Victor - a person who defeats an enemy or opponent in a battle, game, or other competition.Enter - begin to be involved in. In this case (because of the 2 words), I think that the victor is the person who wins the competition while the word enter, or the phrase to enter, is probably meant as in to enter the competition.
Very very very very very nice
It helps in understanding which crop should be cultivated on a particular land.
It also helps in gaining information about how agriculture can be done in poorer soils.
It gives information about the nutrient quality of the soil.
This avoids wastage of capital on the cultivation of unsuitable crops.
It also helps in controlling pests and insects.
