Umbilical hernias are common in newborns and infants younger than 6 months. They occur when part of the intestines bulge through the abdominal wall next to the belly button. In babies with umbilical hernias, parents may see bulging around the belly button area when the baby cries. Unlike other types of hernias, umbilical hernias may heal on their own, usually by the time a baby is 1 year old. If not, surgery can repair the hernia.
soil amelioration. All Science Biotechnology and Genetics Food Biotechnology. The improvement of poor soils. Includes the fungal and bacterial break down of plant organic matter, to form humus; the release of minerals-such as phosphates-to the soil, making them available to plants; the fixation of nitrogen.Can sometimes include an element of bioremediation.ncludes the fungal and bacterial break down of plant organic matter, to form humus; the release of minerals-such as phosphates-to the soil, making them available to plants; the fixation of nitrogen. Can sometimes include an element of bioremediation.
COMPACTION OF SOILS. Compaction means pressing of soil particles close to each other by mechanical methods. Air during compaction is expelled from the void space in the soil mass and therefore the mass density is increased.Compaction is done to improve the engineering properties of the soil. Compaction of soil is required for the construction of earth dams, canal embankments, highways, runways and many other structures.STANDARD PROCTOR TEST. To assess the amount of compaction and water content required in the field, compaction tests are done on the same soil in the laboratory.OMPACTION OF SOILS. Compaction means pressing of soil particles close to each other by mechanical methods. Air during compaction is expelled from the void space in the soil mass and therefore the mass density is increased.