Topic
Lime
About: Lime is a research topic. Over the lifetime, 22198 publications have been published within this topic receiving 214379 citations.
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Book Chapter•
18 Oct 2019
TL;DR: In this paper, the authors present the methods and equations for estimating total national anthropogenic emissions of N2O (direct and indirect) from managed soils from managed soil, and the generic equations presented here can also be used for estimating N 2O within specific land-use categories or by condition-specific variables (e.g., N additions to rice paddies) if the country can disaggregate the activity data to that level (i.e., N use activity within a specific land use).
Abstract: This section presents the methods and equations for estimating total national anthropogenic emissions of N2O (direct and indirect) from managed soils. The generic equations presented here can also be used for estimating N2O within specific land-use categories or by condition-specific variables (e.g., N additions to rice paddies) if the country can disaggregate the activity data to that level (i.e., N use activity within a specific land use).
386 citations
TL;DR: The conclusions were that whilst Fe-oxides may be used as effective in situ amendments to attenuate As in soils, their effects on other trace elements, such as Pb and Cd, require careful consideration.
380 citations
TL;DR: In this article, the influence of the mixture of polypropylene fiber and lime on the engineering properties of a clay-ey soil was investigated and analyzed through scanning electron microscopy (SEM) analysis of the specimens after shearing.
378 citations
TL;DR: In this article, a comprehensive and updated review of lime requirements for improved annual crop production on Oxisols is provided, and experimental data are provided to make this review as practical as possible for improving crop production.
Abstract: The greatest potential for expanding the world's agricultural frontier lies in the savanna regions of the tropics, which are dominated by Oxisols. Soil acidity and low native fertility, however, are major constraints for crop production on tropical Oxisols. Soil acidification is an ongoing natural process which can be enhanced by human activities or can be controlled by appropriate soil management practices. Acidity produces complex interactions of plant growth‐limiting factors involving physical, chemical, and biological properties of soil. Soil erosion and low water‐holding capacity are major physical constraints for growing crops on tropical Oxisols. Calcium, magnesium, and phosphorous deficiencies or unavailabilities and aluminum toxicity are considered major chemical constraints that limit plant growth on Oxisols. Among biological properties, activities of beneficial microorganisms are adversely affected by soil acidity, which has profound effects on the decomposition of organic matter, nutrient mineralization, and immobilization, uptake, and utilization by plants, and consequently on crop yields. Liming is a dominant and effective practice to overcome these constraints and improve crop production on acid soils. Lime is called the foundation of crop production or “workhorse” in acid soils. Lime requirement for crops grown on acid soils is determined by the quality of liming material, status of soil fertility, crop species and cultivar within species, crop management practices, and economic considerations. Soil pH, base saturation, and aluminum saturation are important acidity indices which are used as a basis for determination of liming rates for reducing plant constraints on acid soils. In addition, crop responses to lime rate are vital tools for making liming recommendations for crops grown on acid soils. The objective of this chapter is to provide a comprehensive and updated review of lime requirements for improved annual crop production on Oxisols. Experimental data are provided, especially for Brazilian Oxisols, to make this review as practical as possible for improving crop production.
375 citations
TL;DR: In this article, the optimum pH for chemical coagulation and precipitation by lime treatment was more than 9.5, which could decrease the concentration of heavy metals pertinent to the Wastewater Standard of the Ministry of Industry.
373 citations