What Is Crop Rotation And What Are The Benefits Of Crop Rotation

The land that we need for growing food is very important. We can't afford to spoil it. There are many ways in which farmers could make better use of the land and grow good crops without the help of factory-made chemicals.
If it is farmed with care, the land will go on giving us enough food to eat for thousands of years to come.
One method of careful farming is called crop rotation.
Different kinds of plants take different nutrients from the soil and leave others behind. The same crop planted year after year takes out the same nutrients.
But different crops, like corn and alfalfa, can be planted on the same piece of land.
One year, corn is planted. This will take out certain nutrients from the soil. The following year, alfalfa will be planted. The alfalfa will put back the nutrients absorbed by the corn.

Health Care Careers List - List of Jobs in The Medical Field

Medical specialists are medical professionals who have knowledge, education, and training in a particular field of medicine.
In the following lists are presented some types of medical specialists and their areas of expertise.

List of medical careers

Allergist 

Area of expertise: Treatment of allergies

Anesthesiologist 

Area of expertise: Administration of anesthetics for surgery

Cardiologist 

Area of expertise: Diseases of the heart and circulatory system

Pulmonary Specialist

Area of expertise: Diseases of the lungs and chest

Dermatologist

Area of expertise: Diseases of skin, hair, and nails

Emergency Medicine Specialist

Area of expertise: Emergency treatment of acute illnesses and injuries

Epidemiologist

Area of expertise: Causes, transmission, and control of infectious diseases

Family Physician

Area of expertise: Ongoing health care for persons of all ages

Gastroenterologist

Area of expertise: Diseases of the digestive system

General Surgeon

Area of expertise: Surgical treatment of diseases of the abdomen, breast, and other areas

Gynecologist

Area of expertise: Diseases of the female reproductive organs

Hematologist

Area of expertise: Diseases of the blood, bone marrow, and lymph tissues

Internist

Area of expertise: Nonsurgical treatment of diseases of the internal organs

Nephrologist

Area of expertise: Diseases of the kidney

Neurologist

Area of expertise: Diseases of the brain and nervous system

Neurosurgeon

Area of expertise: Surgical treatment of diseases of the brain and spinal cord 

Obstetrician

Area of expertise: Health care for pregnancy, labor, and childbirth

Oncologist 

Area of expertise: Treatment of cancer

Ophthalmologist

Area of expertise: Diseases of the eye

Orthopedist 

Area of expertise: Diseases of the bones, joints, and muscles

Otolaryngologist 

Area of expertise: Diseases of the ear, nose, throat, and neck

Pathologist

Area of expertise: Study of biopsy specimens and body fluids

Pediatrician

Area of expertise: Health care of infants, children, and adolescents

Physiatrist 

Area of expertise: Rehabilitation of patients following illness or injury

Plastic Surgeon

Area of expertise: Cosmetic surgery and surgical reconstruction

Podiatrist

Area of expertise: Disorders of the foot

Proctologist

Area of expertise: Diseases of the anus, rectum, and colon

Psychiatrist

Area of expertise: Treatment of mental disorders

Radiologist

Area of expertise: Study of X ray and ultrasound

Rheumatologist

Area of expertise: Treatment of rheumatic diseases

Urologist

Area of expertise: Diseases of the urinary tract and the male reproductive organs

Vascular Surgeon

Area of expertise: Surgical treatment of diseases of blood vessels