Device and method for detecting microorganisms in sugarcane planting soil

Abstract

The invention relates to the technical field of soil microorganism detection, in particular to sugarcane planting soil microorganism detection equipment and method.The sugarcane planting soil microorganism detection equipment comprises a base, a moving mechanism, a supporting frame, a driving mechanism, a sampling box, a soil rotating screw, a sampling drill bit, a conveying box and a detection box; the detection equipment can be moved to a specified position, then through vertical movement and horizontal rotation of the sampling drill bit, the sampling drill bit can drill soil at different depths, the soil is conveyed into the sampling box through the soil rotating screw, sampling of the soil at the different depths is achieved, and after sampling, the soil at the different depths can be taken out through the soil rotating screw. According to the soil detection device, soil in the sampling box is conveyed into the detection box through the conveying box, so that the sampled soil can be detected, the soil can be detected without manually transferring the soil, and the detection efficiency of soil detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil microorganism detection, and in particular to a device and method for detecting soil microorganisms in sugarcane planting. Background Art

[0002] During the sugarcane planting process, it is necessary to frequently test the soil microorganisms in the planting area. When testing the soil microorganisms, the soil needs to be dug and then tested by a detection device. At present, when sampling the soil, most of the time, only the surface of the soil can be sampled, and the soil at different depths cannot be sampled, which leads to inaccurate test results for soil microorganisms.

[0003] Prior art CN213633416U discloses a microbial soil detection device, which drives a drill bit below to rotate by an electric motor. The downward rotation of the drill bit can drive the support column as a whole to move downward below the ground. When the support column reaches a certain depth, the telescopic rod works and extends outward, thereby driving the outer collection cylinder to move outward to collect the soil, thereby being able to collect soil at different depths, thereby improving the accuracy of the detection results of soil microorganisms.

[0004] However, the above-mentioned soil detection device can only sample the soil, but cannot detect the microorganisms in the sampled soil at the same time, so that after sampling, the sample needs to be transferred to the detection equipment before the soil can be tested, thereby reducing the detection efficiency of the soil detection. Summary of the invention

[0005] The purpose of the present invention is to provide a sugarcane planting soil microorganism detection device and method, which solves the technical problem that the existing soil detection device can only sample the soil but cannot simultaneously detect the microorganisms in the sampled soil, so that after sampling, the sample needs to be transferred to the detection device before the soil can be detected, thereby reducing the detection efficiency of the soil.

[0006] To achieve the above-mentioned purpose, the present invention provides a sugarcane planting soil microorganism detection device, including a base, and also including a moving mechanism, a support frame, a driving mechanism, a sampling box, a soil auger, a sampling drill bit, a transmission box and a detection box, the moving mechanism is used to move the base, the support frame is arranged on the base, the driving mechanism is used to move the sampling box up and down or horizontally rotate the sampling box, the sampling box is located in the support frame and passes through the base, the soil auger is arranged outside the sampling box, the sampling drill bit is arranged below the sampling box, the sampling box has a hollow structure inside, the transmission box is connected to the sampling box and is located outside the sampling box, and the detection box is connected to the transmission box and is located below the transmission box.

[0007] Wherein, the moving mechanism includes a shock absorbing member and a universal wheel, wherein the shock absorbing member is used to perform shock absorption and buffering on the base, and the universal wheel is arranged on a side of the shock absorbing member away from the base to drive the base to move.

[0008] Wherein, the shock absorber includes a fixed block, a connecting spring and a movable block, the fixed block is arranged below the base, the connecting spring is arranged inside the fixed block, and the movable block is arranged below the connecting spring and located inside the fixed block.

[0009] Among them, the driving mechanism includes a hydraulic telescopic rod, a movable plate and a driving motor. The hydraulic telescopic rod is arranged on the support frame and passes through the support frame. The movable plate is connected to the output end of the hydraulic telescopic rod and is located at the lower end of the hydraulic telescopic rod. The driving motor is arranged on the movable plate. The output shaft of the driving motor is connected to the sampling box and passes through the movable plate.

[0010] Wherein, the driving mechanism further includes a limiting rod, the limiting rod is arranged between the base and the supporting frame, and the limiting rod passes through the movable plate.

