In the late 1950’s, my grandfather bought a quarter section of farmland just southwest of Stockham, Nebraska. At the time, all but about 26 acres of that 160 acre land parcel was in row crops. The unfarmed areas (the steepest slopes and wettest draws) were a combination of native prairie and other “waste” ground. From what I understand, Grandpa’s intent was to buy the land and put much of the cropland back to native grass pasture, keeping only the flattest areas and most productive soils to farm. Regardless of whether or not that was his initial intent, he did indeed do that restoration project in 1962 – using the Soil Conservation Service’s Great Plains Program to provide cost-share for the seeding and construction of a livestock dam. Approximately 87 acres of cropland was planted with a mixture of native grasses, including primarily big bluestem, indiangrass, switchgrass, little bluestem, side oats grama, and western wheatgrass – with a little blue grama thrown in too. (We still have the receipts from the seed company.)
Starting in 1964, Grandpa started grazing the new pasture – including the unfarmed portions – and it’s been grazed annually ever since. The pasture grazing was designed to be both profitable and sustainable, and as far as I can tell it has been. There is no evidence of chronic overgrazing, and a number of “grazing sensitive” plant species are still abundant, especially in the old remnant areas. My grandpa died in 1990, and Grandma died earlier this year. After Grandma’s death, most of the other family farm land was sold, but after some long discussions, we kept the ¼ section in the family. My wife and I now own a 2/3 interest and my aunt and uncle own the other 1/3. Although I was helping Grandma manage the pasture for more than a decade before her death, actually owning the land makes me see the pasture in a much different way. Before we shelled out our hard-earned money to buy it, the pasture was an interesting place to go cut cedar trees and walk around, and I tried to help Grandma set up the grazing leases to ensure that the land stayed in good condition while bringing in a reasonable income. Now, as an owner, that lease income means a whole lot more, as does the current and future condition of the grassland. Decisions about how to balance stocking rate and income with plant community impacts are a little more real!
I bring all this up as background discussion for the real subject of this post. Though I’m sure it wasn’t Grandpa’s intent when he seeded the site back to grassland in 1962, he actually did some pretty great prairie conservation work. He took a series of very small isolated remnant prairie islands and filled the space between them with grassland habitat. It’s hard to know how many plant and insect species populations have larger and more viable populations now because of his work. Certainly the site has improved habitat conditions for the grasshopper sparrows, western meadowlarks, and other grassland birds that are nesting there.
While any grassland is better than no grassland, the re-seeded areas of the prairie are still distinct in appearance and composition from the unplowed areas. Many of the prairie remnants contain fairly abundant populations of conservative forb species, including leadplant, stiff sunflower, prairie violet, prairie clovers, and many others. A few of those species have moved into the re-seeded areas, but mostly at low abundances. The re-seeded areas are dominated by grasses, but also have an abundance of many common forb species such as goldenrods, white sage, ironweed, hoary vervain, yellow prairie coneflower, dotted gayfeather, yarrow, and others – along with strong populations of sweet clover.
I only recently found some hand-drawn maps showing the exact locations of the unplowed areas, and was able to cross-check those with old aerial photos from before and after the 1962 seeding. Now that I know those locations more exactly, I’ll be able to start making even better comparisons between the remnant and re-seeded areas. I started that process this last weekend, taking an inventory of plant species in the re-seeded areas (I found 65 species). I’m sure I’ll add to that list over time, but that’s not too bad, considering only 6-7 grasses were planted there initially. I don’t know yet how many plant species are in the remnant portions – I’m still working on that.
In some ways, it’s amazing to see the diversity of plants in those previously farmed areas. If I took a botanist to the site without divulging its history, I’m pretty they’d have no idea it had once been farmed. At the same time, while there is good plant diversity at the site, it’s interesting to see how few conservative plant species have made their way into the previously farmed areas. I’ve seen a few individuals of leadplant, a few patches of purple and white prairie clover, some areas of purple coneflower, and a few stiff sunflower colonies. Prairie violets have begun creeping from the remnants into the re-seeded areas too – but in 50 years, they’ve only made it about 20 or 30 yards.
All of this points out the importance of protecting and managing remnant prairies to avoid losing those conservative plant species. Once they’re gone, it’s not realistic to expect them to just come waltzing back in from nearby sites. During the last 10 years or so, I’ve been overseeding portions of the re-seeded prairie with locally harvested seed. As is typical, the results of that have been fairly muted, but I’m hoping my work gets those plants to establish a little faster than they otherwise would have…
Of course, if Grandpa’s restoration project was being done today, and the main goal was really to ecologically reconnect those small prairie islands, the cropland around the prairie remnants would be seeded with a high-diversity mixture of prairie plant species. That would help ensure that the seeded area facilitated a number of ecological needs, including the availability of host plants for a variety of insects and genetic flow between plant species. In 1962, no one in Nebraska was even thinking about anything like that, and Grandpa’s goal was (I think) simply to take a piece of land that was being overused and make it into productive agricultural land. I’m pretty sure he’d never heard of a grasshopper sparrow. Regardless of his initial goal, there is now a 108 acre prairie in southern Hamilton County, Nebraska – and that’s a rare and valuable commodity. The nearest prairie to ours is at least several miles away, across many acres of cropland.
I don’t know exactly know how to measure the ecological value of our prairie, but I’m sure proud to own it.