US researchers found that soybeans associated with naturally occurring rhizobia had lower aphid densities than either the artificially fertilized plants or the plants inoculated with commercial rhizobia. They also found the same level of nitrogen in both soybean plants inoculated with natural rhizobia and those inoculated with commercial varieties. The researchers do not yet know what the natural nitrogen-fixing bacteria do to repel aphids.

To have proper nodulation you need oxygen in your soil and sulfur.

SuperCal SO4 should be in every soybean blend. SuperCal SO4 provides sulfur in the plant available sulfate form. SuperCal SO4 helps naturally aerate soils too! Without air and sulfur rhizobia cannot do their job and provide the soybeans with adequate nutrition.

Yield Starts Here is a blog for farmers, focusing on increasing yield and profitability by focusing on the soil. It is managed by Craig Dick, a Blogronomist and Sales and Marketing Manager at Calcium Products. Find other articles by Craig and guest writers at http://blog.calciumproducts.com/ .