Author: Jennifer Mansfield

01 Jun 2019

“Just look at the bark!”

“Just look at the bark!”

One of my first jobs has been to identify trees on transects that have yet to be completed and confirm the trees on old transects. During this time I have also been teaching Megan and Jennifer some of the stand out features and my tricks to help me identify what tree is in front of us.  They grew weary of me always saying, “just look at the bark”.

When working in the Oak Hickory forest, I was blown away by the lack of honeysuckle. Unfortunately, the forest floor was still covered with dying lesser celandine, and the new carpet of Japanese stiltgrass was starting to grow. Both of these species are invasive in our area. As we identified our trees on the new transects, we found that majority of the trees are sugar maples. A few trees on the older transects were identified down to the correct genus, but we took it further and found the species as well.

We then started working in the Beech Maple forest, and again there was very little honeysuckle in this forest. As you looked around you could see the large beech trees scattered throughout the forest. Their trunks resemble large elephant legs due to their smooth grey appearance. We also found a very large sassafras tree near the edge of the forest by a trail used by team nature. The vast majority of the trees in Beech Maple were sugar maples just like the Oak Hickory forest. One can tell sugar maples from red maples based on the leaves. Sugar maple leaves are not serrated in the sinuses or on the lobes like red maple leaves. They also tend to have two lobes at the base of the leaf near the petiole that are larger and broader than a red maple leaf.

One trick I taught Megan and Jennifer was that if you fold over the top lobe of a sugar maple, it makes a square like a sugar cube. This is not possible with the red maple due to the serrations, or teeth, in the sinuses of the leaf. This forest could be potentially tapped for maple syrup production and education purposes in the future.

–Chad G.

Folding down the top lobe of a sugar maple leaf creates a "sugar cube".
The sugar maple leaf is on the left and the red maple leaf is on the right.
28 May 2019

What is Bulk Density?

What is Bulk Density?

Ask people what a plant needs to grow and you will probably get answers such as, “sun, water and soil”.  The soil provides important nutrients (and fungal associations) to the plant, but also needs to have right physical properties to allow a root to grow and penetrate. The physical growth of the root is quite dependent of the soil in which it is trying to grow.

One important measurement in determining the ability for a root to penetrate the soil is bulk density.  Bulk density is the weight of dry soil per volume (grams/cm3).  This value reflects soil texture and compaction.  In addition to affecting the ability of a root to grow, bulk density will affect infiltration, water capacity, porosity, nutrient availability and soil microorganism activity.

Bulk density can be measured by collecting a known volume of soil and then measuring the dry weight of the soil.  At Greenacres, we use one of two methods, depending on our location.  In the pastures, easily accessible by the soil probe, we can collect a sample in a plastic sleeve.  The tube is then cut into known lengths to determine volume and the soil sample dried.  In the woods, we collect the sample by hand by driving a cylinder (known volume) into the ground and collecting the sample.

Table 1 compares some bulk densities across Greenacres properties. In general, bulk densities below 1.6 grams/cm3 are good for root growth.  The soil in Lewis Township is more compact and has a higher bulk density compared to the pastures at Indian Hill.  The management of these soils contributed to this difference.

Table 1.  Bulk densities were measured across 3 Greenacres sites: Beech Maple Woods, Front Nippert Pasture and Lewis Township field.

Location Bulk Density (grams/cm3)
Beech Maple Woods (transect 1) (0-10 cm) 1.05
Front Nippert (pasture) (0-10 cm) 1.1
Lewis Township (historically soybean field) (0-10 cm) 1.61

 

–Jennifer

10 May 2019

“The Best Laid Plans…..”

“The Best Laid Plans…..”

We were so excited to begin our controlled experiment looking at the horses pastured with and without chickens.  The pasture was chosen, the chicks were reared and a smaller mobile coop was constructed.  We did not anticipate that the chickens would be reluctant to leave the coop and forage in the field.  We suspect the chickens may be too young to begin foraging and this has disrupted out experiment.  The equine department will continue to monitor ticks to collect data on numbers and will also collect data on the chicken behavior.  This information will be used to strengthen future experiments.

–Jennifer

01 May 2019

Where the Wildflowers are…

Where the Wildflowers are…

Being in the woods daily has given me a perspective on spring ephemerals that I have not experienced before.  In the past, I would generally hike in the woods around April and “see what was blooming”.  This year, I watched leaves emerge from the ground and in some cases knew exactly what flower was coming, but in other cases I had to wait several weeks for a flower in order to identify the species.   The mottled waterleaf leaves emerged early but I saw no blooms until May. In some cases, I was waiting for a bloom that did not arrive (wild leeks- thank you Team Nature for that tip).  Mayapple poked up its stems over the course of one weekend and I missed the bloodroot flowers completely.  But now I have a better sense of what wildflowers are on the property and where they are blooming.

–Jennifer

Yellow trout lily blooming amid the invasive lesser celandine.