a reduction of crop yield in almost all the crop plants. This condition may worsen with a decrease in agricultural land or the loss of potential crop yields by 70%. Therefore, it is a challenging task for agricultural scientists to develop tolerant/resistant varieties against abiotic stresses. The development of stress tolerant plant varieties through conventional breeding is very slow due to complex multigene traits. Engineering compatible solutes biosynthesis by deciphering the mechanism behind the abiotic tolerance or accumulation in plants cell is a potential emerging strategy to mitigate adverse effects of abiotic stresses and increase global crop production. However, detailed information on compatible solutes, including their sensing/signaling, biosynthesis, regulatory components, underlying biochemical mechanisms, crosstalk with other signaling pathways, and transgenic development have not been compiled into a single resource. Our book intends to fill this unmet need, with insight from recent advances in compatible solutes research on agriculturally important crop plants.

This book addresses the impact of soil and water quality on food production, and explores soil and water conservation measures to be applied at farm level for agricultural sustainability. Divided into 8 chapters, the book covers topics such as soil properties responsible for soil loss, the impact of climate change, water and biological factors on soil chemistry, the effect of soil on the quality of water including sustaining aquaculture productivity and environment of wetlands, soil and water qualities necessary for irrigation, management of soil organic carbon, and the importance of soil moisture conservation including agroforestry for food production. Particular attention is given to the management of soil organic carbon in sustainable crop cultivation as well as reducing soil erosion and nutrient loss from soil from cultivated lands. The book concludes with a chapter that integrates soil and water conservation with sustainable food production and food safety.

This contributed volume compiles the latest improvements in the field of biotechnology. It focuses on topics that comprises industrial, environment, agricultural and medical related issues to technology and biological studies and exhibits the correlation between the biological world and the dependence of humans on it. The book is organized into five parts covering the role of biotechnology in industrial products, environmental remediation, agriculture and pharmacological agents. Ranging from micro-scale studies to macro, it covers a huge domain of agricultural biotechnology and focuses on important commercial crops (e.g. cacao and coffee), arbuscular mycorrhizal fungi, flow and distribution of phosphorus in agricultural soils in the Latin American region. Overall, the book portrays the importance of modern biotechnology and its role in solving the problems in modern day life. The book is a ready reference for practicing students, researchers of environmental engineering, chemical engineering, agricultural engineering, and other allied fields likewise.

This book highlights the impact of climate change on the soil microbiome and its subsequent effects on plant health, soil-plant dynamics, and the ecosphere. It also discusses emerging ideas to counteract these effects, e.g., through agricultural applications of functional microbes, to ensure a sustainable ecosystem.Climate change is altering the soil microbiome distributions and thus the interactions in microbiome and plantsoil microorganism. Improvement of our understanding of microbe-microbe and plant-microbe interaction under changing climatic conditions is essential, because the overall impact of these interactions under varying adverse environmental conditions is lacking. This book has been designed to understand the impact of climate change, i.e., mainly salt and drought stress, on the soil microbiome and its impact on plant, yield, and the ecosphere.The book is organized into four parts: The first part reviews the impact of climate change on the diversity and richness of the soil microbiome. The second part addresses effects of climate change on plant health. The third part discusses effects on soil-plant dynamics and functionality, e.g., soil productivity. The final part deals with the effects of climate change on ecosystem functioning and also discusses potential solutions.The book will appeal to students and researchers working in the area of soil science, agriculture, molecular biology, plant physiology, and biotechnology. 

Much of the earth's population is dependent on agriculture as it provides food for their sustenance. Successful crop production depends to a considerable extent on land and climate. Soil is the main component of land and a fertile soil is essential for crop growth. However, soil fertility declines over the years mainly due to land degradation.  Hence, implementing appropriate measures to control land degradation is important. It is the responsibility of the farmers and the governments to take action to control land degradation. Agricultural extension officers are involved in making farmers aware of land degradation and control measures. Planners and policy makers  need scientific assessments on land degradation and its implications so that they could advice the relevant authorities who prepare the national programs and budgets. This book highlights issues related to land degradation, the causal factors and methods of control. The audience is agricultural practitioners and planners as well as students of agriculture. Environmentalists would also benefit by understanding the main issues related to land degradation discussed.