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Humus --- Humification --- Range management --- Soil management --- United States.

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Agriculture --- Animal culture --- Agronomy --- Elevage --- Agronomie --- Periodicals. --- Periodicals --- Périodiques --- Agriculture. --- Agronomy. --- Animal culture. --- Brazil --- agrarian sciences --- animal sciences --- agronomic sciences --- sustainable rural development --- forest science --- Animal husbandry --- Husbandry, Animal --- Zoology, Economic --- Crops --- Soil management --- Farming --- Husbandry --- Industrial arts --- Life sciences --- Food supply --- Land use, Rural

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The world’s population is expected to reach 8 billion by 2025 and most of this growth in population will occur in developing countries. To feed the world with such a marked increase in population, a great improvement in food production must be achieved particularly in these countries. To meet this challenge, present agricultural productivity must be increased on the cultivated land. However, in many developing countries, particularly in Africa, reduced soil fertility caused by continuous cropping with low nutrient input and the resultant nutrient mining of soils is a major threat both to food production and to ecosystem viability. As a result of declining soil fertility, together with increasing population pressure, expansion of crop production to marginal lands and forested areas contribute to the destruction of natural ecosystems. Food production is not only a quantitative challenge. Improving the nutrient status of plants provides a further valuable means of enhancing food quality and is of extreme benefit to the health of both plants and humans. There are several excellent examples showing that plants with optimum nutrient status are better adapted to biotic and abiotic stress factors. Because of population pressures, many global food systems are not currently providing enough micronutrients to ensure adequate micronutrient intakes in the human diet. This has resulted in an increasing prevalence of micronutrient deficiencies that now afflicts over three billion people worldwide.

Plants --- Nutrition --- Pflanzenernahrung --- Lebensmittelversorgung --- Nachhaltigkeit --- Kongress --- Plant physiology. --- Nutrition. --- Agriculture. --- Soil conservation. --- Plant Physiology. --- Soil Science & Conservation. --- Soil science. --- Conservation of soil --- Erosion control, Soil --- Soil erosion --- Soil erosion control --- Soils --- Agricultural conservation --- Soil management --- Pedology (Soil science) --- Agriculture --- Earth sciences --- Farming --- Husbandry --- Industrial arts --- Life sciences --- Food supply --- Land use, Rural --- Botany --- Physiology --- Control --- Prevention --- Conservation --- Plant nutrition --- Plant physiology

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This is the 5th edition of a well-established book Principles of Plant Nutrition which was first published in 1978. The same format is maintained as in previous editions with the primary aim of the authors to consider major processes in soils and plants that are of relevance to plant nutrition.This new edition gives an up-to-date account of the scientific advances of the subject by making reference to about 2000 publications. An outstanding feature of the book, which distinguishes it from others, is its wide approach encompassing not only basic nutrition and physiology, but also practical aspects of plant nutrition involving fertilizer usage and crop production of direct importance to human nutrition. Recognizing the international readership of the book, the authors, as in previous editions, have attempted to write in a clear concise style of English for the benefit of the many readers for whom English is not their mother tongue. The book will be of use to undergraduates and postgraduates in Agriculture, Horticulture, Forestry and Ecology as well as those researching in Plant Nutrition.

Plants --- Nutrition. --- Botany --- Earth & Environmental Sciences --- Plant Physiology --- Plant physiology. --- Soil science. --- Soil conservation. --- Ecology . --- Plant Physiology. --- Soil Science & Conservation. --- Ecology. --- Balance of nature --- Biology --- Bionomics --- Ecological processes --- Ecological science --- Ecological sciences --- Environment --- Environmental biology --- Oecology --- Environmental sciences --- Population biology --- Conservation of soil --- Erosion control, Soil --- Soil erosion --- Soil erosion control --- Soils --- Agricultural conservation --- Soil management --- Pedology (Soil science) --- Agriculture --- Earth sciences --- Physiology --- Ecology --- Control --- Prevention --- Conservation --- Plants - Nutrition.

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Concerns over environmental and human health impacts of conventional weed management practices, herbicide resistance in weeds, and rising costs of crop production and protection have led agricultural producers and scientists in many countries to seek strategies that take greater advantage of ecological processes and thereby allow a reduction in herbicide use. This book provides principles and practices for ecologically based weed management in a wide range of temperate and tropical farming systems. After examining weed life histories and processes determining the assembly of weed communities, the authors describe how tillage and cultivation practices, manipulations of soil conditions, competitive cultivars, crop diversification, grazing livestock, arthropod and microbial biocontrol agents, and other factors can be used to reduce weed germination, growth, competitive ability, reproduction and dispersal. Special attention is given to the evolutionary challenges that weeds pose and the roles that farmers can play in the development of new weed-management strategies.

Weeds --- Agricultural ecology. --- Tillage. --- Agricultural systems. --- Farming systems --- Systems, Agricultural --- Systems, Farming --- Agricultural geography --- Farm management --- Cultivation of soils --- Soil cultivation --- Soil tillage --- Tilling --- Agricultural systems --- Agriculture --- Soil management --- No-tillage --- Agroecology --- Ecology --- Permaculture --- Pest plants --- Weed plants --- Weedy plants --- Plant pests (Plants) --- Agricultural pests --- Botany, Economic --- Plants --- Bio-control of weeds --- Biocontrol of weeds --- Biological control of weeds --- Weed biocontrol --- Weed biological control --- Biological control. --- Ecology. --- Environmental aspects --- Control --- noxious plants --- pest control --- Integrated control --- Biological control --- Plant competition --- Tropical zones --- Temperate zones --- world