It seemed to take forever this spring, but hopefully all of your soybeans are planted – for the first and only time. Ohio’s biggest challenge is replanting; it is costly (new seed, cost of planting, lower yields due to delay in planting). The first step is assessing overall stand health – do you have enough plants to obtain the best yields? Based on a substantial amount of data, for soybeans planted in May, a harvest population of at least 100,000 plants/acre is generally adequate to maximize yield.
To estimate soybean yield, four yield components need to be considered: plants per acre, pods per plant, seeds per pod, and seeds per pound (seed size). A printable worksheet to estimate soybean yield can be found by clicking here.
You would probably have to be living under a rock to not at this time be aware of the issues with off target dicamba movement affecting soybeans and other plants in the states of Tennessee, Arkansas, and Missouri. The latter two states just banned any additional dicamba applications for the remainder of the growing season to avoid additional problems (subject to change probably), and some changes are coming in Tennessee also apparently. We have seen firstha
Several calls last week with pictures of injured and/or diseased soybean seedlings. For most of these situations we have the following scenario: PPO herbicides (flumioxazin, sulfentrazone, saflufenacil) included as a component of the preplant burn down, fields planted 7 days later with fungicide treated seed, followed by 1 to 2 weeks of suboptimum growing conditions (between 40 to 50oF) for 2 weeks, and greater than 2” rain. These conditions are very conducive to both Pythium damping-off and PPO injury.
Saturated soils after soybean planting can cause uneven emergence and stand reductions of varying extent depending on the stage of the soybean plant and other environmental factors including temperature and duration of saturated conditions. Additionally, increased disease incidence may further reduce plant stand.
Saturated Soil Prior to Germination: While soil moisture is necessary for germination, soybean seeds will not germinate when soils are saturated because oxygen is limiting.
You would probably have to be living under a rock to not at this time be aware of the issues with off target dicamba movement affecting soybeans and other plants in the states of Tennessee, Arkansas, and Missouri. The latter two states just banned any additional dicamba applications for the remainder of the growing season to avoid additional problems (subject to change probably), and some changes are coming in Tennessee also apparently. We have seen firstha
