Residue monitoring and residue-based control

1. An agricultural machine comprising:

a set of ground engaging elements configured to perform a ground engaging operation as the agricultural machine travels in a travel direction;

a controllable subsystem configured to control the set of ground engaging elements to perform the ground engaging application;

a rearward sensor mounted to the agricultural machine, the rearward sensor configured to sense an area of ground behind the agricultural machine, relative to the travel direction, and to generate a rearward sensor signal;

one or more processors; and

a memory that stores computer executable instructions that, when executed by the one or more processors, configure the one or more processors to:

determine a first zone and a second zone, wherein the first zone and the second zone represent different portions of the area of ground behind the agricultural machine;

receive the rearward sensor signal and determine a first residue metric indicative of the amount of residue in the first zone; and

control the controllable subsystem so the set of ground engaging elements perform the ground engaging operation on the area of ground based on the first residue metric.

2. The agricultural machine of claim 1 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to determine a second residue metric indicative of the amount of residue in the second zone and to control the controllable subsystem so the set of ground engaging elements perform the ground engaging operation based at least in part on the second residue metric.

3. The agricultural machine of claim 2 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to:

compare the first residue metric to the second residue metric and to generate a rearward uniformity metric indicative of the comparison between the first residue metric and the second residue metric; and

control the controllable subsystem so the set of ground engaging elements perform the ground engaging operation based at least in part on the rearward uniformity metric.

4. The agricultural machine of claim 3 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to control the controllable subsystem so the set of ground engaging elements perform the ground engaging operation to increase residue uniformity rearward of the agricultural machine.

5. The agricultural machine of claim 1 , further comprising:

a forward sensor mounted to the agricultural machine, the forward sensor configured to sense a forward area of ground in front of the agricultural machine, relative to the travel direction, and to generate a forward sensor signal;

wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to:

determine a third zone and a fourth zone, wherein the third zone and the fourth zone represent different portions of the area of ground in front of the agricultural machine, wherein the portion of the area of ground that is in the third zone when located in the forward area comprises at least a portion of the area of ground that is in the first zone when located rearward of the agricultural machine and wherein the portion of the area of ground that is in the fourth zone when located in the forward area comprises at least a portion of the area of ground that is in the second zone when located rearward of the agricultural machine;

receive the forward sensor signal and determine a third residue metric indicative of the amount of residue in the third zone; and

control the controllable subsystem so the set of ground engaging elements perform the ground engaging operation based at least in part on the third residue metric.

6. The agricultural machine of claim 5 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to determine a fourth residue metric indicative of the amount of residue in the fourth zone and to control the controllable subsystem so the set of ground engaging elements perform the ground engaging operation based at least in part on the fourth residue metric.

7. The agricultural machine of claim 5 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to:

compare the third residue metric to the fourth residue metric and to generate a forward uniformity metric; and

control the controllable subsystem so the set of ground-engaging elements perform the ground engaging operation based at least in part on the forward uniformity metric.

8. The agricultural machine of claim 5 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to:

compare the first reside metric to the third residue metric and generate an operation effect metric; and

control the controllable subsystem so the set of ground-engaging elements perform the ground engaging operation based at least in part on the operation effect metric.

9. The agricultural machine of claim 1 , further comprising:

a location sensor configured to sense a location of the agricultural machine and to generate a location signal indicative of the location of the agricultural machine: and

wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to receive the location signal and to generate a map entry indicative of a location of the agricultural machine and the first residue metric.

10. The agricultural machine of claim 1 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to:

monitor and store, over time, the first residue metric and generate a historic residue metric;

compare a current first residue metric with the historic residue metric and generate a historic comparison metric indicative of the comparison; and

control the controllable subsystem so the set of ground engaging elements perform the ground engaging operation based at least in part on the historic comparison metric.

11. The agricultural machine of claim 1 , wherein the computer executable instructions, when executed by the one or more processors, further configure the one or more processors to:

receive the first residue metric, determine an error and generate an alert to an operator that is indicative of the error.

