Relation to Available Nitrogen

Ebook "Nutrient use efficiency in plants: Concepts and approaches" presents a broad overview of topics related to improvement of nutrient use efficiency of crops. Nutrient use efficiency (NUE) is a measure of how well plants use the available mineral nutrients. It can be defined as yield (biomass) per unit input (fertilizer, nutrient content). NUE is a complex trait: it depends on the ability to take up the nutrients from the soil, but also on transport, storage, mobilization, usage within the plant, and even on the environment.

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These in view the present investigation was undertaken for assessing the residual effect of INM on available nutrients in soil.

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A survey study was conducted in one hundred and fifty pomegranate orchards situated in seven villages of Bagalkot district, Karnataka viz., Junnur, Seemikeri, Govinakoppa, Kaladagi, Sokanadagi, Chikkasamshi and Hiresamshi to assess the soil and plant major mineral nutrient concentration and its relation with pomegranate yield.

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A detailed soil survey was undertaken in central state farm Jetsar, Sri Ganganagar, Rajasthan, India representing the arid climate with the aim of to assess the status and potential of land resources for the suitability and production potential of soils for chickpea. The area of the farm has been divided into three major landforms viz., sand dunes, reclaimed sand dunes and aeofluvial flood plain. Based on the variation in physiography and landforms, eight soil pedons were identified in the farm.

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Climate change influences composite set of measurable physical, chemical and biological soil properties attributes which relate to functional soil processes. Climate change impacts soil chemical, physical and biological functions through a range of predicted global change drivers such as rising atmospheric carbon dioxide (CO2) levels, elevated temperature, altered precipitation (rainfall) and atmospheric nitrogen (N) deposition (French et al., 2009).

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Nitrogen (N) and sulphur (S), being essential macronutrients, have important roles in microalgae metabolism. Effects of N- or S -shortage were investigated in the green microalgae Chlorella s o-rokiniana subjected to 24 h of starvation, by measuring the glutamine synthetase (GS) and O-ace - tylserine(thiol)lyase (OASTL) activities, p roteins and amino acids levels. To test possible met a-bolic impact related to carbon (C) metabolism in response to N- or S -deprivation, starch and total C, N and S contents were also determin ed. The growth of C.

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European chestnut is the most important cash crop in the highlands of NE Portugal. However, limited data on cropping technique are available to help farmers make decisions. This work is motivated by the lack of data related to chestnut response to fertilizer application.

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Disagreements involving environmental priorities and strategic approaches, and balancing the relative roles of compliance assistance with enforcement, contribute to the complexity and friction that come with enforcing national pollution control laws. Other contributing factors include the increasing number of statutory and related regulatory pollution control requirements (some with conflicting mandates) and the adequacy of the resources available for their implementation.

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