Results 21 to 30 of about 244,552 (310)

Dietary selenium intake among Ethiopian children in areas known for selenium spatial variability

Frontiers in Nutrition, 2023
IntroductionThere is spatial variability of selenium (Se) in soil and crops in Ethiopia. We assessed the Se content of food items, breast milk, and urine among infants in Ethiopia from two areas with contrasting Se concentrations in soils.MethodsDietary ...
Kaleab Hailu, Kaleab Hailu, Edward J. M. Joy, Edward J. M. Joy, Elaine L. Ferguson, Elizabeth H. Bailey, Lolita Wilson, Kenneth Davis, Martin R. Broadley, Martin R. Broadley, Dawd Gashu   +10 more
doaj   +1 more source

Tropical Soil Humus

, 2022
In strongly weathered tropical soils, humus and humic substances (HSs) appear to play an important role in soil fertility because they represent the dominant reservoir and source of plant nutrients. As the refractory organic carbon form of soil, HSs play a vital role in the atmospheric CO2 sequestration.
Rolf, Gael, Mabicka Obame, Musadji, Neil-Yohan,, Mounguengui, Michel, Mbina   +2 more
openaire   +2 more sources

Phosphate Sorption in Oxisols in Paraíba State, Brazil, Classified as Solution Equilibrium Phosphorus [PDF]

Iranica Journal of Energy and Environment, 2012
Aiming to evaluate the phosphorus adsorption in Oxisols with phosphorus remaining classified using the Langmuir isotherm, a study was developed in the laboratory at Federal University of Campina Grande, PB, with samples of the surface layer (0-20 cm) of ...
Lucia Helena Garófalo Chaves, Vinícius Batista Campos Mônica, Shirley da S. Sousa, D oroteu Honório Guedes Filho, Maria Alexandra Estrela, Adilson David de Barros   +5 more
doaj  

Mitigating Potassium Leaching from Muriate of Potash in a Tropical Peat Soil Using Clinoptilolite Zeolite, Forest Litter Compost, and Chicken Litter Biochar

Agronomy, 2021
Using muriate of potash (MOP) as a source of potassium (K) is a cost-effective method for crop production in tropical peat soils. However, exchangeable K commonly leaches from tropical peat soils because of high rainfall and a lack of clay to retain this
Kavinraj Krishnan, Audrey Awing Ngerong, Karen Ahim, Osumanu Haruna Ahmed, Maru Ali, Latifah Omar, Adiza Alhassan Musah   +6 more
doaj   +1 more source

Potential net primary productivity in South America: application of a global model [PDF]

, 1991
We use a mechanistically based ecosystem simulation model to describe and analyze the spatial and temporal patterns of terrestrial net primary productivity (NPP) in South America.
Kicklighter, David W., Melillo, Jerry M., Moore, Berrien, III, Peterson, B. J., Raich, J. W., Rastetter, E. B., Schloss, Annette L., Steudler, P. A., Vorosmarty, Charles J.   +8 more
core   +2 more sources

Limits of agricultural greenhouse gas calculators to predict soil N2O and CH4 fluxes in tropical agriculture [PDF]

, 2016
Acknowledgements This work was undertaken as part of the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS), which is a strategic partnership of CGIAR and Future Earth.
Chirinda, Ngonidzashe, De Neergaard, Andreas, Duong Vu, Quynh, Hillier, Jonathan, Keller, Emma, Ly, Proyuth, Malin, Daniella, Metzel, Ruth, Nyamadzawo, George, Oelofse, Myles, Olesen, Jørgen E., Richards, Meryl, Rosenstock, Todd S., Wollenberg, Eva   +13 more
core   +2 more sources

An assessment of phosphorus soil tests for some tropical acid soils in Southern Thailand [PDF]

Songklanakarin Journal of Science and Technology (SJST), 2005
Phosphorus deficiency is a major problem for tropical acid soils in southern Thailand, thus P fertilizer and lime are usually applied to soils to improve crop yield.
Nilnond, C., Leowarin, W., Maneepong, S.
doaj  

Effects of sterilization techniques on chemodenitrification and N₂O production in tropical peat soil microcosms [PDF]

Biogeosciences, 2019
Chemodenitrification – the non-enzymatic process of nitrite reduction – may be an important sink for fixed nitrogen in tropical peatlands. Rates and products of chemodenitrification are dependent on O2, pH, Fe2+ concentration, and organic matter ...
S. Buessecker, K. Tylor, J. Nye, K. E. Holbert, J. D. Urquiza Muñoz, J. D. Urquiza Muñoz, J. D. Urquiza Muñoz, J. B. Glass, H. E. Hartnett, H. E. Hartnett, H. Cadillo-Quiroz, H. Cadillo-Quiroz   +11 more
doaj   +1 more source

Redox Fluctuations Control the Coupled Cycling of Iron and Carbon in Tropical Forest Soils. [PDF]

, 2018
Oscillating redox conditions are a common feature of humid tropical forest soils, driven by an ample supply and dynamics of reductants, high moisture, microbial oxygen consumption, and finely textured clays that limit diffusion.
Bhattacharyya, Amrita, Campbell, Ashley N, Kukkadapu, Ravi K, Lin, Yang, Nico, Peter S, Pett-Ridge, Jennifer, Silver, Whendee L, Tfaily, Malak M   +7 more
core   +3 more sources

Tree Species and Epiphyte Taxa Determine the “Metabolomic niche” of Canopy Suspended Soils in a Species-Rich Lowland Tropical Rainforest

Metabolites, 2021
Tropical forests are biodiversity hotspots, but it is not well understood how this diversity is structured and maintained. One hypothesis rests on the generation of a range of metabolic niches, with varied composition, supporting a high species diversity.
Albert Gargallo-Garriga, Jordi Sardans, Abdulwahed Fahad Alrefaei, Karel Klem, Lucia Fuchslueger, Irene Ramírez-Rojas, Julian Donald, Celine Leroy, Leandro Van Langenhove, Erik Verbruggen, Ivan A. Janssens, Otmar Urban, Josep Peñuelas   +12 more
doaj   +1 more source