Acid Subsoil
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Modern High-Yielding Maize, Wheat and Soybean Cultivars in Response to Gypsum and Lime Application on No-Till Oxisol
ABSTRACT Modern maize, wheat, and soybean cultivars are usually characterized by a short cycle, high shoot-root ratio, and high responsiveness to nutrient input. Continuous no-tillage management (NTS) frequently leads to a steep gradient in soil chemical quality with depth, thus decreasing yield under conditions of acid subsoil and water stress. This study a
Rev. Bras. Ciênc. Solo. Publicado em: 09/11/2017
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2. Gesso agrícola na produção de milho e soja em solo de alta fertilidade e baixa acidez em subsuperfície em plantio direto
There are doubts about the conditions in which a favorable effect of the application of gypsum on the yield of grain crops can be expected. In order to evaluate the influence of gypsum application in the soil chemical attributes, in mineral nutrition of maize (Zea mays L.) and soybean (Glycine max L. Merrill) yield in no-till system, an experiment was carrie
Publicado em: 2009
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3. ESTUDO LABORATORIAL DE MISTURAS DE FOSFOGESSO, SOLO TROPICAL E CAL PARA FINS DE PAVIMENTAÇÃO / Laboratory study of mixtures of gypsum, lime and tropical soil for paviment
The phosphogypsum, subproduct of the manufacture of the phosphoric acid, became the objective of studies, due that it requires the availability of large areas to be stored. The disposal this waste increases the cost of generating company and can even cause a series of environmental problems. In this context, It has been arisen the interest to study the appli
Publicado em: 2009
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4. Laboratory study of mixtures of gypsum, lime and tropical soil for paviment / ESTUDO LABORATORIAL DE MISTURAS DE FOSFOGESSO, SOLO TROPICAL E CAL PARA FINS DE PAVIMENTAÇÃO
The phosphogypsum, subproduct of the manufacture of the phosphoric acid, became the objective of studies, due that it requires the availability of large areas to be stored. The disposal this waste increases the cost of generating company and can even cause a series of environmental problems. In this context, It has been arisen the interest to study the appli
Publicado em: 2009
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5. CHANGES IN CHEMICAL SOIL ATTRIBUTES AND NIAGARA ROSADA GRAPE RESPONSE TO GYPSUM APPLICATION / ALTERAÇÕES QUÍMICAS DO SOLO E RESPOSTA DA VIDEIRA NIAGARA ROSADA À APLICAÇÃO DE GESSO AGRÍCOLA PONTA GROSSA - PR
Gypsum applied on the soil surface reduces subsoil Al3+ toxicity and increases the Ca2+ and S-SO42- levels, promoting better development of plant roots. Gains in productivity has observed with the use of gypsum in annual and perennial crops, but lacking studies regarding to gypsum application on grapevines. The aim of this study was to evaluate the effect of
Publicado em: 2008
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6. Uso de resíduos vegetais em solos ácidos sob sistema de plantio direto
The Brazilian soils are characterized by low natural fertility, where the main chemical limitations are high acidity and low basic exchangeable cation saturation that can affect the majority of cash crop productions. Liming is the principal practice to reduce soil acidity and to increase basic cations in these soils with high pH-dependent cation exchangeable
Publicado em: 2007
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7. Overexpression of Malate Dehydrogenase in Transgenic Alfalfa Enhances Organic Acid Synthesis and Confers Tolerance to Aluminum1
Al toxicity is a severe impediment to production of many crops in acid soil. Toxicity can be reduced through lime application to raise soil pH, however this amendment does not remedy subsoil acidity, and liming may not always be practical or cost-effective. Addition of organic acids to plant nutrient solutions alleviates phytotoxic Al effects, presumably by
American Society of Plant Physiologists.
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8. Distribution of Protozoa in Subsurface Sediments of a Pristine Groundwater Study Site in Oklahoma
Sediment core samples were obtained at a groundwater study site in Oklahoma in January and June 1985. Most-probable-number estimates showed that protozoan numbers declined steeply with depth in subsoil. Flagellates and amoebae dominated the protozoan population, which declined to a most probable number of 28 · g (dry weight)−1 in a clay loam layer at the