A biological hazard is one originating from an organism that is foreign (in presence or concentration) to the organism being affected. Many biological hazards are associated with food, including certain viruses, parasites, fungi, bacteria, and plant and seafood toxins.hree people crossing the Atlantic in a rowboat face a hazard of drowning... Three hundred people crossing the Atlantic in an ocean liner face the same hazard of drowning... The risk to each individual per crossing is given by the probability of the occurrence of an accident in which he or she drowns...
The best soil mix for your container-grown vegetables is one that is well-drained, well-aerated and has a pH that is close to neutral. Soil-containing or soilless potting mixes offer all of these features.
Mulch around tomato plants in the garden so you don't have to hoe weeds, potentially severing tomato roots in the process. Water deeply, but don't wait until the soil is bone dry to water again. If your tomato is in a large container, you may have to water more than once a day during the worst heat. Any plants -- flowers, herbs or vegetables -- growing in containers will dry more rapidly than if they were in the ground. How often you water will depend both on the size of the container and what you are growing.