Stress on corn at pollination
Daily wilting is taking a toll, primarily by diminishing the energy (sugar) that keeps leaf tissues healthy and repairs damage, but also by causing damage itself. The loss of water vapor through the stomata normally cools the leaf. Leaf temperatures rise above air temperature when the leaves are not getting enough water to keep stomata open. Moreover, sunlight energy that cannot be used in photosynthesis when stomata are closed can damage chlorophyll and the photosynthetic apparatus, leading eventually to loss of leaf color.
Many producers are trying to guess how much corn yield potential has already been lost. In the majority of fields -- those that are pollinating now or that will be pollinating in the next week under conditions of at least moderate stress -- the first yield potential estimates will have to wait until it is possible to count kernel numbers and get some idea of grainfilling conditions at stage R3 (roasting ear) during the last third of July.
“I wish we could be more optimistic,” said Nafziger. “The start to the growing season was outstanding, and most producers ‘did everything right’ to establish good yield potential. There’s not much we can do other than accept that the weather is beyond our control.”
- Sign-up begins for USDA disaster assistance programs
- Grain futures lagged the other ag markets Wednesday
- Pacific Coast Terminals and K+S Potash Canada sign agreement
- Soy, cotton futures led the ag markets Wednesday morning
- Monthly fertilizer prices: Comparing 2014 through 2009
- USDA releases April water supply forecast for the West
- Commentary: Blame anti-GMO groups for deaths
- Julie Borlaug says biotech is necessary in fight against hunger
- Climate change will reduce crop yields sooner than we thought
- What does “sustainable” food and agriculture really mean?
- Ohio bill to require certification to apply fertilizer
- Carbon-dioxide hurts nitrogen assimilation by plants