Results 31 to 40 of about 5,332 (233)
Revista Brasileira de Ciência do Solo, 2005 O fósforo encontra-se no solo em diversas formas, que variam de acordo com a natureza química dos compostos a que está ligado e à energia de ligação com estes.
Luciano Colpo Gatiboni +2 more
doaj +1 more source
Environmental Progress &Sustainable Energy, EarlyView.Abstract This study evaluates the potential of a new organic fertilizer derived from porcine intestinal mucosa (designated BHE), a by‐product of the heparin extraction process, as a sustainable nitrogen (N) source for agriculture. The work was conducted in two stages: (i) chemical and spectroscopic characterization of BHE compared with poultry litter ...
Aline Zanquetti +3 more
wiley +1 more source
, 1989 Phosphorus (P) along with nitrogen (N) and potassium (K) comprise the three macronutrients most frequently added as fertilizer for growing plants. In Alaska soils, P is often the second most limiting nutrient after N. A proper supply of plant-available
Michaelson, Gary J., Ping, Chien Lu
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Scientia Agricola, 2010 Micronutrient availability can be affected by the increase of the soil pH due to surface liming. A field trial was carried out on a loamy, kaolinitic, thermic Typic Hapludox at Ponta Grossa, Paraná State, Brazil.
Adriel Ferreira da Fonseca +2 more
doaj +1 more source
Grassland Research, EarlyView.Under steady–state conditions, potential nitrogen mineralization in soil under grasslands is closely tied to potential carbon mineralization. This study provides supporting evidence that field–specific nitrogen fertilizer recommendations could be indicated by using a simple and rapid analysis of soil–test biological activity.
Alan J. Franzluebbers
wiley +1 more source
Revista Brasileira de Ciência do Solo, 2008 A mudança no sistema de preparo do solo e cultivo das plantas, do sistema convencional para o plantio direto, na profundidade de amostragem e o aumento de rendimento das culturas, ao longo do tempo podem alterar os teores críticos de P, as faixas de ...
Jairo André Schlindwein +1 more
doaj +1 more source
Boron availability and fertilizer response of maize in soils from sub‐Saharan Africa
Journal of Plant Nutrition and Soil Science, EarlyView.Abstract Background and aims Low boron (B) availability is associated with strongly weathered, coarse‐textured, and low organic matter soils, widespread in sub‐Saharan Africa (SSA). It is unknown to what extent B fertilization can increase maize yields in SSA.
Mirjam S. Breure +5 more
wiley +1 more source
Extratores de fósforo em solos da Amazônia tratados com fertilizantes fosfatados
Revista Brasileira de Ciência do Solo, 1997 Com o objetivo de avaliar a disponibilidade de fósforo em amostras de solos representativos da Amazônia, desenvolveu-se um experimento em casa de vegetação do Centro de Energia Nuclear na Agricultura, Piracicaba (SP), de outubro de 1993 a março de 1994 ...
E. C. Brasil, T. Muraoka
doaj +1 more source
Impacts of reindeer grazing on phosphorus sorption and nutrient availability in a tundra site
Oikos, EarlyView.Reindeer Rangifer tarandus, a large circumpolar herbivore, can influence whether nitrogen (N) or phosphorus (P) is the primary limiting nutrient in tundra plant communities. Specifically, findings from a site in northern Scandinavia suggest that under conditions where reindeer grazing stimulates inorganic N availability, grazing may drive ecosystems ...
Jerzy Szejgis +5 more
wiley +1 more source
Environmental aspects of soil phosphorus testing [PDF]
, 2005 peer-reviewedSoil phosphorus testing in Ireland uses Morgan’s reagent from samples taken to 10 cm depth for agronomic recommendations. However, its suitability as an environmental indicator has been questioned in terms of sample depth and extraction ...
Casey, A., Daly, Karen M.
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