Results 11 to 20 of about 1,115,302 (317)

Estimation of Variability of The Ratio of Total Nitrogen and Total Phosphorus Concentrations in Marginal Filters of Tidal Estuaries of The White and Barents Seas [PDF]

, 2022
It was revealed that the parameter Ntot./Ptot. in the tidal mouths of the rivers of the western sector of the Russian Arctic tends to increase in the zone of the biological stage of the marginal filter as it approaches the waters of the open waters of ...
Korobov Vladimir Borisovich, Miskevich I.V.   +1 more
core   +1 more source

Total Nitrogen Determination by a Spectrophotometric Method [PDF]

, 2019
Being able to measure total nitrogen (TN) is important for following the nitrogen budget. In this chapter, we present the spectrophotometric method we use for determining TN. The method relies on oxidation and reduction steps, involving persulfate digestion of nitrogen compounds into nitrate followed by spectrophotometric determination.
Koistinen, Jaana, Sjöblom, Mervi Anitta, Spilling, Kristian   +2 more
openaire   +3 more sources

Avaliação preliminar das cargas difusas de origem rural, em uma sub-bacia do Rio Jaguari, SP Preliminary assessment of diffused loads from rural areas in a sub-basin of the Jaguari River, SP, Brazil

Revista Brasileira de Engenharia Agrícola e Ambiental, 2006
Dados oficiais de concentração de nutrientes e vazão do Rio Jaguari, foram utilizados na avaliação das contribuições difusas, com origem rural, às águas superficiais de uma sub-bacia do Rio Jaguari, SP. Modelos de cargas médias diárias de Ntotal e Ptotal
Maria T. C. Mansor, José Teixeira Filho, Denis M. Roston   +2 more
doaj   +1 more source

Spatiotemporal Changes in Soil Nutrients: A Case Study in Taihu Region of China

Journal of Integrative Agriculture, 2014
The accurate assessment of the spatiotemporal changes in soil nutrients influenced by agricultural production provides the basis for development of management strategies to maintain soil fertility and balance soil nutrients.
Lei-lei LIU, Yan ZHU, Xiao-jun LIU, Wei-xing CAO, Mao XU, Xu-kui WANG, En-li WANG   +6 more
doaj   +1 more source

Effect of Bacterial Inoculation and of Nitrogen Fertilization on Fodder Quality in Some Grass and Fodder Legume Species

Scientific Papers Animal Science and Biotechnologies, 2023
Increasing the biological nitrogen fixing capacity through inoculation with improved stems of nitrogen fixing bacteria is an important measure of increasing total nitrogen content in legumes due to the supply of fixed nitrogen.
Claudiu Ghiocel, Neculai Dragomir, Dorin Camen, Carmen Dragomir, Dorin Rechiţean, Ilie Toth, Anca Sala, Florin Neciu   +7 more
doaj  

TOTAL NITROGEN DETERMINATION BY THE KOBER METHOD. [PDF]

Journal of the American Chemical Society, 1909
n ...
Gill, F. W., Grindley, H. S.
openaire   +1 more source

Organic carbon and nitrogen content in Estonian erosion-affected soils

Agraarteadus, 2020
The work is dedicated to the characterization of erosion-affected soils' (EAS) humus status (HS) in pedo-ecological conditions of South-Eastern Estonia.
Raimo Kõlli, Karin Kauer, Tõnu Tõnutare   +2 more
doaj   +1 more source

The influence of inherent soil factors and agricultural management on soil organic matter

Ecosphere, 2023
The accumulation of soil organic matter (SOM) is vital to the agronomic and environmental functioning of agroecosystems, yet the relative influence of inherent soil properties and agricultural management practices on SOM dynamics are not often addressed ...
Gregory S. Richardson, Matthew D. Ruark, Timothy Radatz, Amber Radatz, Eric Cooley, Erin M. Silva, Abigail J. Augarten, Jun Zhu, Chelsea H. Zegler   +8 more
doaj   +1 more source

Evaluation of Nitrification Process in Constructed Wetlands: A review on Novel Biological Nitrogen Removal Processes

Journal of Engineering and Sustainable Development, 2022
Constructed wetlands attracted the attention of researchers as a sustainable, economic and efficient wastewater treatment technique. Many papers showed the efficient performance of constructed wetlands to treat municipal, industrial, livestock, petroleum
Yasir T. Hameed, Narmeen A. Abdalqadir, Hala H. Nussrat, Khaled M. Shahot   +3 more
doaj   +1 more source

Determination of Total Nitrogen in Plant Fruits by Graphite Digestion Apparatus and Automatic Azotometer

Yankuang ceshi, 2020
BACKGROUND By measuring the nitrogen content in plant fruits, the growth status of plants can be grasped and important information for improving the yield of high-quality fruits can be provided.
WU Gang, ZHANG Zhao-fa, SONG Fan, LIU Xian, MA Hui-chun, PANG Xue-min, ZHANG Jia-lin, LIU Yan-yun   +7 more
doaj   +1 more source