Figure 3: Embryo, shell, and shuck development

Figure 3: Embryo, shell, and shuck development of ‘Kanza’ (a) and ‘Pawnee’ (b) cultivar in Perkins. The lower x-axis is the sampling date and the upper x-axis is the heat unit calculated from bloom with a base temperature of 44.6 degrees Fahrenheit. The three elements show slow nut growth at earlier stages and increase growth at later stages between 1200 to 2000 heat unit, which lasts through the water stage and gel stage. Embryo initiates later than shuck and shell; the growth of which is visible at 730 heat unit in ‘Kanza’ and 770 heat unit in ‘Pawnee.’ Shell size dropped above 2300 heat unit.

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