Irrigation FAQs
How much yield benefit do we get from irrigation in Mississippi?
Any yield response depends on the management and timeliness of the irrigation. The following table displays accepted yield data for the major irrigated crops in Mississippi.
Accepted Yield Responses By Crop
| Cotton | 180 pounds of lint |
| Corn | 50 to 180 (Average MS Yield is 90 bushels.) |
| Soybeans | 15 bushels. |
| Grain Sorghum | No good data. |
How much water does it take for different irrigation systems?
Furrow--A minimum of 10 GPM per acre.
Flood--(Rice), 15-20 GPM per acre.
Border--A minimum of 10 GPM per acre.
Center Pivots--A minumum of 4.5 GPM per acre to put out a gross of 1 inch in 4 days.
(Many producers are upsizing to put out an inch in 3 days or 6.25 GPM per acre).
Towable Privots and Traveling Guns--A minumum of 5 GPM per acre total to by irrigated.
Irrigation, Soil and Water Home
How many acres of Mississippi crops are irrigated?
(This will vary from year to year)
| Cotton | 300,000 acres |
| Soybeans | 350,000 acres |
| Corn | 200,000 acres |
| Rice | 250,000 acres |
| Other Crops | 100,000 acres |
When do you start to irrigate?
When you feel like an inch of rain would do some good and when soil moisture in the root profile reaches 50 percent depletion.
The critical stages for the different crops are:
| Cotton | Beginning bloom |
| Corn | Eight leaf stage and very critical at tassel and silk |
| Soybeans | Beginning bloom |
| Grain Sorghum | Boot stage |
Publications
News
If there’s one thing that’s important in gardening, it’s proper watering. Vegetable gardens need about 1 inch of water each week.
The Mississippi State University Extension Service is taking irrigation education a step further than before by offering Master Irrigator status to those who complete a course of training.
There is no cost to growers to participate in this training, which includes eight hours of online classes and 16 hours of in-person training. Drew Gholson, MSU Extension irrigation specialist and coordinator of the National Center for Alluvial Aquifer Research, said the goal is for participants to put into practice the skills acquired in the program.
Knowing when and how to irrigate are questions every grower with the ability to water their farmland on demand face each year.
Irrigation costs per acre are among the highest inputs growers face. In a state with the capacity both for extreme drought and high temperatures as well as prolonged rainy periods, the question of whether or not to irrigate is very important.
Success Stories
Brian Andrus irrigated exactly zero times on his Sunflower County farm in 2021. He didn’t even turn on his well.
Delta soybean producer irrigates his fields, increases yields
Most of the Delta is already irrigated, but not all farmers are taking advantage of the latest irrigation technologies. However, agents with the Mississippi State University Extension Service are increasing Delta producers’ knowledge— and application—of new, more efficient ways to water the rows.
Delta farmer Travis Satterfield reflects on 40+ years in the fields
The price of rice hasn’t increased much since Travis Satterfield of Benoit began growing it in 1974, but nearly everything else in the world of production agriculture has changed.
