An alternate method is to measure a 5' x 10' square and count all the plants within the square. This method can be used for all row spacings. print friendly Population Plants per 5' x 10' square Multiplier 14,000 16 .70 15,000 17 .75 16,000 18.5 .80 17,000 19.5 .85 18,000 21 .90 19,000 22 .95 20,000 23 1.00 21,000 24 1.05 22,000 25 1.10 23,000 26 1.15 24,000 27.5 1.20 25,000 29 1.25 26,000 30 1.30 27,000 31 1.35 28,000 32 1.40 29,000 33 1.45 30,000 34 1.50 31,000 35.5 1.55 32,000 37 1.60 Head Diameter - Measure the diameter of an average head.   Head Diameter Multiplier 4.5 .37 5.0 .46 5.5 .55 6.0 .64 6.5 .73 7.0 .82 7.5 .91 8.0 1.00 8.5 1.09 9.0 1.18 9.5 1.27 10.0 1.36 10.5 1.45 11.0 1.54 back   Copyright © 2005 Nestibo Agra Inc. All rights reserved. Powered by:  World Wide Web Manitoba