A power generation plant comprising a support structure formed by supporting piles (2) aligned fastened to the ground, such structure being a bi-dimensional "chessboard" structure placed on an agricultural land, with any orientation, a handling system for solar energy receptor devices (P) placed on the piles arranged in a row, adapted to allow the handling of such devices around at least a first axis (X). Such plant comprises, on the ground beneath such receptor devices, between rows of adjacent piles, one or more greenhouses (S) for intensive cultivation of agricultural products.