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Soil Moisture 6/7/18

drought monitor 6-7-18

Nebraska drought monitor map released 6/7/18.  18.1% of State is abnormally dry (yellow) with 5.4% of the State as moderate drought (tan).

Byron 6-7-18

Corn is at V7 in this field.  The third foot sensor started reading strangely-very wet.  The third foot profile is dry but sensor not showing it-thus the total soil moisture is not reflected as dry in this graph as it truly is.  This location received 1.33 last week.

Lawrence 6-7-18 corn

I had re-installed the 2 foot sensor in this field and it is showing how dry the second foot has quickly become.  The same is seen across the road in the soybean stubble.  0.88″ was received at this location in the past week.  Soybeans in this field were at V1 on 6/7/18.  This farm family mentioned that first alfalfa cutting was 1/2 of normal this year.

Lawrence 6-7-18 Soy

Corn in this field was at V5 on 6/7/18.  The soil profile in the top foot is drier compared to in the corn stubble across the road-which has been typical all year.  Total soil moisture depletion in this field right now is around 50% for top three feet.

Superior 6-7-18

This location was blessed with some rain!  1.35″ was received 6/2/18 and another 0.50″ the morning of 6/7/18.  The top two feet truly are muddy in this field when probing the soil but moisture runs out about 2.5 feet down into the profile.  Corn was at V5 at this location on 6/7/18.

Soil Moisture 5-17-18

Hoping these graphs change for us after this past weekend’s rain events!  These readings were taken as of 5/17/18.

Byron 5-17-18

As of 5/17/18, total soil moisture depletion in this field stayed fairly steady.  The top two feet are nearing field capacity.

Superior 5-17-18

At the Superior location as of 5/17/18, total soil moisture depletion remained around 40%.  The first foot is nearing field capacity with the second foot nearing 35% depletion.

At the Lawrence location I’m just sharing last week’s graphs from 5/10/18.  Soybean was planted into the corn stubble on 5/11/18 and the sensors were removed and re-installed with the readings needing time to adjust.  The farmer said it was so dry he had to use a drill to re-install the moisture sensors.  I have no idea what happened in the soybean stubble field but the readings this past week were crazy so decided to share new graphs on the Lawrence location next week.

Lawrence 5-10-18 CornLawrence 5-10-18 Soy

Soil Moisture 5-10-18

The area of ‘abnormally dry’ or ‘moderate drought’ was reduced by 5% in Nebraska as of 5/8/18 compared to the previous week.

Bladen 5-10-18

This site has continually missed the rain.  The first foot can be observed as slowly drying out as  well this week with total soil moisture (1-4′) remaining above 50% depletion.  This site was removed due to corn being planted in this field.  

Byron 5-10-18

Last week’s rains did help the first and second feet remain below field capacity.  However, the third foot did not remain wet after the rainfall event and can be seen climbing in depletion in the graph this week.  I did probe this site this week and there appears to be good moisture now just past 2 feet, but it gets dryer after that.

Lawrence 5-10-18 Corn

This site continues to remain steady with total soil moisture depletion around 35%. 

Lawrence 5-10-18 Soy

The first foot sensor has leveled off after being reprimed on 4/26.  Total soil moisture depletion (1-3′) remains around 45%. 

Superior 5-10-18

Last week’s rains helped with the first foot and somewhat with the second foot at this site.  Total soil moisture depletion is around 40%.

Soil Moisture 5-3-18

Today was interesting driving my route through the southern tier of counties I serve.  Wearing overboots and walking instead of driving to the sensors was welcome at Byron and Superior where heavier rain events occurred this week.  However, Lawrence and Bladen had largely missed the rains.  The Clay Center location received 1″ the past two days, but other areas of Clay County received very little.  The farmers who have allowed me to monitor pre-plant soil moisture thus far were interested in watching this throughout the growing season.  Thus, sensors will remain in most of these fields.  Where fields have been planted thus far (other than Clay Center), planters have planted around the sensors and seeds have been hand-planted between sensors.

Drought Monitor 5-1-18

The Nebraska Drought Monitor Map updated 5/1/18 (before the rain events the past few days) showed expanded areas of ‘abnormally dry’ (yellow) and ‘moderate drought’ (tan).  Stars show the locations of soil moisture monitoring equipment.

