### period | season | winter:

Cold winter
* can be quite good for hibernating insects because it means they hibernate properly
  - damage or kill sensitive species
* reduce beetle populations and limit disease development and spread.
* traumatize rye and increase the risk of ergot alkaloid formation.

Late winter
* brings a special season of change when the earth is caught between sleep and new life
  - on the spawning season for our largest fresh water game fish, the northern pike
* critical time for birds and other wildlife as they search for food sources.
* is the time to prune grape and wisteria vines
  - start many seeds indoors such as broccoli, cauliflower and tomatoes
* perfect time to move plants before they open their sleepy leaves.

Mild winter
* can result in higher beetle numbers.
* make ticks a year round threat.
* provide more plentiful food, as well as decreased stress from the elements.
* reduce snow cover, thus diminish spring run-off, exacerbating subsequent droughts.

Northern winter
* are the time to retrench from outdoor gardening and to look inward.
* tend to kill the plant's stems but allow the roots to survive.

Severe winter
* can cause mass mortality.
* increase winter mortality.

Warmer winter
* allow for more snow to fall in the high latitude regions.
* favor smaller phytoplankton such as cryptophytes.
* means that it snows more, because warm air can hold more moisture.

Winter rye
* grain product that protects and enriches the soil.
* is more common than wheat in northern Nebraska
  - often a more profitable crop than oats or barley
  - susceptible to snow mold damage and few seedlings survive the winter
  - the most hardy of the small grains and a very important winter cover crop
* prefers a well drained soil.

Winter sun
* can be as dangerous for the skin as summer sun
  - cause expansion of the wood, prompting splits and cracks to form
* requires protection just as does summer sun.

Semester
* Refers to the organisation of the teaching year.
* are part of school years
  - time periods

### period:

Shelf life
* is dependent upon packaging materials, handling and storage conditions
  - greatest when storage conditions are cool, dry and out of direct sunlight
  - linked to food quality , expiration date to food safety
  - the length of time that food can be stored
  - time periods. * the length of time that food can be stored. During this time, the quality of the food does not change, if it is kept under normal conditions. Frozen food that is not stored in the fridge or freezer will go bad earlier, for example. Most of these labels do not guarantee the safety of food. They should only be used as a guide
+ Shelf life, Shelf life: Foods
  * Shelf life is different from 'expiration date'. Shelf life is linked to food quality, expiration date to food safety. A product that has passed its shelf life might still be safe, but quality is no longer guaranteed. In most food stores, shelf life is controlled by using stock rotation. This means moving products with the earliest sell by date to the front of the shelf, so that most shoppers will pick them up first and so getting them out of the store. This is important, as stores can be fined for selling out of date products.
  * Shelf life is different from 'expiration date'. Shelf life is linked to food quality, expiration date to food safety. A product that has passed its shelf life might still be safe, but quality is no longer guaranteed. In most food stores, shelf life is controlled by using stock rotation. This means moving products with the earliest sell by date to the front of the shelf, so that most shoppers will pick them up first and so getting them out of the store. This is important, as stores can be fined for selling out of date products. Most shops, if not all, will have to mark such products down as wasted, leading to a loss of profit.