Results 21 to 30 of about 273,328 (321)

Century-scale wood nitrogen isotope trajectories from an oak savanna with variable fire frequencies [PDF]

Biogeosciences, 2020
Fire frequency exerts a fundamental control on productivity and nutrient cycling in savanna ecosystems. Individual fires often increase short-term nitrogen (N) availability to plants, but repeated burning causes ecosystem N losses and can ultimately ...
M. L. Trumper, D. Griffin, S. E. Hobbie, I. M. Howard, D. M. Nelson, P. B. Reich, P. B. Reich, K. K. McLauchlan   +7 more
doaj   +1 more source

An investigation of the effect of biochar application rates on CO2 emissions in soils under upland rice production in southern Guinea Savannah of Nigeria

Heliyon, 2020
Biochar is a chemically recalcitrant carbon-rich solid material used in soil for its potential to improve soil quality and sequester carbon. While the rate of application has implications for soil carbon dioxide (CO2) emission and the overall benefits of
John Olajide Olaniyan, Theophilus Olufemi Isimikalu, Bashiru Ademola Raji, Kehinde Olayemi Affinnih, Sikiru Yusuf Alasinrin, Olusegun Nathaniel Ajala   +5 more
doaj   +1 more source

N- Mineralization of Organic Residues in Flooded and Aerated Saline Soils under Different Temperature

Maǧallaẗ al-baṣraẗ al-ʻulūm al-zirāʻiyyaẗ, 2019
Serious of incubation studies were conducted at Department of soil Science and Water Resources, College of Agriculture, university of  Basrah to study the effect of temperature incubation and soil salinity levels (3, 6, 12 and 24) dS.m-1 on N ...
Rawan M. Hamid, Abd Al-Mehdi S. Al-Ansari   +1 more
doaj   +1 more source

Soil organic carbon and clay content as deciding factors for net nitrogen mineralization and cereal yields in boreal mineral soils

European Journal of Soil Science, 2020
To achieve appropriate yield levels, inherent nitrogen (N) supply and biological N fixation are often complemented by fertilization. To avoid economic losses and negative environmental impacts due to over‐application of N fertilizer, estimation of the ...
Helena Soinne, R. Keskinen, Mari Räty, Sanna Kanerva, E. Turtola, Janne Kaseva, V. Nuutinen, A. Simojoki, T. Salo   +8 more
semanticscholar   +1 more source

Comparison of indices for the prediction of nitrogen mineralization after destruction of managed grassland [PDF]

, 2010
Intensively managed grasslands are occasionally chemically killed with herbicide and ploughed in order to grow an arable crop. After this management, large N mineralization rates with large losses to the environment are commonly observed.
Smit, A., Velthof, G.L.
core   +2 more sources

The soil N cycle: new insights and key challenges [PDF]

SOIL, 2015
The study of soil N cycling processes has been, is, and will be at the centre of attention in soil science research. The importance of N as a nutrient for all biota; the ever-increasing rates of its anthropogenic input in terrestrial (agro)ecosystems ...
J. W. van Groenigen, D. Huygens, P. Boeckx, Th. W. Kuyper, I. M. Lubbers, T. Rütting, P. M. Groffman   +6 more
doaj   +1 more source

Environmental Evaluation of Potentially toxic Elements Pollution in Sediments of Waterways of Saadabad Region, South of Kashan

Journal of Economic Geology, 2021
Introduction Soil and sediments are considered to be the main places for absorption of heavy metals in contaminated environments (Priju and Narayana, 2007; Øygard and Gjengedal, 2009; Ahmed and Al-Hajri, 2009).
Rezvan Mehvari , Seyed Hassan Tabatabaei
doaj   +1 more source

Managing soil fertility in organic farming systems [PDF]

, 2002
Complex relationships exist between different components of the organic farm and the quantity and quality of the end products depend on the functioning of the whole system.
Abawi, Altieri, Atkinson, Atkinson, Atkinson, Aulakh, Balloni, Bannerjee, Barnes, Baumann, Belesky, Berry, Bethlenfalvy, Breland, Bulson, Carruthers, Chan, Clark, Clement, Dale, Davies, Davies, Dewes, Djurhuus, Doran, Douds, Drinkwater, Edwards, Flieβbach, Foulkes, Frederiksson, Grace, Handayanto, Hansen, Haynes, Hetrick, Hetrick, Hogh-Jensen, Hornby, Hu, Inderjit, Jarvis, Jawson, Jenkinson, Jenkinson, Jensen, Jones, Karasawa, Kearney, Kessel, Kim, Knudsen, Kristensen, Lampkin, Ledgard, Liebman, Liebman, Lotz, Mader, Mc Gonigle, Mueller, NIAB, Nicholson, Nix, Olofsdotter, Phelan, Poutala, Rahn, Rahn, Rajan, Rayns, SAC, Sanchez, Schmidt, Scullion, Silgram, Soil Association, Spiertz, Stein-Bachinger, Stockdale, Stockdale, Stockdale, Swift, Sylvester-Bradley, Taylor, Teasdale, Theunissen, Tisdall, Toosey, Torbet, Torstensson, UKROFS, Vanlauwe, Wander, Watson, Watson, Watson, Weinhold, Wells, Whitmore, Wild, Willey, Willson, Wolfe, Wolfe, Workneh, Wyland   +106 more
core   +1 more source

Soil Scientific Research Methods Used in Archaeology – Promising Soil Biochemistry: a Mini-review

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2015
This work seeks to review soil scientific methods that have been used and are still being used in archaeology. This review paper aims at emphasising the importance of soil science practice to archaeology thus adding a scientific analytical nature to the ...
Valerie Vranová, Theodore Danso Marfo, Klement Rejšek   +2 more
doaj   +1 more source

Catch crop strategy and nitrate leaching following grazed grass-clover [PDF]

, 2007
Cultivation of grassland presents a high risk of nitrate leaching. This study aimed to determine if leaching could be reduced by growing spring barley (Hordeum vulgare L.) as a green crop for silage with undersown Italian ryegrass (Lolium multiflorum Lam.)
Andersen A., Best E.K., Davies D.B., Djurhuus J., Eriksen J., Hansen B., Jacobsen A., Karlsson-Strese E.-M., Kyllingsbaek A., Macduff J.H., Madsen H.B., Nielsen K.A., Nielsen K.A., Shepherd M.A., Simmelsgaard S.E., Tersbol M., Thomsen I.K., Trinsoutrot I.   +17 more
core   +1 more source