Soybean Producers Should be Patient yet Prudent about the Wet Weather

The weather-induced planting delays have many producers feeling pressured to plant soybeans. It seems like this is an important time to remember that 2016 was also a challenging planting season, yet we produced record soybean yields in the state. The table shows the 2016 soybean planting progress in Michigan.

 

 

 

If the soil surface is level and your planter, drill or air seeder is equipped to plant through the existing residue, consider planting without additional tillage. This practice has the additional benefits of eliminating the risk of tilling the soil when it is too wet and conserving soil moisture if dry conditions occur later this spring or summer.

 

If herbicide-resistant marestail has been a problem, the field should be tilled or sprayed with an effective burndown prior to planting. Also, remember that Liberty and the labeled dicamba herbicides (XtendiMax, FeXapan, and Engenia) are the only effective post-emergence herbicide options for multiple-resistant marestail. Liberty can be applied only to LibertyLink soybeans and the labeled dicamba products can only be applied to Roundup Ready 2 Xtend soybeans. Also, there are many guidelines and precautions for dicamba use in Roundup Ready 2 Xtend soybean producers must follow. These are listed on pages 101 to 103 in the 2019 Weed Control Guide for Field Crops.

 

 

Unless you have a planter that was originally built for higher speeds or have modified the planter for higher speeds by installing seed belt delivery equipment and hydraulic down pressure, significantly increasing your planting speed much above 5 to 5.5 miles per hour is not recommended in most situations.

 

 

Starter fertilizers (pop-up and 2-by-2) have a low probability of increasing soybean yields and profitability when soil test phosphorus (P) and potassium (K) levels are above the critical levels and maintenance rates of P and K have been or will be applied. In Michigan on-farm trials, pop-up fertilizer was profitable at two of eight locations and 2-by-2 starter fertilizer was profitable in five of 18 locations.

 

 

Understanding the planting capacity of your specific equipment can help you be more patient and be more efficient once the weather breaks and soils dry out.  Use the following formula to calculate soybean planting capacity:

 

[(speed in mph x planting width in feet) ÷ 8.25] x efficiency factor = acres planted per hour

 

For example, a single-fill, 40-foot air seeder operated at 5 mph and tended with bulk seed handling equipment can cover 19.4 acres per hour [(5 mph x 40 feet) ÷ 8.25] x .80 = 19.4 acres per hour. The efficiency factor drops to .65 when bagged seed is used or when filling individual row unit hoppers.

 

 

If you can’t increase your speed, you have two alternatives for increasing soybean planting capacity: operate existing equipment for longer hours, or lease a drill or air seeder and hire additional labor to operate and tend it. The first option will require planting in shifts and may not be feasible when planting into heavy residues, as the evening dews will make the stalks tough and harder to plant through.

 

 

Not all fields will be ready to plant at the same time. There are four factors that determine this: soil texture, soil structure, drainage (tile or surface) and amount of precipitation received. Most producers know which fields are likely to dry out first based on texture, structure and drainage. However, rain events are often localized and this should be considered also.

 

Waiting for good soil and weather conditions to occur and making plans for speeding up planting operations will benefit soybean producers this spring.