Seeder with metering system having selectively powered metering sections

1. An agricultural air cart comprising:

a tank configured to contain particulate;

a plurality of particulate-transporting lines;

a metering system including a plurality of particulate metering sections,

each particulate metering section of said plurality of particulate metering sections being operably positioned between said tank and a respective particulate-transporting line of said particulate-transporting lines so as to control dispensation of the particulate from said tank to said respective particulate-transporting line;

an airflow generator in communication with said particulate-transporting lines so as to generate respective pneumatic-conveying airstreams within said particulate-transporting lines; and

a plurality of damper assemblies, each of which is positioned along a respective particulate-transporting line of said particulate-transporting lines downstream relative to said metering system and selectively located at least in part within the respective airstream to restrict airflow within said respective particulate-transporting line responsive to variations in metering of particulate to said respective particulate-transporting line.

2. The agricultural air cart of claim 1 ,

each of said damper assemblies being shiftable between an engaged configuration and a disengaged configuration,

said engaged configuration corresponding to at least partially obstructed airflow within said respective particulate-transporting line,

said disengaged configuration corresponding to at least substantially unobstructed airflow within said respective particulate-transporting line, and

each of said damper assemblies being operably coupled with a respective one of said particulate metering sections so that said damper assembly is shifted to said engaged configuration when particulate dispensation is stopped and said damper assembly is shifted into said disengaged configuration when particulate is dispensed.

3. The agricultural air cart of claim 2 ,

each of said damper assemblies comprising a flap movably mounted within said respective particulate-transporting line,

said flap being moved out of the airflow within said respective particulate-transporting line when said damper assembly is in said disengaged configuration, and

said flap being moved into the airflow within said respective particulate-transporting line when said damper assembly is in said engaged configuration.

4. The agricultural air cart of claim 3 ,

said flap being variably movable within said respective particulate-transporting line so that the extent to which airflow is obstructed by said flap is variable.

5. The agricultural air cart of claim 3 ,

each of said damper assemblies further comprising a damper actuator to effect moving of said flap into and out of the airflow within said respective particulate-transporting line, and

each of said damper actuators being operably coupled with a respective one of said particulate metering sections so that said damper actuator moves said flap into the airflows when particulate dispensation is stopped and said damper actuator moves said flap out of the airflow when particulate is dispensed.

6. The agricultural air cart of claim 5 ,

each of said particulate metering sections comprising a metering device actuator,

said metering device actuator being operable to permit or stop dispensation of particulate by said particulate metering section, and

each of said damper actuators being operably coupled with a respective one of said metering device actuators.

7. The agricultural air cart of claim 6 ,

each of said damper actuators comprising a damper hydraulic cylinder,

each of said metering device actuators comprising a metering device hydraulic cylinder; and

a hydraulic system operably coupled to each said damper hydraulic cylinder and each said metering device hydraulic cylinder, with each said damper hydraulic cylinder being fluidly coupled with a respective one of said metering device hydraulic cylinders so that both are controlled simultaneously by said hydraulic system.

8. The agricultural air cart of claim 5 ,

said flap being variably movable within said respective particulate-transporting line so that the extent to which airflow is obstructed by said flap is variable.

9. The agricultural air cart of claim 1 ,

each particulate metering section of said plurality of particulate metering sections comprising a shiftable gate in communication with said tank, with shifting of said shiftable gate controlling particulate dispensation.