Book•
Soil Analysis: Handbook Of Reference Methods
01 Jan 2017-
About: The article was published on 2017-01-01 and is currently open access. It has received 247 citations till now. The article focuses on the topics: Soil test.
Citations
More filters
TL;DR: The RVFCW is a sustainable and promising treatment system for greywater use that can be run and maintained by unskilled operators and indicated a return over investment after approximately three years.
270 citations
TL;DR: In this paper, the spectral reflectance (SR) was used to measure soil attributes using satellite data as an alternative to traditional methods, such as traditional soil analyses are expensive, time-consuming, and may also result in environmental pollutants.
Abstract: Traditional soil analyses are expensive, time-consuming, and may also result in environmental pollutants. The objective of this study was to develop and evaluate a methodology to measure soil attributes using spectral reflectance (SR) as an alternative to traditional methods. Tropical Brazilian soils were sampled over a 196-ha area divided into grids. Samples (n 5 184) were obtained from the 0- to 20- and 80- to 100-cm depths and georeferenced. The laboratory SR data were obtained using a Spectroradiometer (400–2 500 nm). Satellite reflectance values were sampled from corrected Landsat Thematic Mapper (TM) images. Particle-size distribution and chemical analysis (organic matter [OM], cation-exchange capacity [CEC], total SiO2 ,F e 2O3, TiO2, sum of cations, cation, and Al saturation) were performed in the laboratory. Statistical analysis and multiple regression equations for soilattribute predictionsusingradiometricdataweredeveloped.Laboratory data used 22 bands and 13 ‘‘Reflectance Inflexion Differences, RID’’ from different wavelength intervals of the optical spectrum. However, the satellite data used only the reflectance of the 1, 2, 3, 4, 5, and 7 TM-Landsat bands. Multiple regression equations were derived from surface and subsurface soil layers. Estimations of some tropical soil attributes were possible using laboratory spectral analysis. Laboratory SR yielded high correlations with traditional laboratory analyses (R 2 . 0.79) for the soil attributes such as clay, sand, TiO2, and Fe2O3. Satellite spectral data correlated well with most of the soil attributes such as clay, Fe2O3, and TiO2 (reaching R 2 5 0.72). The use of soil analysis methodology by satellite and/or ground remote sensing constitutes an alternative to traditional routine laboratory analysis.
268 citations
TL;DR: This 75% higher production concurred with a lower inorganic nitrogen content in the water column, a higher THB abundance supplying additional single cell protein to augment the prawn production, and an improved periphyton productivity and quality.
185 citations
TL;DR: Treated greywater (GW) irrigation can be effectively irrigated without detrimental effects on soil or plant growth; however, raw GW may significantly change soil properties that can impact the movement of water in soil and the transport of contaminants in the vadose zone.
178 citations
TL;DR: In this article, it was suggested that surfactant accumulation in the soil due to greywater irrigation can create water-repellent soils, thereby affecting their flow patterns and productivity, and a flow pattern typical of hydrophobic soil was noted when the imbibition of fresh water into sands pre-treated with laundry detergent solution was tested.
167 citations