A tractor attachment for loosening and deep root fertilization, having a three-point attachment and an attachment to a cardan shaft, comprises a loosening assembly and a deep root fertilization assembly, wherein the soil loosening assembly comprises a cantilever oriented in a direction opposite the direction of tractor's driving, a carrier leg arranged on the cantilever and oriented substantially vertically towards the ground, a carrier arranged at an end of the carrier leg, on which carrier a loosening plate in the form of a main ploughshare is pivotally mounted, a rod in the form of a cutting blade attached to the loosening plate and lifting it so that the latter oscillates and loosens the soil, the deep fertilization assembly comprises a fertilizer container having a dispenser with a dosing wheel arranged in the bottom section, two delivery pipes emanating from the container, a turbine fan that delivers a pressurised air via a pipe to a delivery pipe to increase the pressure of the fertilizer in the delivery pipe, a cogwheel that is pivotally mounted on the cantilever to measure the speed of the tractor attachment, characterized in that the dosing wheel is a double helical worm, whose form allows a precise amount of fertilizer to be dosed, wherein the double helical worm is driven by an electric motor controlled by a control device. the soil loosening assembly comprises a cantilever oriented in a direction opposite the direction of tractor's driving, a carrier leg arranged on the cantilever and oriented substantially vertically towards the ground, a carrier arranged at an end of the carrier leg, on which carrier a loosening plate in the form of a main ploughshare is pivotally mounted, a rod in the form of a cutting blade attached to the loosening plate and lifting it so that the latter oscillates and loosens the soil, a cantilever oriented in a direction opposite the direction of tractor's driving, a carrier leg arranged on the cantilever and oriented substantially vertically towards the ground, a carrier arranged at an end of the carrier leg, on which carrier a loosening plate in the form of a main ploughshare is pivotally mounted, a rod in the form of a cutting blade attached to the loosening plate and lifting it so that the latter oscillates and loosens the soil, the deep fertilization assembly comprises a fertilizer container having a dispenser with a dosing wheel arranged in the bottom section, two delivery pipes emanating from the container, a turbine fan that delivers a pressurised air via a pipe to a delivery pipe to increase the pressure of the fertilizer in the delivery pipe, a cogwheel that is pivotally mounted on the cantilever to measure the speed of the tractor attachment, a fertilizer container having a dispenser with a dosing wheel arranged in the bottom section, two delivery pipes emanating from the container, a turbine fan that delivers a pressurised air via a pipe to a delivery pipe to increase the pressure of the fertilizer in the delivery pipe, a cogwheel that is pivotally mounted on the cantilever to measure the speed of the tractor attachment, the dosing wheel is a double helical worm, whose form allows a precise amount of fertilizer to be dosed, wherein the double helical worm is driven by an electric motor controlled by a control device.