Thursday, August 4, 2011
The drought continues
The situation in our native groves is very different. Large soil cracks have not developed. The roots of our native trees are so intertwined that each trees does not have an individual root zone and water is being extracted from the soil evenly across the grove.
The soil at the research station is an Osage silty clay. The shrink/swell capacity of this soil is extremely high. We see soil cracking almost every summer but 6 inch wide cracks represent the extreme end of the soil cracking phenomenon. It will take 10 to 15 inches of rain to close up these cracks before harvest.