What is the difference between specific gravity and Haugh units in measuring brown egg quality?

Specific gravity and Haugh units measure two completely independent aspects of egg quality. Specific gravity is typically measured using the salt-bath flotation method (varying salt solutions from 1.060 to 1.100 density) or electronic gauge. A high specific gravity (above 1.080) indicates a thick, strong shell that is highly resistant to transit cracks. On the other hand, the Haugh unit is an index of internal quality, calculated from egg weight and albumen height. While Specific Gravity is crucial for wholesalers concerned with transport losses, Haugh units are vital for retailers concerned with shelf life and consumer yolk presentation. Farmers can learn lab testing methods in the Poultry Encyclopedia, source testing instruments on Poultry Plaza, monitor daily rates on Poultry Rates, and sell graded premium stocks on Murghi Mandi.