marți, 28 februarie 2017



foraje puturi

marți, 14 februarie 2017

Competition with endemic and cultivated plant life
Several indigenous or non-native crops are unwanted in a particular location for several reasons. [11] A significant an example may be that they hinder fiber and food production in agriculture, wherein they must be handled in order to prevent diminished or lost crop yields. Other important reasons are that they hinder other cosmetic, decorative, or recreational goals, such as with lawns, landscape architecture, playing fields, and golf courses. In the same way, they could be of matter for environmental reasons whereby unveiled kinds out-compete for resources or space with desired endemic plant life. For all these good reasons; horticulture, both cosmetic and functional, and environmental, - weeds interfere by:

competing with the required vegetation for the resources a vegetable typically needs, particularly, direct sunlight, ground nutrients, drinking water, and (to a smaller degree) space for progress;
providing hosts and vectors for seed pathogens, giving them higher possibility to infect and degrade the grade of the desired vegetation;
providing food or shelter for pet pests such as seed-eating wild birds and Tephritid super fruit flies that in any other case could hardly make it through seasonal shortages;[12]
offering irritation to the skin or digestive tracts of animals or people, either physical irritability via thorns, prickles, or burs, or chemical substance irritability via natural poisons or irritants in the weed (for example, the poisons within Nerium kinds);[13]
causing root harm to anatomist works such as drains, highway floors, and foundations,[14] obstructing channels and rivulets.[15]
In weed ecology some specialists speak of the partnership between "the three Ps": herb, place, perception. These have been very identified variously, however the weed traits shown by H.G. Baker are cited widely.[16][17]

Weeds have always been a concern, so long as humans have cultivated plant life perhaps. They are simply mentioned in a variety of historic texts, like a Shakespearean sonnet:

"To thy good bloom add the get ranking smell of weeds: / But why thy odour matcheth not thy show, / The dirt is this, that thou dost common grow."[18]

and the Bible:[1]

"Cursed is the bottom because of you; through unpleasant toil you will eat of everything the entire days and nights you will ever have. It'll produce thorns and thistles for you, so you shall eat the crops of the field. By sweat of your brow you shall eat your meal until you go back to the ground,"