The sunflower yield for oil sunflower, can be calculated by the number of plants per acre, the head diameter, the seed size, the number of filled seeds per head, observing how much of the center of the head is filled, and estimating the damage done by birds.
The term “plant stress” is used when conditions interfere with normal plant growth. Some of the recent stress factors have been a frost event at the end of May, continued dry conditions throughout the state, and extreme heat for the time of the year.
During the early morning of Friday May 28, 2021, frost occurred in many parts of North Dakota and northwestern Minnesota.
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North Dakota State University is distinctive as a student-focused, land-grant, research university. NDSU Agricultural Affairs educates students with interests in agriculture, food systems and natural resources; fosters communities through partnerships that educate the public; provides creative, cost-effective solutions to current problems; and pursues fundamental and applied research to help shape a better world.