Results 11 to 20 of about 29,105 (263)

Unsaturated soils in the context of tropical soils

open access: yesSoils and Rocks, 2021
Abstract The practice of geotechnical engineering in tropical climate regions must consider the use of unsaturated soil concepts. However, these concepts must also take into account the specific behavior traits of tropical soils, particularly those related to soil aggregation, pore structure, and mineralogy.
Carvalho, José Camapum de   +1 more
openaire   +3 more sources

Genesis of sandstone-derived soils in the Cerrado of the Piauí State, Brazil

open access: yesRevista Ambiente & Água, 2019
This study characterized the morphological, physical and chemical attributes of sandstone-derived soils at the Cerrado of the Piauí State, Brazil, in order to identify evolutionary standards.
Diego Ferreira de Souza   +5 more
doaj   +1 more source

Managing cassava growth on nutrient poor soils under different water stress conditions

open access: yesHeliyon, 2021
Nitrogen (N), phosphorus (P) and potassium (K) fertiliser application, was able to counteract growth reductions, in cassava cultivated on nutrient poor soils, under one water stress condition.
Matema L.E. Imakumbili   +4 more
doaj   +1 more source

Calibration of an empirical model for moisture content assessment and monitoring in compacted tropical soils used in the subgrade of road pavements

open access: yesRevista Ingeniería de Construcción, 2020
Subgrade moisture variation monitoring and control is important due to its influence on road pavement performance and service life. The precise application of non-invasive techniques such as time domain reflectometry (TDR) and ground penetration radar ...
I. Pizarro   +3 more
doaj   +1 more source

eDNA extraction protocol for metagenomic studies in tropical soils

open access: yesBioTechniques, 2021
The lack of knowledge about biological communities residing in soils, especially those in tropical regions, represents a constraint to management practices to take advantage of the ecological services provided by soil microbiota to agroecosystems. One of
Fabián Echeverría-Beirute   +4 more
doaj   +1 more source

Dissipation of DvSnf7 Double-Stranded RNA in Brazilian Soils

open access: yesAgricultural & Environmental Letters, 2019
Characterizing the environmental fate of DvSnf7 double-stranded RNA (dsRNA) produced by MON 87411 maize ( L.) in Brazilian soils is a critical component to a comprehensive environmental risk assessment.
Marcela Emanuele Scarso Joaquim   +6 more
doaj   +1 more source

Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region

open access: yesRevista Brasileira de Ciência do Solo, 2019
In the Brazilian Cerrado biome, there are wetlands locally known as “Veredas”, which are swampy plains between hills and rivers. Since the 1970’s, the Cerrado biome has been gradually converted to livestock, crop, or forestry production.
Bruno Teixeira Ribeiro   +6 more
doaj   +1 more source

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

open access: yesIranica 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   +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

open access: yesAgronomy, 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   +6 more
doaj   +1 more source

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

open access: yesSongklanakarin 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  

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