Plant that fulfils no useful function for man and which injures agricultural crops by competing with or living off them.

OUTERMOST PART OF A FRUIT, ALSO CALLED SKIN.

Branch of science that studies the biosphere, i.e. the part of the planet in which life is present, the characteristics of which are determined by the interaction between organisms and between organisms and their surrounding environment, or parts of the biosphere.

SET OF NATURAL OR MAN-MADE SYSTEMS TO REMOVE EXCESS SURFACE AND SUBSURFACE WATER FROM THE SOIL.

PRACTICE OF REMOVING WEEDS FROM AGRICULTURAL CROPS.

Substance used to control weeds

COMBINATION OF BIOLOGICAL AND BIOTECHNICAL MANAGEMENT TECHNIQUES AND GOOD CULTURAL PRACTICES IN WHICH CHEMICALS ARE USED ONLY WHEN STRICTLY NECESSARY.

PROCESS OF LAND DEGRADATION CAUSED BY NUMEROUS FACTORS, INCLUDING CLIMATIC CHANGES AND HUMAN ACTIVITY.