Bladen 5-3-18

This location essentially missed the rains this week with the top foot remaining around field capacity and 2-4′ near 40% depletion or above.  Wheat near this location had jointed but was shorter than at Lawrence and Superior.

Byron 5-3-18

This location has been interesting to monitor.  Last week I mentioned that moisture received wouldn’t be enough to maintain the second foot near field capacity after 4/26 (which is true from the climb observed in the second foot).  This location received 1.5″ the past two days. With the top foot at field capacity, it makes sense that today it is showing near saturation with the second foot dropping below field capacity as well.  I should have probed the soil to see if moisture truly reached the third foot or not.  The chart shows the third foot also filling below field capacity.  We will know more from next week’s graphs.  Being a no-till field, the rain soaked in well even though it appeared to come hard from the way the road had washed in spots and was super soft.

Lawrence 5-3-18 Corn

This location received some misting as I was collecting this data, but the sun soon came out and steam began rising from this field and the soybean field across the road (next graph).  Essentially 0.05″ of rain was received at this location and the graph remained unchanged this week for the most part other than increasing soil temperature.

Lawrence 5-3-18 Soy

At this soybean location, something had caused for a disconnection in the 1st foot sensor last week, so I reprimed the sensor on 4/26.  I didn’t take out the first 48 hours in this graph (which we say is normal time to acclimate to the soil).  The first foot is currently showing over 15% depletion this week with total soil moisture depletion near 50%.  

Superior 5-3-18

This location received 1.25″ of rainfall the past few days which helped the second foot recharge to near field capacity and the total soil moisture (1-4′) be near 35% depletion.  Wheat near this location had jointed and elongated a great deal compared to last week.

Beginning Soil Moisture 4-26-18

Some rains helped with the top foot profile at some of these locations last week. One thing to keep in mind when viewing these graphs is we don’t always know what’s going on below the soil surface. One farmer had a good point regarding my “blips in the graphs” in my last blog post. I mentioned they could be due to a soil crack along the PVC pipe-which we do see occur and can be true. However, he also had a good point that it could be a worm hole, root channel, etc. that water may have followed for a brief time period, which could also be true, especially in these long-term no-till fields. As you look at the charts this week, it’s important to keep in mind that soil water also moves via gravity (termed ‘gravitational water’). Thus, sometimes why we can see changes in soil moisture in the successive drier layer with small amounts of precipitation.

Drought Monitor 4-26-18

Nebraska Drought Monitor as of 4/26/18 showing increasing ‘abnormally dry’ areas of the State.  The ‘moderate drought’ area has expanded further into Webster and Thayer counties.  Stars show locations where I’m taking pre-plant soil moisture status.

Bladen 4-26-18W

Beginning soil moisture at Bladen remained relatively unchanged last week.  The top foot went back to around field capacity with some rain events.  Total soil moisture depletion is above 50% at this site as are all soil layers from 2′-4′).

Byron 4-26-18

Moisture last week did appear to re-wet the top 2 feet.  I even probed the soil in the same area to ensure there was truly moisture in the second foot, which there was.  Yet as you can see from the graph, the second foot was starting to climb when I took these readings. My guess is without additional precip, the second foot will be above field capacity again next week.

Clay Center 4-26-18

Because the top two feet were already around field capacity, gravitational water along with moisture received last week may have created the dip in the third foot readings seen over a few days.  It was rising back up to above 50% completion on 4/26.  The sensors were removed on 4/26 as the field was planted to soybean that day.

Lawrence 4-26-18 Corn

This location received 0.20″ of rain last week with essentially no change in soil moisture status from the previous week.  Total soil moisture (1-4′) is steady around 35% depletion.

Lawrence 4-26-18 Soy

This location also received around 0.20″ of rain last week.  Something happened to create a short in the top foot sensor, thus, the lack of data for 1′ and total (1-3′) after 4/22.  It was fixed on 4/26.

Superior 4-26-18

This location received around 0.60″ of rain last week.  The top foot remained steady and there was a gradual decrease followed by increase in soil moisture in the second foot.  This would make sense from the combination of gravitational water and the precipitation moving through the first foot into the second, but the moisture wasn’t enough to maintain the second foot at a wetter moisture level.

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