Vertical section through a soil is called soil profile. The | Agriculture Exams Library
Vertical section through a soil is called soil profile.
The relative proportion of sand, silt and clay in the soil know as soil texture.
The arrangement of primary particles and their aggregates into a certain definite pattern is called as soil structure.
Particle density or absolute density or gain density and bulk density are expressed in term of mg/m' or gms/cm³.
The weight of per unit volume of the solid portion of soil is called particle or real density. The mass (weight) per unit volume of dry soil is called as apparent or bulk density. Particle density (2.65 gm/c.c) is always higher than bulk density (1.33-165 gm/c.c)
Poudrette is called as night soil manure.
Gypsum is used for reclamation of alkali soils.
Sandy loam soil is light textured. Specific gravity of soil is 0.2 and for water it is 1.0.
One gram of soil contains 14 millions of microorganisms.
The macrospores in the soil generally constitute of soil air.
Vertisols is related to black soils. Red soil is found in Tamil Nadu. Fossils are found in sedimentary rocks.
The length of engineer chain is 100 ft. while Gunter chain is 66 ft.
Red soils are mainly falls under the Alfisols.
Clay soils can become as hard as a stone on drying.
The transfer of minerals from the top soil to sub soil through water is called as leaching.
Phosphorous fertilizer are fixed immediately after application in the soil.
Aspergillus niger is used to test the potassium element status in the soil.
Cation exchange capacity is expressed in term of me/100 g or c mol/kg.
