How And When To Harvest. Harvest looseleaf lettuce by 2 methods. The best way is to start picking the outer leaves of each plant when they get to be 2 to 3 inches long. Continue picking this way for 4 to 6 weeks until the plant goes to seed (the flower spike grows up out of the center--also called âbolting.â).
Blinders prevent you from seeing to the side and force you to focus on what's in front of you. A cofactor is the number you get when you remove the column and row of a designated element in a matrix, which is just a numerical grid in the form of a rectangle or a square. The cofactor is always preceded by a positive (+) or negative (-) sign, depending whether the element is in a + or - position.
â¢ Both correlation and covariance are measures of relation between two random variables. Correlation is the measure of strength of the linearity of the two variables and covariance is a measure of the strength of the correlation.â¢ Correlation coefficient values are a value between -1 and +1, whereas the range of covariance is not constant, but can either be positive or negative.t is the most commonly used correlation coefficient and valid only for a linear relationship between the variables. If r=0 no relationship exist, and if râ¥0 the relation is directly proportional; the value of one variable increases with the increase of the other.