The Drought Continues

September brought some relief from the all time record hundred plus degree days and we finally received some good rain - 6.15 inches. Every bit of which soaked into the ground. This was very good for the range grasses. It always amazes me how grasses can respond so quickly. All the pastures were brown and with no growth at all, yet in four days everything was green again. Wildflowers were blooming and grasses were shooting up and producing seed heads . . . . but this doesn’t end the drought. Remember that up until September we received only 11.24 inches for the year and during the hot summer months of May, June, July and August we only had 1.69 inches!

Since there was basically no runoff, our lakes, tanks and creeks are still, with a few exceptions dry. I hesitate to say the drought has a benefit, but it did give us the opportunity to remove silt from the lakes.

This tank was built in the late 1970’s. It has never been dry before and it was still boggy as the one loader got stuck in the mud. Photograph taken by J. David.

This pile of silt is 270 feet long, 50 feet wide and 6 foot high! Removal increased the tank capacity by 30 percent. After a prolonged drying out, we will spread it on the ranch. Photograph taken by J. David.

Madrone Lake, our most used recreation lake, on May 31, 2009. The creek that feeds it stopped flowing on July 28, 2008. Photograph taken by J. David.

Madrone Lake on October 8, 2009. The September rains soaked into the very dry earth. There has been no runoff to the lake nor spring activity to fill the lake. Photograph taken by J. David.

My observation of the effects of this drought on trees is that the most affected were Spanish Oaks. A Texas Forest Service representative estimated that we’ve lost 1,000! It surprised me that we lost at least five Bur Oaks. They have a tap root which goes deep into the ground. On the entire 5,500 acres I found only one Bur Oak. It’s probably 150 years old and in my 40 years here, it has never produced an acorn. We have planted all the other Bur Oaks on the ranch. Those five that died from the drought were seven to ten years old. Lacey Oak, some call it Blue Oak, and Live Oak have survived without loss. There has been some loss of Native Pecan, Walnut, BigTooth Maple, and Bald Cypress. It’s important to withhold judgement on this until next spring as some of these may come back to life.

This nice Spanish Oak shut down in late August. Aesthetically, it is a real loss as it was positioned along the road for all to see. Notice on the right a dead Bald Cypress. Photograph taken by J. David.

These are just two of many Bald Cypress we’ve introduced. Naturally there weren’t any on the ranch. I knew it was a risk to plant them at higher elevations, but since the creek had begun to run it was a good gamble. These are 40 foot tall and I don’t expect them to spring back to life as they got severely stressed in 2008 as well as in 2009. Photograph taken by J. David.

We call this the Catfish Tank. It has never gone completely dry. It has one spring and a 500 acre watershed to feed it. Photograph taken by J. David.

Obviously this tank has been dry long enough for cracks to develop and grass to grow. Photograph taken by J. David.

Because of the recent rains, one may want to declare this current drought over. This is not true. Conservation practices one may have developed due to the drought should become part of one’s life. Water is the single most important issue facing all of us.

Going to Seed: Acorns

Reproduction is important in plants just as it is in animals. In both, when the mature generation is aging, a new generation needs to be growing up to take its place. In many plants, such as wildflowers, trees and shrubs, seeds are produced from fertilized flowers, and they carry the spark of life that will become the new generation, and they are often packaged with the food that will give them a good start.

The seeds of oaks trees are acorns. The acorn is defined in the book, "Plant Identification Terminology" by James G. Harris and Melinda Woolf Harris as," The hard, dry, indehiscent (which means that they do not open at maturity along definite lines) fruit of oaks, with a single large seed and a cup-like base".

According to an excellent book about the use of plants by animals of the U.S., "American Wildlife and Plants, A Guide to Wildlife Food Habits" by Alexander C. Martin, H. S. Zim and A. L. Nelson, "Oak trees are of major importance to both man and wildlife, and acorns are at a position at, or very near the top of the wildlife food list. Acorns provide a good and abundantly available staple - the staff of life for many wildlife species. The acorns of the white oak species are more palatable to wildlife just as they were preferred by the Indians and early settlers." The red oaks are much higher in tannins which makes their acorns bitter.

I don't know where this illustration of different seeds types "Common Types of Fruits and Seeds" came from, but we have used it for years with students and at workshops. The acorn is in the upper left-hand corner. (If you know the origin of this illustration , please let me know so I can give the author and/or artist credit.)

Bur Oak has very large acorns (Quercus macrocarpa) ["macro" = large "carpo" = Greek for fruit] and the Bur Oak tree's acorns are the largest we have at the ranch. This one is over an inch wide and if you count the cup which is deep and fringed with course hairs in the measure it is almost 2 inches wide . The leaves of the Bur Oak can be up to a foot long. The leaves in this picture were 6 to 9 inches long.

The Bur Oak acorns on the left are huge compared to the much smaller Spanish Oak (Quercus buckleyi) acorns on the right (note the quarter in the middle of the large acorns for size comparison). The white oak family to which the Bur oak belongs are sweet. Red oak acorns are high in tannins which give them a bitter taste. Native Americans made flour and tasty dishes with white oak acorns. Animals love them too.

Bur Oak Acorns are very popular with animals. These acorns have been partially eaten, probably by squirrels. J David planted Bur acorns in pots by the Greenhouse, and covered them so no acorn loving critters couldn't reach them. He underestimated the cunning of squirrels, and was dismayed when he returned to find that eight of the containers showed evidence of tampering. Two of them still had an acorn and in the others the acorns were missing.

These beautiful dark brown acorns are on a Plateau Live Oak tree (Quercus fusiformis) and are up to an inch long. The large number of Plateau Live Oak trees in this area mean that their acorns are important food for turkeys, deer, jays, titmice and woodpeckers. It is also the host plant for the caterpillars of skippers, hairstreak and admiral butterflies.

Live Oaks can get to be very large. This one, along Miller Creek has a sign that says "Largest Oak Known in Blanco County". I have no idea whether it is a Plateau Live Oak which is the common oak here at the ranch, or if it is the Coastal Live Oak (Quercus virigiana). It is huge and I think very, very old.

These acorns were on the ground under a large Lacey Oak (Quercuw laceyi) tree. We have a grove of these beautiful oaks along Miller Creek. I didn't find any of the smaller trees with acorns on them, so I was unable to get a photograph of acorns in their cups on a tree.

The old Lacey Oak trees in the grove are beautiful, with light gray bark, and graceful arching branches.

The leaves of the Lacey Oak have a thin coat of a waxy substance on their surface that reduces water loss during dry spells, and also gives the tree a bluish tint which has earned this oak the common name "Blue Oak".

There are many animals that love acorns and some actually hide them away for later in the year when food is less plentiful. Squirrels and other small mammals bury them, and then forget where they put them. Thus they plant a new crop of oaks, and some of the new plants will replace the old ones that are dying. The young sprouts are also food for other animals.

I found out from Scott Grote, who manages the deer and hunts, that the acorn crop this year is large enough that the White-tail deer aren't as interested in our corn feeders as they are in years when the acorn crop is smaller.

There are many cycles in nature, warm and cold, wet and dry. It would seem that a dry year like this past 12 months would produce a small crop of acorns. However when you consider that we had an unusually wet spring in 2007, the extra water probably gave the oaks the health they needed to make it through a dry year. When looking at the health of trees you look at what has happened in the last 2 or 3 years, not just the recent seasons.

Enjoy the fall. Leaves are changing color. Lots of plants produce their fruit in the fall. The air is often cool. It is one of my favorite times of the year.

Of course, I would love to see some rain!