[0011] There are several slots distributed on the sampling box, and the soil spiral carries the sampled soil from the slots into the sampling box.

[0012] The present invention also provides a method for detecting microorganisms in sugarcane planting soil, comprising the following steps:

[0013] Hold the handle outside the support frame and push the handle to move, thereby driving the universal wheel to move in all directions on the ground, such as front, back, left, and right, to achieve the movement of the detection device;

[0014] When the detection device moves to the designated position, the sampling drill bit is moved downward, and the sampling drill bit is rotated while moving downward, so that the sampling drill bit samples the soil at different depths;

[0015] After sampling, the soil moves along with the soil auger and enters the sampling box, and then the soil is transferred to the transfer box by the conveying auger;

[0016] When the soil reaches the transmission box, the soil is transmitted to the right side of the transmission box by the transmission screw, and finally falls into the detection box;

[0017] The microorganisms in the soil are detected and analyzed in the detection box, and a detection report is output after the analysis, thereby completing the entire sampling and detection process of the soil microorganisms.

[0018] The present invention discloses a soil microorganism detection device and method for sugarcane planting. The mobile mechanism drives the base to move in all directions on the ground, such that the detection device can be moved to a designated position. The sampling drill bit can then move up and down and rotate horizontally, so that the sampling drill bit can drill soil at different depths and transmit the soil to the sampling box through the soil spiral to achieve sampling of soil at different depths. After sampling, the soil in the sampling box is transmitted to the detection box through the transmission box, so that the microorganism content in the sampled soil can be detected. Therefore, the soil can be detected without manually transferring the sampled soil to the detection device, thereby improving the detection efficiency of the soil detection, and solving the problem that the existing soil detection device can only sample the soil but cannot simultaneously detect the microorganisms in the sampled soil, so that the sample needs to be transferred to the detection device after sampling in order to detect the soil, thereby reducing the detection efficiency of the soil detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0020] Figure 1 It is a schematic diagram of the overall structure of the sugarcane planting soil microorganism detection device according to the first embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the connection between the transmission box and the detection box according to the first embodiment of the present invention.

[0022] Figure 3 It is a cross-sectional schematic diagram along the connecting spring of the first embodiment of the present invention.

[0023] Figure 4 1 is a schematic cross-sectional view along the transmission rod of the first embodiment of the present invention.

[0024] Figure 5 1 is a flowchart of a method for detecting microorganisms in soil for sugarcane planting according to a second embodiment of the present invention.

[0025] In the figure: 101-base, 102-support frame, 103-sampling box, 104-soil spiral, 105-sampling drill bit, 106-transmission box, 107-detection box, 108-universal wheel, 109-fixed block, 110-connecting spring, 111-movable block, 112-hydraulic telescopic rod, 113-movable plate, 114-driving motor, 115-limiting rod, 116-slotting, 117-first motor, 118-rotating rod, 119-conveying spiral, 120-second motor, 121-transmission rod, 122-transmission spiral, 123-through hole. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0027] First embodiment:

[0028] See also Figures 1 to 4 The present invention provides a sugarcane planting soil microorganism detection device, including a base 101, a moving mechanism, a support frame 102, a driving mechanism, a sampling box 103, a soil screw 104, a sampling drill bit 105, a transmission box 106 and a detection box 107, the moving mechanism includes a shock absorber and a universal wheel 108, the shock absorber includes a fixed block 109, a connecting spring 110 and a movable block 111, and the driving mechanism includes a hydraulic telescopic rod 112, a movable plate 113, a driving motor 114 and a limiting rod 115.

[0029] In this embodiment, the base 101 is driven by the moving mechanism to move in various directions on the ground, such that the detection device can be moved to a specified position, and then the sampling drill bit 105 is moved up and down and rotated horizontally, so that the sampling drill bit 105 can drill the soil at different depths, and transfer the soil to the sampling box 103 through the soil spiral 104, so as to achieve sampling of soil at different depths. After sampling, the soil in the sampling box 103 is transferred to the detection box 107 through the transmission box 106, so that the microbial content in the sampled soil can be detected, and the soil can be detected without manually transferring the sampled soil to the detection device, thereby improving the detection efficiency of the soil detection, and solving the problem that the existing soil detection device can only sample the soil but cannot simultaneously detect the microorganisms in the sampled soil, so that after sampling, the sample needs to be transferred to the detection device for detection, thereby reducing the detection efficiency of the soil detection.

