Plant growing

Xem 1-20 trên 133 kết quả Plant growing
  • (BQ) Ebook Life science: How Plants Grow and Change provides about what do plants need to live? What are some ways that seeds are moved? What is a spore? Some plants have fi brous roots, while others have taproots; describe how these roots are different, and how they help the plant get what it needs.

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  • Microbial biomass formation on root surfaces can be measured in plants growing in solution with or without an inert solid support. Carbon flow to the biomass can be measured by growing plants in solution or soil on a continuous source of 14C02 and the expected biomass formation predicted. The lack of correlation between measured and predicted biomass can be explained by oligotrophic growth of the micro-organisms.

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  • Ebook Plants and the environment provides about plants need the environment; plants use land and water; plants get food and water from the soil; their roots grow in the soil; the roots soak up water and nutrients; plants use animals and other plants;...

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  • The great depth and high fertility of the soils of arid and semiarid regions have made possible the profitable production of agricultural plants under a rainfall very much lower than that of humid regions. To make the principles of this system fully understood, it is necessary to review briefly our knowledge of the root systems of plants growing under arid conditions.

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  • Thermal power plants are one of the most important process industries for engineering professionals. Over the past decades, the power sector is facing a number of critical issues; however, the most fundamental challenge is meeting the growing power demand in sustainable and efficient ways. Practicing power plant engineers not only look after operation and maintenance of the plant, but, also look after range of activities including research and development, starting from power generation to environmental aspects of power plants.

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  • Covering all aspects of botany, ethnology, pharmacology, toxicology, pharmacy, and medicine, this authoritative volume provides comprehensive coverage, presenting all important classes of natural products found in Asia and the Pacific, classified by their mode of action. With illustrations and photographs, each chapter includes figures of plants, concepts, and mechanisms of action. The author also presents cutting-edge research and recent developments in the field.

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  • The wide geographical distribution of the rice plant ( Oryza sativa L.) and its long history of cultivation in Asian countries have led to the development of a great diversity of varietal types. Similarly, workers in various rice-growing countries use different terms to designate identical morphological and physiological characters, agronomic traits, gene symbols, and cultural practices. Whereas varietal diversity in germ plasm is desired in rice breeding, variations in nomenclature hinder scientific communication among the workers.

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  • Evidence grows daily of the rapid changes in climate due to human activities and their impact on plants and animals. Plant function is inextricably linked to climate and atmospheric carbon dioxide concentration. On the shortest and smallest scales the climate affects the plant’s immediate environment and thus directly influences physiological processes. On longer and larger time and space scales climate influ- ences species distribution and community composition and determines what crops can be viably produced in managed agricultural, horticultural and forestry ecosys- tems.

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  • Thermal power plants are one of the most important process industries for engineering professionals. Over the past few decades, the power sector has been facing a number of critical issues. However, the most fundamental challenge is meeting the growing power demand in sustainable and efficient ways.

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  • To meet the growing demand for safe vegetables, the assessment of understanding and awareness of risk producers of plant protection drugs increasingly are concerned, so that, with appropriate measures of hazards and reduce harmful levels of chemicals in the product. Therefore, this study was to assess the awareness of local people about the risks of plant protection drugs

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  • Invasive alien plants are harmful non-native plant species whose introduction or spread threatens the environment, the economy, and society, including human health. They can be introduced into Canada from other countries or continents, or from one region of Canada to another. The current threats posed by invasive alien plants are real and growing. Why are invasive alien plants a problem? The economic cost of invasive alien plants to Canadians is enormous. Weeds in crops and pastures alone cost an estimated $2.2 billion annually.

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  • IN CHAPTER 5 WE DISCUSSED plants’ requirements for mineral nutrients and light in order to grow and complete their life cycle. Because living organisms interact with one another and their environment, mineral nutrients cycle through the biosphere. These cycles involve complex interactions, and each cycle is critical in its own right. Because the amount of matter in the biosphere remains constant, energy must be supplied to keep the cycles operational. Otherwise increasing entropy dictates that the flow of matter would ultimately stop.

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  • In the preceding chapter advice is given that applies to groups or classes of plants, and many lists are inserted to guide the grower in his choice or at least to suggest to him the kinds of things that may be grown for certain purposes or conditions. It now remains to give instructions on the growing of particular kinds or species of plants. It is impossible to include instructions on any great number of plants in a book like this. It is assumed that the user of this book already knows how to grow the familiar or easily handled...

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  • HAVE YOU EVER LIFTED UP A BOARD that has been lying on a lawn for a few weeks and noticed that the grass growing underneath was much paler and spindlier than the surrounding grass? The reason this happens is that the board is opaque, keeping the underlying grass in darkness. Seedlings grown in the dark have a pale, unusually tall and spindly appearance. This form of growth, known as etiolated growth, is dramatically different from the stockier, green appearance of seedlings grown in the light (Figure 17.1). Given the key role of photosynthesis in plant metabolism, one might be tempted...

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  • DURING THE NINETEENTH CENTURY, when coal gas was used for street illumination, it was observed that trees in the vicinity of streetlamps defoliated more extensively than other trees. Eventually it became apparent that coal gas and air pollutants affect plant growth and development, and ethylene was identified as the active component of coal gas. In 1901, Dimitry Neljubov, a graduate student at the Botanical Institute of St.

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  • There is a knack in the successful handling of plants that it is impossible to describe in print. All persons can improve their practice through diligent reading of useful gardening literature, but no amount of reading and advice will make a good gardener of a person who does not love to dig in a garden or who does not have a care for plants just because they are plants. To grow a plant well, one must learn its natural habits. Some persons learn this as if by intuition, acquiring the knowledge from close discrimination of the behavior of the...

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  • MOST OF US are familiar with the observation that house plants placed near a window have branches that grow toward the incoming light. This response, called phototropism, is an example of how plants alter their growth patterns in response to the direction of incident radiation. This response to light is intrinsically different from light trapping by photosynthesis. In photosynthesis, plants harness light and convert it into chemical energy (see Chapters 7 and 8). In contrast, phototropism is an example of the use of light as an environmental signal.

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  • After studying this chapter you will be able to understand: Mutualistic relationships between plant roots and the bacteria and fungi that grow in the rhizosphere help plants acquire important nutrients; nonmutualistic nutritional adaptations enable plant survival in adverse habitats.

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  • Chapter 39 - Plant responses to internal and external signals. This chapter presents the following content: Signal transduction pathways link internal and environmental signals to cellular responses, research on how plants grow toward light led to the discovery of plant hormones.

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  • Constructed wetlands are known widely by their characteristic properties like utilization of natural processes, simple and easy of construction, operation and maintain as well. The constructed subsurface flow wetland is designed as a tank with an impervious boundary to prevent seepage and contain a suitable porous media in which emergent plants grow. The water remains below the surface of the gravel/stone/rock media. Soil in constructed subsurface flow wetland absorbs and stores organic matter several years.

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