NJ2018-2 Lyndsey
For this final project, I investigated how to organized the various processes and steps of Nongsa jikseol. This was challenging because the steps of one plant variety are dependent on the steps of other varieties, some varieties share some of the same processes but not others, some steps are conditional on certain events such as a particular date on the calendar or the growth of a plant to a certain height, etc.
I was unable to add all the data for all of the crop varieties, but I have selected a few of the more tricky and complex cases to demonstrate how these can best be organized.
Below, I have included my suggested ontology (for just the elements relating to step order and timing - not tools, ways-of-doing the steps, rationales for the steps, or cautions). Then I will explain the ontology and the reasons why I chose to structure it the ways I did.
Ontology
Classes
| Type | Class | Description |
|---|---|---|
| Step | Soil Preparation | Field selection, plowing, tilling, etc. |
| Step | Soil Fertilization | Fertilization of soil |
| Step | Seed Preparation | Preparing the seeds for planting, such as rinsing them in water, covering them with fertilizer, etc. |
| Step | Sowing | Putting the seeds into the soil and manipulating the soil so that the seeds can be covered, etc. |
| Step | Weeding | Removing weeds from the soil by means of hand, hoe, ox, etc. |
| Step | Harvesting | Cutting or picking the ripe crops |
| Time | Static Time | Timings based on the sun and moon (i.e. calendar time) |
| Time | Dependent Time | Timings based on the things which have flexible or unpredictable lengths or occurrences, such as "when the plant grows three inches" or "when the snow melts" |
| Condition | Condition | Conditions under a step is or is not performed that are not related to time |
| Cultivation | Crop Variety | A crop variety |
| Cultivation | Cultivation Method | Sometimes the same crop has an alternative method (such as relay cropping), which can be denoted with this crop method class |
| Cultivation | Crop Field | The kind of field the crop is being planted in, i.e. what was formerly planted in the field, or dry/wet field (not field condition (barren, fertile, etc.)!) |
Relations
| Relation | Domain | Range | Description |
|---|---|---|---|
| then | step | step | Simple ordering of steps |
| doAfterThreeDays | step | step | Still a simple order but with a specific amount of time in between |
| doImmediately | step | step | Still a simple order but with a specific amount of time in between |
| doAtNight | step | step | Still a simple order but with a specific amount of time in between |
| doConcurrently | step | step, condition | When two processes happen at the same time, or when the step happens throughout the period of a particular condition |
| doWhen | step | time | Do the step when the time event occurs |
| doBefore | step | time | Do the step before the time event occurs |
| doAfter | step | time | Do the step after the time event occurs |
| idealTime | step | time | When there are multiple possible timings, this timing is best |
| okayTime | step | time | When there are multiple possible timings, this timing is acceptable |
| worstTime | step | time | When there are multiple possible timings, this timingis worst |
| doIf | step, crop | condition | Only do the step in this case |
| doNotDoIf | step, crop | condition | Do not do the step in this case |
| hasStep | crop method | step | Way to group the steps for a particular variety's normal method or special method |
| hasVariety | crop method | crop variety | Way to group the steps for a particular variety's normal method or special method |
| hasField | crop method | crop field | Way to group the steps for a particular variety's normal method or special method |
Explanation
There are largely four sets of relation types:
- Relations between steps and steps (order)
- Relations between steps and the cultivation method of which they are a part
- Relations between the cultivation method and the crop varieties and field types for which they apply
- Relations between steps and timings
- Relations between steps and conditions for when to do/not do the steps
Excluded from this list are tools, cautions, rationales, and ways-of-doing.
Through drawing the graphs, I realized that often times, one variety will have multiple cultivation methods which often shared certain steps. Therefore, I realized I could not group all the steps by just the crop variety, or there would be no way to know which order of steps applies to which cultivation method. Therefore, I decided to connect each step to a cultivation method, and then connect this cultivation method to a variety(ies) and field type (as in relay cropping in the root-fields of other crops). This is shown as an example in NJ2018-2_L_barleywheat4.lst.
For example, you can seen in the barley/wheat examples (NJ2018-2_L_barleywheat1.lst, NJ2018-2_L_barleywheat2.lst) that the first parts of the cultivation methods are different, but they share the parts of weeding and harvesting. Therefore, this reduces the number of nodes while still being able to query a particular cultivation method's entire process in order.
However, you must be careful to not have two cultivation methods share the same node if the timing or condition is different. For example, both methods involve sowing by "scattering seeds" but if one is done "in the 5th month", and the other "is done after burning the foliage of plants into ashes," these steps should be distinguished as separate nodes. Otherwise, we cannot know which condition or timing applies to which cultivation method.
There was also the issue of relay cropping, in which the harvesting process of one crop is part of the soil fertilization step of another crop. In this case, it was realized that for relay crops there would be two "harvesting" steps - one the harvesting of the previous crop, and the other the harvesting of the current crop. The two different harvest steps would each have unique IDs, but how would the computer know which harvest is of crop? The computer only knows the harvest step is a part of two methods? I wondered whether the individual steps also needed variety labels - but that just makes the overall structure more confusing. I realized that which crop was being harvested in a step could be deciphered indirectly by the direction of the "then" arrows. If a harvesting step comes after a weeding step of a cultivation method, we know what is being harvested is the crop of that cultivation method. Conversely, if the harvesting comes before soil prep or sowing steps of a method, we can know it is the harvest of the crop in the other cultivation method the step is related to.
Regarding what to do about things like "wait three days" to do the next step, since the order of the steps is still just "A then B" I kept this as a relation rather than making it another node. If the timing is related not to a step, but to a solar/lunar time or a time that is uncontrollable to the farmer, then this was added as a node.
Also, through creating the sample graphs, I realized that the relation "or" as in, "For this step, do A or do B," should not be used. The reason is as follows. For example, in the case of barley/wheat, it says "plow in the 5th or 6th months." We may think to make make two relations, "plow--doWhen--5th month" and "plow--doWhen--6th month," and then put an "or" relations between the months, like "5th month---or---6th month." However, we do this, then for all other crops that use the 5th or 6th month, there will be an "or" relation in between the months. For example, if crop B says "plow in the 5th month" and "sow in the 6th month", but this "or" relation is between them, it could look like "plow or sow," which is not the intended meaning. Therefore, regarding time there are two options. One, create two steps, such as "plow and plow" and give each a different time, and then link them both to the previous and following steps, creating a kind of diamond shape. This can be seen in the case of NJ2018-2_L_barleywheat1.lst, where there are three different possible sowing times with different conditions. Or, in the specific case of "plow in the 5th or 6th month," this can be changed to "--doAfter--4th month" and "--doBefore--7th month" to denote the entire time span of the 5th and 6th months (which is what I did in the example above).
Future Work
- After all the data for each crop method is added, it would have to be consolidated to cut out the redundant steps (but make sure to keep the steps distinct if there are different conditions/timings for a similar step)
Example Graphs
- NJ2018-2_L_hemp1.lst - simple process
- NJ2018-2_L_sesame1.lst - show multiple methods for same crop variety
- NJ2018-2_L_beans1.lst - early sowing and late sowing varieties together (showing sharing of steps by different carieties)
- NJ2018-2_L_beans2.lst - one bean variety only
- NJ2018-2_L_beans3.lst - relay cropping
- NJ2018-2_L_barleywheat1.lst