[0030] Among them, the moving mechanism is used to move the base 101, the support frame 102 is arranged on the base 101, the driving mechanism is used to move up and down or horizontally rotate the sampling box 103, the sampling box 103 is located in the support frame 102 and passes through the base 101, the soil spiral 104 is arranged outside the sampling box 103, the sampling drill bit 105 is arranged below the sampling box 103, the interior of the sampling box 103 is a hollow structure, the transmission box 106 is connected to the sampling box 103 and is located outside the sampling box 103, the detection box 107 is connected to the transmission box 106 and is located below the transmission box 106, the shape of the support frame 102 is U-shaped, and the sampling The interior of the box 103 is a hollow structure, and the sampling box 103 can rotate horizontally and move up and down in the support frame 102, thereby driving the soil auger 104 and the sampling drill bit 105 to rotate horizontally and move up and down in the support frame 102. Through the horizontal rotation and up and down movement of the soil auger 104 and the sampling drill bit 105 in the support frame 102, the sampling drill bit 105 can drill the soil at different depths and transfer the soil to the sampling box 103 through the soil auger 104. The sampling box 103, the transmission box 106 and the detection box 107 are connected, so that the soil in the sampling box 103 can be transferred to the detection box 107 through the transmission box 106.

[0031] Secondly, the shock absorber is used to perform shock absorption and buffering on the base 101. The universal wheel 108 is arranged on the side of the shock absorber away from the base 101, and is used to drive the base 101 to move. The fixed block 109 is arranged below the base 101, and the connecting spring 110 is arranged in the fixed block 109. The movable block 111 is arranged below the connecting spring 110 and is located in the fixed block 109. The fixed block 109 is a structure with an opening at the lower end and a hollow interior. The movable block 111 and the connecting spring 110 are both located in the fixed block 109. The connecting spring 110 is provided with a damper, so that when the connecting spring 110 shakes, the damper on the connecting spring 110 will generate a damping force to prevent the connecting spring 110 from shaking, thereby causing the shaking of the connecting spring 110 to eventually stop and will not keep shaking. When the movable block 111 is on the fixed block 10 9, the connecting spring 110 will expand and contract in the fixed block 109. Since the connecting spring 110 has a self-restoring effect, when the expansion and contraction force on the connecting spring 110 disappears, the connecting spring 110 will drive the movable block 111 to move in the fixed block 109 in the direction of restoring to the original position, so that the connecting spring 110 will buffer the up and down movement of the movable block 111 in the fixed block 109. The universal wheel 108 has a brake element. When the detection equipment needs to be fixed, the brake element on the universal wheel 108 at the corresponding position is stepped on, so that the universal wheel 108 is fixed, and then the base 101 is fixed. The universal wheel 108 can move in various directions on the ground, front, back, left, and right, through the horizontal rotation and vertical rotation of the universal wheel 108 under the base 101.

[0032] Again, the hydraulic telescopic rod 112 is arranged on the support frame 102 and passes through the support frame 102. The movable plate 113 is connected to the output end of the hydraulic telescopic rod 112 and is located at the lower end of the hydraulic telescopic rod 112. The driving motor 114 is arranged on the movable plate 113. The output shaft of the driving motor 114 is connected to the sampling box 103. The output shaft of the driving motor 114 passes through the movable plate 113. The limiting rod 115 is arranged between the base 101 and the support frame 102. The limiting rod 115 passes through the movable plate 113. The output end of the hydraulic telescopic rod 112 is connected to the movable plate 113, and drives the movable plate 113 to move up and down outside the limit rod 115, thereby driving the sampling box 103 to move up and down in the support frame 102. At this time, the limit rod 115 can limit the up and down movement position of the movable plate 113 to avoid the movable plate 113 from offset during the up and down movement. The output shaft of the drive motor 114 is connected to the sampling box 103, and drives the sampling box 103 to rotate in the support frame 102 along the axis of the output shaft of the drive motor 114.

