Saturday, July 4, 2009

This shot shows a path of yellow soybeans directly in line where manure was applied this spring.
This photo serves to illustrate just how heavy the strawload
was in the manure that was applied. Stands were reduced
where manure was applied due to heavy slug, disease and insect
pressure.
This shot gives further illustration of how manure application this spring has caused beans to yellow.The manure in this case contained a high concentration of straw as shown in the middle photo above.Soil microbes have tied up most of the mineralized N in the soil as they work to break down the straw in the manure.Research has revealed that all soils seek to reach a Carbon:Nitrogen ratio of 10:1. This helps explain why crops will remain yellow for a period of time when high carbon loads are applied to a soil. This phenomena occurrred on many soils this spring when soybeans were No-tilled into heavy corn residues and soil temperatures remained cool and moist through
the early part of July.


No comments:

Post a Comment