12. The agricultural machine of claim 1 , further comprising:

a user interface mechanism operably coupled to the one or more processors, the user interface mechanism actuatable to change the portions of the area of ground behind the agricultural machine represented by the first zone.

13. The agricultural machine of claim 1 , wherein the computer executable instructions, when executed by the one or more processors, configure the one or more processors to control the controllable subsystem to adjust an angle of one of the ground engaging elements.

14. The agricultural machine of claim 1 , wherein the computer executable instructions, when executed by the one or more processors, configure the one or more processors to control the controllable subsystem to adjust a depth of one of the ground engaging elements.

15. A method performed by an agricultural machine that performs a ground engaging operation when traveling in a travel direction, the method comprising:

generating a first rearward zone signal that is indicative of, as a first rearward zone, a first portion of ground rearward of the agriculture machine relative to the travel direction;

sensing, with a rearward sensor, an amount of reside in the first rearward zone;

generating, with the rearward sensor, a first sensor signal indicative of the amount of residue in the first rearward zone; and

receiving the first sensor signal and generating a first residue metric indicative of the amount of residue in the first rearward zone; and

controlling a set of ground engaging elements to perform the ground engaging operation based on the first residue metric.

16. The method of claim 15 , further comprising:

generating a second rearward zone that is indicative of, as a second rearward zone, a second portion of ground rearward of the agriculture machine relative to the travel direction;

sensing, with a rearward sensor, an amount of reside in the second rearward zone;

generating, with the rearward sensor, a second sensor signal indicative of the amount of residue in the second rearward zone;

receiving the second sensor signal and generating a second residue metric indicative of the amount of residue in the second rearward zone; and

wherein controlling the set of ground engaging elements is based at least in part on the second residue metric.

17. The method of claim 16 , further comprising:

determining a difference between the first residue metric and the second residue metric;

generating a difference metric indicative of the difference between the first residue metric and the second residue metric; and

wherein controlling the set of ground engaging elements is based at least in part on the difference metric indicative of the difference between the first residue metric and the second residue metric.

18. The method of claim 17 , further comprising:

generating a first forward zone that is indicative of, as a first forward zone, a first portion of ground forward of the agriculture machine;

sensing, with a forward sensor, an amount of reside in the first forward zone;

generating, with the forward sensor, a third sensor signal indicative of the amount of residue in the first forward zone;

receiving the third sensor signal and generating a third residue metric indicative of the amount of residue in the first forward zone;

determining a difference between the first residue metric and the third residue metric;

generating a difference metric indicative of the difference between the first residue metric and the third residue metric; and

wherein controlling the set of ground engaging elements is based at least in part on the difference metric indicative of the difference between the first residue metric and the third residue metric.

19. The method of claim 15 , wherein controlling the set of ground engaging elements comprises:

generating a control signal indicative of an angle change of a ground engaging element; and

sending the control signal to an actuator of the ground engaging element.

20. An agricultural machine comprising:

a set of ground engaging elements;

a forward sensor configured to sense a forward area that is forward of the agricultural machine;

a rearward sensor configured to sense a rearward area that is rearward of the agricultural machine;

one or more processors; and

a memory that stores computer executable instructions that, when executed by the one or more processors, configure the one or more processors to:

generate a plurality of forward zones and a plurality of rearward zones, each forward zone corresponding to at least one rearward zone;

receive a forward sensor signal from the forward sensor;

determine an amount of residue in each of the plurality of forward zones based on the forward sensor signal;

generate a plurality of forward residue metrics, each forward residue metric indicative of the amount of residue in one of the plurality of forward zones;

receive a rearward sensor signal from the rearward sensor;

determine an amount of residue in each of the plurality of rearward zones based on the rearward sensor signal:

generate a plurality of rearward residue metrics, each rearward residue metric indicative of the amount of residue in one of the plurality of rearward zones;

compare two or more zones from the plurality of rearward zones and the plurality of forward zones;

generate a comparison metric indicative of the comparison; and

control at least one of the ground engaging elements in the set of ground engaging elements based on the comparison metric.