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  4. »eUpdate 657 October 13th, 2017»Comparative Vegetation Condition Report: October 3, 2017 - October 9, 2017

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Department of Agronomy

Kansas State University

1712 Claflin Rd.

2004 Throckmorton PSC

Manhatan, KS 66506

785-532-6101

agronomy@ksu.edu

Extension Agronomy

Comparative Vegetation Condition Report: October 3, 2017 - October 9, 2017

The weekly Vegetation Condition Report maps below can be a valuable tool for making crop selection and marketing decisions.

The objective of these reports is to provide users with a means of assessing the relative condition of crops and grassland. The maps can be used to assess current plant growth rates, as well as comparisons to the previous year and relative to the 28-year average. The report is used by individual farmers and ranchers, the commodities market, and political leaders for assessing factors such as production potential and drought impact across their state.

The Vegetation Condition Report (VCR) maps were originally developed by Dr. Kevin Price, K-State professor emeritus of agronomy and geography, and his pioneering work in this area is gratefully acknowledged.

The maps have recently been revised, using newer technology and enhanced sources of data. Dr. Nan An, Imaging Scientist, collaborated with Dr. Antonio Ray Asebedo, assistant professor and lab director of the Precision Agriculture Lab in the Department of Agronomy at Kansas State University, on the new VCR development. Multiple improvements have been made, such as new image processing algorithms with new remotely sensed data from EROS Data Center.

These improvements increase sensitivity for capturing more variability in plant biomass and photosynthetic capacity. However, the same format as the previous versions of the VCR maps was retained, thus allowing the transition to be as seamless as possible for the end user. For this spring, it was decided not to incorporate the snow cover data, which had been used in past years. However, this feature will be added back at a later date. In addition, production of the Corn Belt maps has been stopped, as the continental U.S. maps will provide the same data for these areas. Dr. Asebedo and Dr. An will continue development and improvement of the VCRs and other advanced maps.

The maps in this issue of the newsletter show the current state of photosynthetic activity in Kansas, and the continental U.S., with comments from Mary Knapp, assistant state climatologist:

 

Figure 1. The Vegetation Condition Report for Kansas October 3 – October 9, 2017 from K-State’s Precision Agriculture Laboratory shows very little vegetative activity this week.  The greatest areas of photosynthetic activity are in eastern Kansas, with a small pocket along the Arkansas River near the Kearney/Finney county border.  Recent warm weather has increased crop maturity and reduced photosynthetic activity.

 

               

Figure 2. Compared to the previous year at this time for Kansas, the current Vegetation Condition Report for October 3 – October 9, 2017 from K-State’s Precision Agriculture Laboratory shows lower vegetative activity across the North Central Division into the southeast.  Much of that is due to increased cloud cover.  That cloud cover also resulted in the distinct splice line in eastern Kansas.  Western Kansas has some higher vegetative activity this year due to the more favorable moisture conditions for winter wheat emergence.
 

 

Figure 3. Compared to the 28-year average at this time for Kansas, this year’s Vegetation Condition Report for October 3 – October 9, 2017 from K-State’s Precision Agriculture Laboratory shows above-average activity is confined to the western third of the state, where favorable moisture has dominated.
 

Figure 4. The Vegetation Condition Report for the U.S for October 3 – October 9, 2017 from K-State’s Precision Agriculture Laboratory shows highest NDVI values centered along and east of the Appalachians, where rainfall has reduced drought stress.  High NDVI values are also visible in the Pacific Northwest. 
 

Figure 5. The U.S. comparison to last year at this time for October 3 – October 9, 2017 from K-State’s Precision Agriculture Laboratory again shows the impact that the split in moisture has caused this year.  Much higher NDVI values are visible across the northern states.  Last October, Montana and the Dakotas were moving into a dry pattern that became the start of the intense drought the dominated this year.  Recent rains have resulted in some recovery in that area.
 

Figure 6. The U.S. comparison to the 28-year average for the period of October 3 – October 9, 2017 from K-State’s Precision Agriculture Laboratory shows improvement in the drought conditions in the northern Plains. Below-average NDVI values in Idaho, western Montana, and parts of Wyoming are the result of recent snow in the region. In parts of Missouri, Ohio, and Illinois, below-average NDVI values reflect the combination of dry conditions and rapid maturity of crops. 

 

 

Mary Knapp, Weather Data Library
mknapp@ksu.edu

Ray Asebedo, Precision Agriculture
ara4747@ksu.edu

Nan An, Imaging Scientist
an_198317@hotmail.com