Effects of Sewage Sludge and Sludge Compost Applied to Soil on some Soil Physical and Chemical Properties 1
The effects of different application rates of sewage sludge and sludge compost (0, 40, 80, 120, and 240 metric tons/ha) on soil physical and chemical properties were studied at two pH levels.
Sludge application rates exceeding 120 metric tons/ha were difficult to apply and produced a cloddy seedbed, while the same rate of compost was easily applied and produced a friable seedbed. Sludge and compost increased the water content and the water retention of a silt loam soil. Both the sludge and compost increased the salinity and chloride levels of the soil to a level which may affect salt-sensitive plants. The soil’s cation exchange capacity increased as much as threefold as a result of the addition of sludge and compost. [1]
Deforestation effects on soil physical and chemical properties, Lordegan, Iran
The effects of various application rates of sewage sludge and sludge compost (0, 40, 80, 120, and 240 metric tons/ha) on soil physical and chemical properties were studied at two pH levels.
Sludge application rates exceeding 120 metric tons/ha were difficult to use and produced a cloddy seedbed, while an equivalent rate of compost was easily applied and produced a friable seedbed. Sludge and compost increased the water content and therefore the water retention of a silt loam soil. Both the sludge and compost increased the salinity and chloride levels of the soil to A level which can affect salt-sensitive plants. The soil’s cation exchange capacity increased the maximum amount as threefold as a results of the addition of sludge and compost. [2]
Bulk Density of Soils in Relation to Soil Physical and Chemical Properties
Soil scientists and engineers commonly require bulk density (Db) data as parameter input of simulation models predicting a good range of soil processes. Field methods exist to live Db, but are labor intensive and time consuming. Much effort has been recently dedicated to evaluate alternative procedures to predict Db from soil physical and chemical data. Using data of about 12 000 soil pedons from the continental USA, Hawaii, Puerto Rico, and a few foreign countries, multiple correlation relationships were developed to predict Db at −33 kPa moisture content. the info base was partitioned in small homogeneous data sets consistent with their Soil Taxonomy classification. Regression relationships between Db and soil properties indicated that Db are often accurately predicted (R2 > 0.60) from organic-C content for Inceptisols and Spodosols. [3]
Effects of sedimentation on soil physical and chemical properties and vegetation characteristics in sand dunes at the Southern Dongting Lake region, China
Sedimentation is recognized as a serious factor determining the ecosystem processes of lake beaches; however, the underlying mechanisms, especially in freshwater sand dunes, are insufficiently studied. to the present end, nine belt transects from nine freshwater sand dunes, classified into low (<23.7 m), medium (25.4–26.0 m), and high-elevation groups (>28.1 m) supported their elevations in 1972, were sampled to research differences in erythrocyte sedimentation rate and soil and vegetation characteristics in Southern Dongting Lake, China. [4]
Variation in Soil Physical and Chemical Properties as Affected by Three Slope Positions and Their Management Implications in Ganye, North-Eastern Nigeria
Understanding topography or slopes, identifying physical and chemical properties of soils improves greatly informed management decisions for agricultural productivity. The study on variation of some physical and chemical properties of soils as suffering from slope positions was aimed toward providing critical fertility status of the soils. Farmers have complained of reduced output from their farm lands thanks to leaching activities and erosion hazards. Slope positions were delineated using the Geographic data system (GIS) and three different slope positions were identified (SP1, SP2 and SP3), and every slope position was recognized as a unit. Three (3) profile pits were dug in each unit located at Kugon (SP3), Timdore (SP2) and Sammeri (SP1) respectively. [5]
Reference
[1] Epstein, E.L., Taylor, J.M. and Chancy, R.L., 1976. Effects of sewage sludge and sludge compost applied to soil on some soil physical and chemical properties 1. Journal of Environmental Quality, 5(4), (Web Link)
[2] Hajabbasi, M.A., Jalalian, A. and Karimzadeh, H.R., 1997. Deforestation effects on soil physical and chemical properties, Lordegan, Iran. Plant and soil, 190(2), (Web Link)
[3] Manrique, L.A. and Jones, C.A., 1991. Bulk density of soils in relation to soil physical and chemical properties. Soil Science Society of America Journal, 55(2), (Web Link)
[4] Effects of sedimentation on soil physical and chemical properties and vegetation characteristics in sand dunes at the Southern Dongting Lake region, China
Ying Pan, Hao Zhang, Xu Li & Yonghong Xie
Scientific Reports volume 6, (Web Link)
[5] A. Gisilanbe, S., J. Philip, H., I. Solomon, R. and E. Okorie, E. (2018) “Variation in Soil Physical and Chemical Properties as Affected by Three Slope Positions and Their Management Implications in Ganye, North-Eastern Nigeria”, Asian Journal of Soil Science and Plant Nutrition, 2(3), (Web Link)