[0033] Meanwhile, a plurality of slots 116 are distributed on the sampling box 103 , and the soil auger 104 carries the sampled soil into the sampling box 103 through the slots 116 .

[0034] In addition, a first motor 117, a rotating rod 118 and a conveying screw 119 are provided in the sampling box 103. The rotating rod 118 is connected to the output end of the first motor 117 and is located below the first motor 117. The conveying screw 119 is arranged outside the rotating rod 118. The output end of the first motor 117 is connected to the rotating rod 118, and drives the rotating rod 118 to rotate along the axis of the rotating rod 118 in the sampling box 103, thereby driving the conveying screw 119 to rotate along the axis of the rotating rod 118 in the sampling box 103.

[0035] Finally, a second motor 120, a transmission rod 121 and a transmission screw 122 are provided in the transmission box 106. The transmission rod 121 is connected to the output end of the second motor 120 and is located on the side of the second motor 120 close to the first motor 117. The transmission screw 122 is arranged outside the transmission rod 121. The output end of the second motor 120 is connected to the transmission rod 121 and drives the transmission rod 121 to rotate along the axis of the transmission rod 121 in the transmission box 106, thereby driving the transmission screw 122 to rotate along the axis of the transmission rod 121 in the transmission box 106.

[0036] When using a sugarcane planting soil microorganism detection device of the present embodiment, the handle outside the support frame 102 is held and pushed to move the handle outside the support frame 102, so that the universal wheel 108 can drive the base 101 to move in all directions above the ground, front and back, left and right, and then the detection device can be moved to a specified position. When the universal wheel 108 is hit or encounters a pothole during movement, the universal wheel 108 will be impacted and shake up and down, thereby driving the movable block 111 to move up and down in the fixed block 109. The movable block 111 moves up and down in the fixed block 109, thereby driving the connecting spring 110 to expand and contract in the fixed block 109. Since the connecting spring 110 It has a self-recovery effect, so that the connecting spring 110 can buffer the up and down movement of the movable block 111 in the fixed block 109, and then the connecting spring 110 can buffer the up and down movement of the base 101, so as to avoid that the electrical components in the detection equipment follow the up and down movement of the base 101 and cause the electrical components in the detection equipment to be damaged. When the detection equipment is moved to a specified position, the brake device on the universal wheel 108 at the corresponding position is stepped on, so that the universal wheel 108 is fixed on the ground, so that the base 101 is fixed above the ground, completing the entire moving process of the detection equipment, and by moving the base 101, the entire detection equipment can be moved, so as to move the detection equipment to a specified position.

[0037] When the detection device moves to the specified position, the drive motor 114 is started, so that the power output by the output shaft of the drive motor 114 drives the sampling box 103 to rotate along its own axis under the movable plate 113, thereby driving the soil screw 104 and the sampling drill bit 105 to rotate along the axis of the sampling box 103 under the movable plate 113. While the sampling box 103 is rotating, the hydraulic telescopic rod 112 is started, so that the power output by the output end of the hydraulic telescopic rod 112 drives the movable plate 113 to rotate along the axis of the sampling box 103. The movable plate 113 moves up and down outside the limiting rod 115, thereby driving the sampling box 103 to move up and down in the support frame 102, and further driving the soil rotating screw 104 and the sampling drill bit 105 to move up and down in the support frame 102. First, the sampling drill bit 105 passes through the through hole 123, and then the sampling drill bit 105 drills the soil at different depths, and transfers the soil from the slot 116 to the sampling box 103 through the soil rotating screw 104, so as to sample the soil at different depths.

