Results 11 to 20 of about 25,655,192 (252)

Variations in radiocarbon ages of various organic fractions in core sediments from Erhai Lake, SW China [PDF]

, 2003
Radiocarbon dating was performed for the extracted organic fractions (cellulose-rich and humic acid fractions of plant fragment; fulvic acid, humic acid and humin fractions of humus substance) and shell from core sediments of the Erhai Lake, SW China ...
Xu, S., Zheng, G.
core   +9 more sources

Phosphorus Use Efficiency of Leafy Brassica sp. Grown in Three Contrasting Soils: Growth, Enzyme Activity and Phosphorus Fractionation

Plants, 2023
Plant adaptations to low soil phosphorus (P) availability have been intensively studied in Brassica sp. in an attempt to identify the mechanisms involved in P uptake and utilization.
Branimir Urlić, Gvozden Dumičić, Tomislav Radić, Smiljana Goreta Ban, Marija Romić   +4 more
doaj   +1 more source

Changes in P forms and fractions due to the addition of stover and biochar to growing crops in soils amended with stover and its biochar

Frontiers in Soil Science, 2023
IntroductionTo comprehend soil P transformation and crop P uptake, it is necessary to understand how the long-term substitution of mineral fertilizers with stover or biochar affects soil properties and P forms.
Xue Li, Xue Li, Xue Li, Na Li, Jin-Feng Yang, Yan-Sen Xiang, Xin Wang, Xiao-Ri Han, Xiao-Ri Han   +8 more
doaj   +1 more source

Soil organic carbon fractions in response to soil, environmental and agronomic factors under cover cropping systems: A global meta-analysis [PDF]

, 2023
Cover crops may improve soil health and increase soil carbon sequestration, thus contributing to both the adaptation to and mitigation of climate change.
Thomas, B. W., Hu, Y., Powlson, D. S., Shi, X., Jun, X., Hu, Q., Zhang, Y.   +6 more
core   +1 more source

Improvement of P Use Efficiency and P Balance of Rice–Wheat Rotation System According to the Long-Term Field Experiments in the Taihu Lake Basin

Frontiers in Environmental Science, 2022
Phosphorus (P) accumulation in rice–wheat rotation fields around the Yangtze River delta have been enriched during the last decades. To protect the environment and save P resources, we conducted field experiments to optimize the P application scheme ...
Liang Xiao, Guanglei Chen, Hong Wang, Yixuan Li, Chi Li, Liang Cheng, Wenge Wu, Wenge Wu, Xin Xiao, Yiyong Zhu   +9 more
doaj   +1 more source

Preferential attachment of Escherichia coli to different particle size fractions of an agricultural grassland soil. [PDF]

, 2007
This study reports on the attachment preference of a faecally derived bacterium, Escherichia coli, to soil particles of defined size fractions. In a batch sorption experiment using a clay loam soil it was found that 35% of introduced E.
Oliver, David M., Oliver, D. M., Heathwaite, A. L., Haygarth, Philip, Clegg, C. D., Haygarth, P. M., Clegg, Christopher D.   +6 more
core   +1 more source

Evaluation of phosphorus mobility in soil using different extraction methods

Plant, Soil and Environment, 2009
Soil samples (from Czech and German long-term field experiments) were used to estimate different soil phosphorus (P) fractions. More than 200 topsoil (0-30 cm) samples from different fertilizing treatments were taken.
M. Kulhánek, J. Balík, J. Černý, V. Vaněk   +3 more
doaj   +1 more source

Soil-aggregate phosphorus and its correlation with edaphic properties in a mountainous agricultural area of southeastern Brazil [PDF]

Revista Brasileira de Ciência do Solo
Dynamics of phosphorus (P) distribution, availability, and accumulation in reservoirs are influenced by land use and management. This study aimed to evaluate the total P (TP) content in soil aggregates formed under different vegetation cover types and ...
Silver Rodrigues Zandoná, Luiz Alberto da Silva Rodrigues Pinto, Robert Ferreira, Gabriel Coutinho Oliveira de Lemos, Isabella Silva Lopes, Matheus Corrêa de Oliveira, Eduardo Carvalho da Silva Neto, Marcos Gervasio Pereira   +7 more
doaj   +1 more source

Study of the trace metal ion influence on the turnover of soil organic matter in cultivated contaminated soils [PDF]

, 2006
The role of metals in the behaviour of soil organic matter (SOM) is not well documented. Therefore, we investigated the influence of metals (Pb, Zn, Cu and Cd) on the dynamic of SOM in contaminated soils where maize (C4 plant) replaced C3 cultures. Three
Quenea, Katelle, Toinen, S., Benedetti, M.F., Bermond, Alain, Benedetti, Marc F., Dumat, Camille, Quenea, K., Bermond, A.   +7 more
core   +1 more source

Changes in the Soil Phosphorus Supply with Rice Straw Return in Cold Region

Agronomy, 2023
Most phosphorus (P) in soil exists in nonlabile forms, leading to poor soil P supply capacity and limiting crop growth. This study evaluated the effect of 10 years of rice straw return on rice yield, soil P budget, P fractions, and phosphatase activity ...
Shuangshuang Yan, Chunxue Liu, Jianan Li, Jinwang Li, Can Cui, Jinsheng Fan, Zhenping Gong, Zhongxue Zhang, Chao Yan   +8 more
doaj   +1 more source