Results 41 to 50 of about 262,309 (231)
Acta Scientiarum: Animal Sciences, 2013 Four steers in individual paddocks with Marandu grass (B. Brizantha) in 4x4 square design were used to evaluate sunflower crushed supplementation in pasture-grazing animals on nitrogen balance and microbial protein synthesis. Supplements at 6 g kg-1 body
Hellen Leles Lima +5 more
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On the Use of Dimension Reduction or Signal Separation Methods for Nitrogen River Pollution Source Identification [PDF]
arXiv, 2022 Identification of the current and expected future pollution sources to rivers is crucial for sound environmental management. For this purpose numerous approaches were proposed that can be clustered under physical based models, stable isotope analysis and mixing methods, mass balance methods, time series analysis, land cover analysis, and spatial ...
arxiv
Estimating the effects of sea level rise on coupled estuarine nitrogen cycling processes through comparative network analysis [PDF]
Marine Ecology Progress Series 524: 137-154, 2013 Nitrogen (N) removal from estuaries is driven in part by sedimentary microbial processes. The processes of denitrification and anaerobic ammonium oxidation (anammox) remove N from estuaries by producing di-nitrogen gas, and each can be coupled to N recycling pathways such as nitrification and dissimilatory nitrate reduction to ammonium (DNRA ...
arxiv +1 more source
Czech Journal of Animal Science, 2021 The intercrop between grasses and legumes is an alternative to maintain and increase animal production. The study was conducted to evaluate the effect of grass-legume mixtures with or without supplementations on rumen fermentation, nutrient intake, and ...
Cassiano Albino Lorensetti +7 more
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Agronomy, 2021 Organic matter (OM) and nutrient nitrogen (N) play vital roles in the fertility and production of soil in accordance with goals of efficient environmental protection.
Dietmar Meyer, Hartmut Kolbe
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Balance of nitrogen, phosphorus, potassium in the soil depending on farming systems in crop rotation
Agrology, 2023 The objective of the research was the influence of different agricultural systems in field crop rotation on the formation of the balance of basic nutrition elements on low humus chernozem typical. We used field and laboratory methods.
S. P. Tanchyk +2 more
doaj
Agronomy, 2016 In intensive agriculture, N supply often exceeds crop requirements, even in nitrate vulnerable zones (NVZ). In farmland, the N surplus gives rise to NO3− leaching and consequent groundwater pollution.
Chiara Piccini +4 more
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Molecules, 2023 We verified whether milk thistle seeds and pot marigold seeds provided valuable components for a fibre-rich diet and how their addition affected body composition, nitrogen balance and lipid metabolism in rats.
Jarosław Koza, Adam Jurgoński
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Revista Brasileira de Zootecnia, 2002 O objetivo do presente trabalho foi determinar as exigências de proteína para aves reprodutoras pesadas através do método fatorial. A exigência de proteína bruta para mantença (PBm) foi determinada por intermédio da técnica do balanço de nitrogênio por ...
Carlos Bôa-Viagem Rabello +4 more
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Nitrogen line spectroscopy in O-stars -- III. The earliest O-stars [PDF]
, 2012 This is the third paper in a series aiming at the analysis of nitrogen abundances in O-type stars, to enable further constraints on the early evolution of massive stars. We provide first theoretical predictions for the NIV4058/NIII4640 emission line ratio in dependence of various parameters, and confront them with results from the analysis of a sample ...
arxiv +1 more source