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Category: Crop physiology

Different developmental stage of corn ear

Different developmental stage of corn ear

This post is the summary of the article, ‘Ear Initiation & Size Determination in Corn’ by prof. Bob Nielsen in Purdue University, and therefore all storytelling in this post is based on the article. In a corn plant, kernel number of per ear (KN) is an important contributor to the grain yield potential. Therefore, developmental stage of corn ear is the critical period to determine KN. Environmental stress during ear development may limit the potential ear size, and therefore final…

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Why plants at the front are always smaller than others inside plot?

Why plants at the front are always smaller than others inside plot?

Why plants at the front are always smaller than others inside plot? If there is a border effect, it’s likely to be taller. This mainly results from more soil compaction and also might be due to competition against grasses. Furthermore, N fertilizers would be less supplied at the front where the applicator just starts to apply N.

Current corn stage (19 July 2022) at Guelph in Ontario, Canada

Current corn stage (19 July 2022) at Guelph in Ontario, Canada

Sowing date: 12/05/2022 Today: 19/07/2022 (69 days from sowing) Current stage: V13-V14 Site: Guelph, Ontario, Canada Now corn is reaching to VT. Sooner or later, tassels will come out and also corn silk will appear. Now it’s so drought. When corn goes through drought stress, they roll up leaves to protect water loss. So, when you stand in corn field, you can see upper leaves look like sharp. Lower leaves start to be senescent.

Current corn stage at Guelph in Ontario, Canada

Current corn stage at Guelph in Ontario, Canada

Sowing date: 12/05/2022 Today: 28/06/2022 (61 days from sowing) Current stage: V7-V8 Site: Guelph, Ontario, Canada Today is 61 days from sowing corn in Guelph. The current stage of corn is between V7 and V8. From now on, the demand of nitrogen in corn will be increased. Therefore, it would be important to track down the current stage of corn continuously. Agronomy study is always fascinated!!