The Health Physics Society classifies radiation survey officers as journeymen or senior certified health physicists. According to that organizationâs 2011 Certified Health Physicist Survey, certified health physicists made an average $124,466 per year, with a minimum of $63,750 per year and $192,200 per year. They also received health, vacation and retirement benefits when working full-time.
You are here. Welcome Â» IFOAM Â» What We Do Â» Organic Landmarks Â» Principles of Organic Agriculture Â» The Principle of Care. Organic Agriculture should be managed in a precautionary and responsible manner to protect the health and well-being of current and future generations and the environment.
Shifting agriculture, system of cultivation that preserves soil fertility by plot (field) rotation, as distinct from crop rotation. In shifting agriculture a plot of land is cleared and cultivated for a short period of time; then it is abandoned and allowed to revert to its natural vegetation while the cultivator moves on to another plot. The period of cultivation is usually terminated when the soil shows signs of exhaustion or, more commonly, when the field is overrun by weeds.