[0038] After the sampling is completed, the first motor 117 and the second motor 120 are started at the same time. By starting the first motor 117, the power output from the output end of the first motor 117 drives the rotating rod 118 to rotate along the axis of the rotating rod 118 in the sampling box 103, thereby driving the conveying screw 119 to rotate along the axis of the rotating rod 118 in the sampling box 103, and then the soil at the bottom of the sampling box 103 can be transferred to the top of the sampling box 103. By starting the second motor 120, the power output from the output end of the second motor 120 drives the conveying screw 119 to rotate along the axis of the rotating rod 118 in the sampling box 103. The transmission rod 121 rotates along the axis of the transmission rod 121 in the transmission box 106, thereby driving the transmission screw 122 to rotate along the axis of the transmission rod 121 in the transmission box 106, and then the soil on the top of the sampling box 103 can be gradually transferred to the transmission box 106, and the soil entering the transmission box 106 can be transferred from left to right to the right side of the transmission box 106, and finally fall into the detection box 107, and the microbial content in the soil is detected and analyzed in the detection box 107, and a detection report is output after analysis, completing the entire sampling and detection process of soil microorganisms.

[0039] Second embodiment:

[0040] Based on the first embodiment, please refer to Figure 5 The present invention also provides a method for detecting microorganisms in sugarcane planting soil, comprising the following steps:

[0041] S101 , holding the handle outside the support frame 102 and pushing the handle to move, thereby driving the universal wheel 108 to move in various directions such as front, back, left, and right on the ground, so as to realize the movement of the detection device.

[0042] Specifically, the handle outside the support frame 102 is held and pushed to move, so that the universal wheel 108 can drive the base 101 to move in various directions above the ground, front, back, left, and right, and then the detection equipment can be moved to a specified position. When the universal wheel 108 is hit or encounters a pothole during movement, the universal wheel 108 will be impacted and shake up and down, thereby driving the movable block 111 to move up and down in the fixed block 109. The movable block 111 moves up and down in the fixed block 109, thereby driving the connecting spring 110 to retract and retract in the fixed block 109. Since the connecting spring 110 has a self-recovery effect, The connecting spring 110 can buffer the up and down movement of the movable block 111 in the fixed block 109, and further the connecting spring 110 can buffer the up and down movement of the base 101, so as to avoid that the electrical components in the detection device follow the up and down movement of the base 101 and cause the electrical components in the detection device to be damaged. When the detection device is moved to a specified position, the brake device on the universal wheel 108 at the corresponding position is stepped on, so that the universal wheel 108 is fixed on the ground, so that the base 101 is fixed above the ground, completing the entire moving process of the detection device. By moving the base 101, the entire detection device can be moved, so as to move the detection device to a specified position.

[0043] S102, when the detection device moves to the designated position, the sampling drill bit 105 is moved downward, and the sampling drill bit 105 is rotated while moving downward, so that the sampling drill bit 105 samples the soil at different depths.

[0044] Specifically, when the detection device moves to the specified position, the drive motor 114 is started, so that the power output by the output shaft of the drive motor 114 drives the sampling box 103 to rotate along its own axis below the movable plate 113, thereby driving the soil screw 104 and the sampling drill bit 105 to rotate along the axis of the sampling box 103 below the movable plate 113. While the sampling box 103 is rotating, the hydraulic telescopic rod 112 is started, so that the power output by the output end of the hydraulic telescopic rod 112 drives the sampling box 103 to rotate along its own axis. The movable plate 113 moves up and down outside the limiting rod 115, thereby driving the sampling box 103 to move up and down in the support frame 102, and further driving the soil auger 104 and the sampling drill bit 105 to move up and down in the support frame 102. First, the sampling drill bit 105 passes through the through hole 123, and then the sampling drill bit 105 drills the soil at different depths, and transfers the soil from the slot 116 to the sampling box 103 through the soil auger 104, so as to achieve sampling of the soil at different depths.

[0045] S103, after sampling, the soil will move along with the soil auger 104 and enter the sampling box 103, and then the soil will be transferred to the transfer box 106 through the conveying screw 119.

[0046] Specifically, after the sampling is completed, the first motor 117 and the second motor 120 are started at the same time. By starting the first motor 117, the power output from the output end of the first motor 117 drives the rotating rod 118 to rotate along the axis of the rotating rod 118 in the sampling box 103, thereby driving the conveying screw 119 to rotate along the axis of the rotating rod 118 in the sampling box 103, and then the soil at the bottom of the sampling box 103 can be transferred to the top of the sampling box 103.

