In one embodiment, a hopper spreader apparatus for spreading granular material is provided. The hopper spreader apparatus includes a hopper, a spreading unit, and a dispensing unit. The hopper has a storage cavity for storing the granular material to be spread. The spreading unit spreads the granular material. The dispensing system transports the granular material from the hopper to the spreading unit. The dispensing system includes a conveying unit and a rotating first roll. The conveying unit conveys the granular material toward the spreading unit. The rotating first roll controls a flow of granular material from the hopper to the conveying unit. The use of the rotating roll allows for control of high flow material (such as for example dry salt) while allowing for improved collapse and break-up of low flow material (such as for example wetted sand).

A nutrient injection assembly includes a housing having an intermediate wall, an agricultural chamber wall, and a mixing chamber wall. The intermediate wall and a first set of the plurality of distal walls define a nutrient and peristaltic pump chamber, the first set of the plurality of distal walls, the intermediate wall, and the agricultural chamber wall define an agricultural control chamber, and a second set of the plurality of distal walls, the agricultural chamber wall, and the mixing chamber wall define a mixing chamber. The nutrient injection assembly includes a mixing reservoir. The nutrient injection assembly includes an agricultural control system comprising a controller, where the controller is disposed within the agricultural control chamber. The nutrient injection assembly includes one or more output control solenoids configured to independently provide a solution to a plurality of output zones of the agricultural environment.

A nutrient injection assembly includes a housing having an intermediate wall, an agricultural chamber wall, and a mixing chamber wall. The intermediate wall and a first set of the plurality of distal walls define a nutrient and peristaltic pump chamber, the first set of the plurality of distal walls, the intermediate wall, and the agricultural chamber wall define an agricultural control chamber, and a second set of the plurality of distal walls, the agricultural chamber wall, and the mixing chamber wall define a mixing chamber. The nutrient injection assembly includes a mixing reservoir. The nutrient injection assembly includes an agricultural control system comprising a controller, where the controller is disposed within the agricultural control chamber. The nutrient injection assembly includes one or more output control solenoids configured to independently provide a solution to a plurality of output zones of the agricultural environment.