New DDT inputs after 30 years of prohibition in Spain. A case study in agricultural soils from south-western Spain

2011 ◽  
Vol 159 (12) ◽  
pp. 3640-3646 ◽  
Author(s):  
Juan Muñoz-Arnanz ◽  
Begoña Jiménez
Keyword(s):  
Agricultural Soils ◽  
Western Spain

Seed provenance determines germination responses of Rumex crispus (L.) under water stress and nutrient availability

2019 ◽  
Vol 12 (6) ◽  
pp. 949-961 ◽  
Author(s):  
María Pérez-Fernández ◽  
Carole P Elliott ◽  
Alex Valentine ◽  
José Antonio Oyola
Keyword(s):  
Reproductive Effort ◽  
Agricultural Soils ◽  
Inorganic Nitrogen ◽  
Seedling Emergence ◽  
Plant Mortality ◽  
Rumex Crispus ◽  
Reciprocal Transplantation ◽  
Transplantation Experiment ◽  
Germination Trial ◽  
Western Spain

Abstract Aims Seeds of Rumex crispus from six provenances were studied in relation to their germination under drought and presence of nitrogen in the germination and emergence media. We also investigated whether adaptation to soil increases the ability of the species to colonize and establish in contrasting environments along a longitudinal gradient in western Spain by means of a reciprocal transplantation experiment. Methods We conducted a germination trial in the lab to test for the germination responses to water scarcity along a polyethylene glycol gradient and to varying concentrations of nitrogen compounds. Simultaneously reciprocal transplantations experiment was conducted, where seeds from six provenances were grown in the soils from the very same provenances. Seedling emergence, survivorship and fitness-related variables were measured in all plots. Important Findings We found that R. crispus has a cold-stratification requirement that enhances its germination. Significant differences between the six provenances were detected for time-to-germination, total seedling emergence, plant mortality and reproductive effort in all the experiments. The differences between provenances with respect to germination were confirmed by the significant statistical analyses of the variance, thus providing evidence that seeds from parent plants grown in different environmental conditions have an intrinsically different abilities to germinate and establish. Soil nitrogen content where seed germination and seedlings establish also play an important role in their performance in terms of survivorship and reproduction, being the higher levels of inorganic nitrogen and of microbial biomass those that increased biomass production, enhanced inflorescence formation and reduced plant mortality. We conclude that one of the main reasons for the spread and maintenance of R. crispus would be the increased levels of nitrogen in agricultural soils.

Soil respiration and N2O emission in croplands under different ploughing practices: a case study in south-east China

Soil Research ◽  
2009 ◽  
Vol 47 (2) ◽  
pp. 198 ◽  
Author(s):  
Shutao Chen ◽  
Yao Huang
Keyword(s):  
Soil Respiration ◽  
Soil Temperature ◽  
Agricultural Soils ◽  
Field Measurements ◽  
Triticum Aestivum L ◽  
N2o Emission ◽  
Cropping Season ◽  
Significant Difference

Studies on the CO2 and N2O emission patterns of agricultural soils under different ploughing practices may provide an insight into the potential and magnitude of CO2 and N2O mitigation in highly managed farmland soils. In this study, field measurements of soil respiration and N2O flux with different ploughing depths were performed in the 2003–04 wheat (Triticum aestivum L.), 2004 maize (Zea mays L.), and 2004–05 wheat seasons. Soil temperature and moisture were simultaneously measured. Results showed that, in each cropping season, the seasonal variation in soil respiration developed with a similar pattern for different treatments, which was primarily regulated by soil temperature. This work demonstrates that ploughing depth can influence long-term loss of carbon from soil, but this was contingent on preceding cropping types. Given the same preceding cropping practice, no significant difference in N2O emission was found among different ploughing depths in each cropping season.

scholarly journals Human health and ecological risk assessment of heavy metal(loid)s in agricultural soils of rural areas: A case study in Kurdistan Province, Iran

2020 ◽  
Vol 18 (2) ◽  
pp. 469-481
Author(s):  
Kamaladdin Karimyan ◽  
Mahmood Alimohammadi ◽  
Afshin Maleki ◽  
Masud Yunesian ◽  
Ramin Nabizadeh Nodehi ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Heavy Metal ◽  
Human Health ◽  
Ecological Risk ◽  
Ecological Risk Assessment ◽  
Rural Areas ◽  
Agricultural Soils

Speciation of Cr, Cu, Ni and Zn in soils irrigated with contaminated waters: A case study of agricultural soils from the plain of Saiss (Fez, Morocco)

2014 ◽  
Vol 73 (7) ◽  
pp. 3465-3474 ◽  
Author(s):  
Meriém Bellarbi ◽  
Naoual Rais ◽  
Françoise Elsass ◽  
Joelle Duplay ◽  
Mustapha Ijjaali
Keyword(s):  
Agricultural Soils ◽  
Contaminated Waters

Spatial Distribution and Evaluation of Cadmium in Agricultural Soils Based on GIS: A Case Study of Chaoyang City in China

2012 ◽  
Vol 518-523 ◽  
pp. 2806-2811
Author(s):  
Wen Juan Jia ◽  
Ying Yan ◽  
Ying Su ◽  
Ming Da Liu
Keyword(s):  
Spatial Distribution ◽  
Agricultural Soil ◽  
Agricultural Soils ◽  
Geoaccumulation Index ◽  
Pollution Index ◽  
Average Concentration ◽  
Soil Samples ◽  
Soil Environment ◽  
Index Method

To identify the concentration and spatial distribution of cadmium (Cd) in agricultural soils, 207 soil samples were collected from Chaoyang and analyzed based on pollution index methods and GIS. The concentration of Cd in the soils of Chaoyang ranged from 0.030 to 0.687 mg/kg, with an average concentration of 0.246 mg/kg. The evaluated results of Cd in agricultural soils of Chaoyang shows that the pollution excess rate is 2.90%, the total agricultural soil environment of Cd was still clean, but some areas were accumulated by Cd. The differences between two evaluated methods indicate that evaluated criteria had a direct impact on the evaluation results, compared to integrated pollution index, the Geoaccumulation index method was more accurate and objective.

Sign in / Sign up

Export Citation Format

Share Document