Soybean Cultivation after Small Grain Harvesting (Repeat Cropping Method)

In the world of farming, double-cropping has emerged as a popular practice, particularly in regions like Ohio. A fact sheet titled "Double-Cropping Soybeans Following Wheat," authored by Dr. Jim Beuerlein of the Ohio State University Extension, provides valuable insights into this agricultural technique.

First published in 2001, the fact sheet offers guidance on planting and seeding rates for double-crop soybeans. For mid- to late-June plantings, the recommended harvest population falls between 130,000 to 150,000 plants per acre. Interestingly, the later in the growing season soybeans are planted, the greater the yield increase due to narrow rows.

The increased demand for double-cropping corn in Ohio in 2017 can be attributed to a combination of factors. Favorable weather conditions allowed for successful planting of both spring and second crops, and changes in farming practices emphasizing higher yields played a significant role as well.

The optimum seeding rate for double-crop soybeans in Clark County, Ohio, varied in 2016 and 2017. In 2016, the optimum seeding rate was 213,000 seeds per acre, resulting in a final stand of 204,000 plants per acre (82% of the seeding rate). However, heavy rainfall after planting in 2017 reduced the soybean plant population, resulting in a final stand of only 143,000 plants per acre (57% of the seeding rate).

Interestingly, for the same county in 2017, the optimum seeding rate was greater than 250,000 seeds per acre. This suggests that the ideal seeding rate may depend on various factors, including weather conditions and soil quality.

For early-July plantings, the harvest population for double-crop soybeans should be greater than 180,000 plants per acre. Soybeans should be planted in rows with 7.5- to 15-inch row spacing for optimal growth.

In conclusion, the practice of double-cropping soybeans, as outlined in the fact sheet, offers valuable insights into planting and seeding rates, and how these factors can impact yield. As farming practices continue to evolve, understanding these principles can help farmers make informed decisions to maximise their yields.