EFFECTIVE ROOT ZONE USE IN CROP MANAGEMENT
Embodiments of the present disclosure relate generally to nutrient monitoring in an agricultural field, and more specifically to systems, devices, and methods for tracking the fate and transport of nitrogen in agricultural environments and for determining an effective root zone of a crop.
1 . A method of determining an effective root zone for a crop in an agricultural monitoring system, wherein the agricultural monitoring system comprises (a) a data management system hosted on a server and (b) a monitoring device associated with at least one sensor and at least partially located within soil, the monitoring device being adapted to measure a moisture level of the soil at a plurality of different depths, the monitoring device also being adapted to wirelessly transmit data representative of the moisture level of the soil at the plurality of different depths, the method comprising the following steps performed by the data management system:
receiving data from the monitoring device, wherein the data is representative of the moisture level of the soil at each of the plurality of different depths;
determining, for each of the plurality of different depths and based on the received data, whether each of a plurality of incremental changes in soil moisture is relevant for root uptake;
determining whether each of the plurality of incremental changes in soil moisture determined to be relevant for root uptake are due to drainage;
determining, for each of the plurality of different depths, whether root uptake occurs based at least on those incremental changes in soil moisture occurring at that particular depth that are not due to drainage;
determining an amount of root uptake for each of the plurality of different depths where root uptake occurs; and
using at least the determined amounts of root uptake and a predetermined effective root zone criteria, determining an effective root zone for the crop.
2 . The method of claim 1 , further comprising determining a nitrogen level for the soil based on the effective root zone for the crop.
3 . The method of claim 2 , wherein the nitrogen level is a level of any one or more of: nitrate, nitrite, ammonium, inorganic nitrogen, organic nitrogen, gaseous nitrogen or nitrogen bound to soil.
4 . The method of claim 2 , further comprising outputting (a) a command for modifying the nitrogen level to a control panel of an irrigation pump station or (b) a data message about the nitrogen level to a user device having a graphical user interface.
5 . The method of claim 4 , further comprising establishing a communications path with the irrigation pump station prior to outputting the command to the control panel of the irrigation pump station, the communications path being at least partially a wireless communications path terminating at the control panel.
6 . The method of claim 4 , further comprising establishing a communications path with the user device prior to outputting the data message to the user device, the communications path being at least partially a wireless communications path terminating at the user device.
7 . The method of claim 4 , wherein the user device having the graphical user interface is a laptop computer, a tablet computer, or a smartphone.
8 . The method of claim 4 , wherein the graphical user interface comprises a touchscreen.
9 . The method of claim 4 , wherein the command to the control panel of the irrigation pump station is a command to schedule an irrigation event or a fertigation event.
10 . The method of claim 4 , wherein the command to the control panel is a command to perform fertigation based on a nitrogen level in the soil profile determined using the effective root zone for the crop.
11 . The method of claim 1 , wherein each of the plurality of incremental changes in soil moisture are relevant for root uptake if each change is a depletion in soil moisture occurring during daytime.
12 . The method of claim 1 , further comprising flagging each of the plurality of incremental changes in soil moisture that is determined to be relevant for root uptake.
13 . The method of claim 1 , further comprising determining, for each of the plurality of incremental changes in soil moisture determined to be relevant for root uptake, whether that change in soil moisture is due to drainage by comparing that change with an expected drainage rate.
14 . The method of claim 1 , further comprising determining, for each of the plurality of different depths, whether root uptake occurs by evaluating whether those incremental changes in soil moisture occurring that are not due to drainage at a particular depth represent accumulation during daytime and depletion during nighttime.
15 . The method of claim 1 , further comprising determining a root uptake value for each of the plurality of different depths where root uptake occurs by calculating a net daily change in soil moisture for each of the plurality of different depths where root uptake occurs.
16 . The method of claim 1 , wherein determining an effective root zone for the crop is performed by accumulating the determined root uptake values into a total daily root uptake and determining at which depth a predetermined fraction of the total daily root uptake occurs.
17 . The method of claim 16 , wherein the predetermined effective root zone criteria is approximately seventy percent of the total daily root uptake.
18 . The method of claim 1 , wherein the plurality of depths is four or five depths.
19 . The method of claim 1 , further comprising establishing a communications path with the monitoring device prior to receiving said data from the monitoring device, the communications path being at least partially a wireless communications path terminating at the monitoring device.
20 . The method of claim 1 , wherein the data management system hosted on the server comprises a database and an analytical processor.
21 - 62 . (canceled)