436 GENETICS IN RELATION TO AGRICULTURE 



Minimum Standards Recommended for Varietal and Similar Teals with Corn. 



Duration of trials: Five seasons. 



Size of plots in plot-tests: Five rowy each of twenty-five hills or each 5 rods long. 

 Outer two rows to be discarded. 



Length of rows in row-tests: Twenty-five hills or row 5 rods long. 



Number of checks: Every fifth plot or every fifth row. 



Number of replications: Five times in rows; at least twice, preferably 3 times, in 

 plots. 



In row tests only closely similar varieties should be in contiguous rows. 



Minimum Standards Recommended for Varietal and Similar Tests with Small 

 Grains. 



Duration of trials: Five seasons. 

 Plot tests: 



Size of plots: }fa to ^o acre. 



Number of replications: At least twice, preferably 5 times. 



Number of checks: Every third plot. 



Margins on outside plots: There should be a border of at least 3 feet to dis- 

 card. Paths or division strips are preferably avoided when possible. 



Blocks: Square, so as to permit changing the direction of the plots from season 

 to season. 



Shape of plots: Long and narrow. Each season the series of plots should be laid 

 out at right angles to the previous plots. 



Previous crops: The record for 3 years should be given. 

 Row Tests: 



Length of rows: One rod or more. 



Distance between rows: Six to 10 inches. 



Method of seeding: Drilled at optimum rate of seeding under field conditions. 



Rate of seeding: To be indicated. 



Checks: Every fifth row. 



Replications: Ten times. 



In row tests the outside row should always be discarded. 