[0047] S104 , when the soil reaches the transmission box 106 , the soil is transmitted to the right side of the transmission box 106 by the transmission screw 122 , and finally falls into the detection box 107 .

[0048] Specifically, by starting the second motor 120, the power output from the output end of the second motor 120 drives the transmission rod 121 to rotate along the axis of the transmission rod 121 in the transmission box 106, thereby driving the transmission screw 122 to rotate along the axis of the transmission rod 121 in the transmission box 106, and then the soil on the top of the sampling box 103 can be gradually transferred to the transmission box 106, and the soil entering the transmission box 106 can be transferred from left to right to the right side of the transmission box 106, and finally falls into the detection box 107.

[0049] S105, detecting and analyzing the microorganisms in the soil in the detection box 107, and outputting a detection report after the analysis, thereby completing the entire sampling and detection process of the soil microorganisms.

[0050] Specifically, the detection box 107 detects and analyzes the content of microorganisms in the soil that have fallen into the detection box 107, and outputs a detection report after the detection and analysis, thereby completing the entire sampling and detection process of soil microorganisms.

[0051] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A sugarcane planting soil microorganism detection device, comprising a base, characterized in that: It also includes a moving mechanism, a support frame, a driving mechanism, a sampling box, a soil auger, a sampling drill bit, a transmission box and a detection box, the moving mechanism is used to move the base, the support frame is arranged on the base, the driving mechanism is used to move the sampling box up and down or horizontally rotate the sampling box, the sampling box is located in the support frame and passes through the base, the soil auger is arranged outside the sampling box, the sampling drill bit is arranged below the sampling box, the interior of the sampling box is a hollow structure, the transmission box is connected to the sampling box and is located outside the sampling box, and the detection box is connected to the transmission box and is located below the transmission box.

2. The sugarcane planting soil microorganism detection device according to claim 1, characterized in that: The moving mechanism comprises a shock absorbing member and a universal wheel. The shock absorbing member is used for shock absorbing and buffering the base. The universal wheel is arranged on a side of the shock absorbing member away from the base and is used for driving the base to move.

3. The sugarcane planting soil microorganism detection device according to claim 2, characterized in that: The shock absorbing member comprises a fixed block, a connecting spring and a movable block, wherein the fixed block is arranged below the base, the connecting spring is arranged inside the fixed block, and the movable block is arranged below the connecting spring and located inside the fixed block.

4. The sugarcane planting soil microorganism detection device according to claim 1, characterized in that: The driving mechanism includes a hydraulic telescopic rod, a movable plate and a driving motor. The hydraulic telescopic rod is arranged on the support frame and passes through the support frame. The movable plate is connected to the output end of the hydraulic telescopic rod and is located at the lower end of the hydraulic telescopic rod. The driving motor is arranged on the movable plate. The output shaft of the driving motor is connected to the sampling box and passes through the movable plate.

5. The sugarcane planting soil microorganism detection device according to claim 4, characterized in that: The driving mechanism further comprises a limiting rod, wherein the limiting rod is arranged between the base and the supporting frame, and the limiting rod passes through the movable plate.

6. The sugarcane planting soil microorganism detection device according to claim 1, characterized in that: The sampling box is provided with a plurality of slots, and the soil spiral carries the sampled soil into the sampling box through the slots.

7. A method for detecting microorganisms in soil for sugarcane planting, applied to the device for detecting microorganisms in soil for sugarcane planting as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Hold the handle outside the support frame and push the handle to move, thereby driving the universal wheel to move in all directions on the ground, such as front, back, left, and right, to achieve the movement of the detection device; When the detection device moves to the designated position, the sampling drill bit is moved downward, and the sampling drill bit is rotated while moving downward, so that the sampling drill bit samples the soil at different depths; After sampling, the soil moves along with the soil auger and enters the sampling box, and then the soil is transferred to the transfer box by the conveying auger; When the soil reaches the transmission box, the soil is transmitted to the right side of the transmission box by the transmission screw, and finally falls into the detection box; The microorganisms in the soil are detected and analyzed in the detection box, and a detection report is output after the analysis, thereby completing the entire sampling and detection process of the soil microorganisms.

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