Brenna Colglazier
I was standing out in the middle of a cornfield, miles away from any help I could normally rely on back at farm. There wasn’t a single person in sight besides my sister, Hanna, who was presently having a mental breakdown over the numerous spiders that had seemingly appeared overnight, making their homes in the corn. I was alone, and it was my sole responsibly to brave the spiders and finish our task: collect some corn leaves. Hearing the title “corn tissue sampler” may make someone think of scientists working in a lab, analyzing plant tissue and DNA. In reality, it’s simply walking out into a field and gathering corn leaves. This may make you wonder: why is there a job for that? Let me clarify that this job may seem simple, but it takes a lot more bravery, endurance, and determination that one might expect. A tissue sampler must fill a variety of different roles to successfully complete their job on any given day.
The first role a tissue sampler takes on is the navigator. Early into this job, my boss, Mr. Hughes, had an idea to use Google Maps to precisely track the locations of the sample sites, so we wouldn’t get lost. This sounded easy until our phones started giving us directions to locations miles away from the intended sites. Since phone tracking was off the table, Hanna and I were given a map. This was no ordinary map. It was a color-coded map, comprised solely of uniform green, yellow, orange, blue, and brown squares intended to represent all the fields/sections in the area. To say the least, for two high school girls with a terrible sense of direction, this map was confusing. Looking back, I am proud to say that we only arrived at the wrong field once or twice during that summer.
As the designated navigator, it was my job to direct Hanna, the driver, to six different irrigated corn fields we had to obtain samples from. There was one time we were speeding to a field when I squinted and thought I noticed our turn ahead, which was hidden by the nine-foot corn. The John Deere Gator we were zooming around in had no windshield or exterior cover. This made it considerably difficult to hear each other over the engine revving and the wind whipping around our ears. Barely realizing the turn was now a mere 30 feet away from us, I decided to yell, “Hanna, turn right! Now!” She heard me yell to turn, except, she misinterpreted the directions and took a hard left instead. The Gator swerved into the grass-covered road ditch as she slammed her foot on the brakes. The whole right side of the vehicle was thrust into the air momentarily and slammed back to the ground. After a minute or so had passed since nearly flipping the Gator, we drove back out of the ditch and turned around to head into the field. Since then, the speedometer on the Gator has never registered over 35 miles per hour while either of us were driving.
The next role a tissue sampler will find themselves in is the explorer. Once Hanna and I would arrive at a field, we needed to locate the eight-foot red flags that marked the sampling sites. Generally, these flags were at least 40 rows away from each other, so we would have to split up. Early in the season, as you might assume, finding these flags to collect the samples was easy. A normal field stop during this time might take us eight minutes max. Flash forward to late in the growing season, and these previously quick stops were taking us over half an hour for each field. Why did this change so drastically? Recall that important things such as our missed turn tend to get hidden by the tall corn. These flags were only eight feet tall, so the corn covered them by a foot. On top of this, these flags were placed deep within the field. Finding one of them was like trying to spot Waldo, if Waldo was a minuscule ladybug perched on a blade of grass in a random part of your lawn.
Thankfully, since we had been collecting samples for around six weeks before the corn became difficult to see over, we were able to accurately guess what part of the field the flags were stationed at. There was a time when Hanna and I had completed sampling all our assigned fields, expect for one. We split up to find the last two flags and both made our way into the corn. While walking between the rows, I was certain I would find the flag if I kept moving straight, but I was also preoccupied trying to ignore all the bugs buzzing around me as I pushed my way through the thick leaves. It felt like 100°F between the humid corn rows, so many times, I would find myself getting dizzy from the heat. Nevertheless, I kept slowly fumbling my way through the corn.
Five minutes later, I abruptly stopped. My face was centimeters away from a quarter-sized, green corn spider. Naturally, I screamed at the top of my lungs, promptly launched myself backwards like a cat who saw a cucumber, and cursed at the spider. Since I wasn’t about to keep walking anywhere near that spider, I switched over a few rows to my right. Once I had walked what I considered to be far enough from that spider (at least 20 feet), I switched back to the original row I walk walking in, so I wouldn’t miss my flag. At least, I thought I had switched back. I ended up walking right past the flag, so I had to meander back out of the field to try again. It took me three more tries and over an hour before I finally found that flag.
Another role a tissue sampler must be ready to take on is the delivery person. Not only did we have to collect all 12 samples, but we also had to drive them back to the farm to package them in time to be shipped by 1:30 p.m. This was a hard deadline that we couldn’t be late to, or the samples couldn’t be shipped to the lab in time for them to be tested within the week.
There were a few times we were minutes from missing the deadline. One of the times, I couldn’t find the last flag because the field was being watered by a pivot. I had to walk out into the field, while being sprayed with ice-cold water. Soaked from head to toe, I climbed up onto the moving pivot to get a better view. I was able to spot the flag 20 feet away and climb down to get the last sample. Another time, we were starting our rounds, but the field we chose was already soaked with water. Despite this, Hanna still decided to drive into the field, where we promptly got stuck in the mud. She had to back up the Gator out of the field over the course of 20 minutes. Once we were safely out, we still had to put on our irrigation boots to go get the samples, and trudging through mud that suctions onto your shoes certainly wasn’t a fast process.
The final role a tissue sampler gets to play is the scientist. All the samples that get collected over the course of two months provide information to the farmer that helps with decisions in fertilizer application. Tests done in a lab using the samples can indicate the nutrient content within the corn plant. Maybe those tests indicate a certain field is low in magnesium. A farmer can then apply a fertilizer with extra magnesium to that field. The entire goal of tissue sampling is to make sure a plant is sufficient in the essential nutrients it needs to thrive and produce a bountiful crop at harvest. Many times, Mr. Hughes would receive the results of the lab tests and let us look at the data. He would point out what nutrients the crops were low in, and in the next few weeks, we would watch the nutrient content data climb back up to being sufficient.
Looking back on this job, I see that being a tissue sampler wasn’t just collecting leaves from corn plants. It was an adventure, where I learned to rationally deal with the many problems thrown my way. I faced faulty directions, bad driving choices, getting lost, working under a time limit, and worst of all, spiders. However, I chose to think this job truly helped me get over my fear of spiders.


