1. Daryl Bowman

2. D.C. Erbach, D.E. Wilkins, and W.G. Lovely Agronomy Journal 65:702-704

3. FINDINGS LOOKING AT IMPROVING YIELD BY IMPROVING PLANT SPACING UNIFORMITY ON A FIELD SCALE, WITH CORN PLANTED ON 38” ROWS, IMPROVING INTRA-ROW PLANT SPACING MAY NOT SIGNIFICANTLY IMPROVE TOTAL YIELD

4. Emerson D. Hafziger, Paul R. Carter and E.E. Graham Crop Science 31:811-815

5. MATERIALS AND METHODS 7 ENVIRONMENTS ILLINOIS AND WISCONSIN TWO HYBRIDS HAND PLANTED AT 3 DIFFERENT TIMES TO SIMULATE UNEVEN EMERGENCE

6. RESULTS LATE-EMERGING PLANTS DID NOT CAUSE YIELD LOSS COMPARED TO INCOMPLETE STANDS UNEVEN EMERGENCE DID CAUSE YIELD LOSS NO BENEFIT IN REPLANTING UNLESS LESS THAN HALF STAND

7. J.M. KRALL, H.A.ESECHIE, R.J. RANEY, S. CLARK, G. TENEYCK, M. LUNDQUIST, N.E. HUMBURG, L.S. AXTHELM, A.D.DAYTON, AND R.L. VANDERLIP. AGRONOMY JOURNAL 69:797-799

8. MATERIALS AND METHODS 4 YEARS 3 IRRIGATED LOCATIONS MEASURED WITHIN-ROW VARIABILITY AND CALCULATED SD

9. RESULTS GRAIN YIELDS DECREASED WITH INCREASED IN-ROW VARIABILITY

10. G. CARLSON, T. DOERGE, AND D. CLAY SITE-SPECIFIC MANAGEMENT GUIDELINES 37

11. CONCLUSIONS EXPECT A SD OF 2 INCHES AS THE BEST THAT A CORN FARMER CAN ACHIEVE YIELDS CAN BE EXPECTED TO GO DOWN WITH SD ABOVE 2.0 INCHES

12. R.L. NIELSEN DEPT. OF AGRONOMY,PURDUE AGRY-91-01

13. CONCLUSIONS A SD OF 2 INCHES IS ABOUT THE BEST ONE CAN EXPECT

14. R.L. NIELSEN PURDUE

15. MATERIALS AND METHODS TWO CORN HYBRIDS ONE FLEX EAR HYBRID ONE FIXED EAR HYBRID ONE YEAR 5 LOCATIONS 5 PLANT SPACINGS GIVING VARYING UNIFORMITY

16. RESULTS HYBRID X VARIABILITY INTERACTION AT 3 OF 5 LOCATIONS NO CONSISTENT HYBRID DIFFERENCE WHERE INTERACTIONS OCCURRED UNEVEN PLANT SPACING DID NOT FAVOR ONE HYBRID OVER THE OTHER CONSISTENTLY

17. D. T. BOWMAN CROP SCI. 27:1231-1234

18. MATERIALS AND METHODS 10 RANDOM HYBRIDS IN 3 MATURITIES 7 ENVIRONMENTS THINNED TO A STAND VERSUS PLANTING TO A STAND AT 110%

19. THINNING RESULTED IN MORE UNIFORM STANDS MATURITYTREATMENTGRAIN YIELD% STANDSD EARLYTHIN54559610.3** NO THIN54019611.3 MEDIUMTHIN79919810.5** NO THIN79569812.3 LATETHIN6525100**11.5** NO THIN644610413.5

20. NO SIGNIFICANT ENTRY X TRT INTERACTION MATURITYDFMS EARLY9574471 error120486084 MEDIUM9699373 error135504835 LATE9546082 error120686359

21. CONCLUSIONS THINNING RESULTED IN A MORE UNIFORM STAND THIS DID NOT RESULT IN A HYBRID X TREATMENT INTERACTION I.E. THE BEST HYBRIDS WERE ALWAYS ON TOP AND THE DOGS WERE ALWAYS ON THE BOTTOM

22. MY CONCLUSIONS NO ONE HAS SHOWN A CONSISTENT HYBRID X SPACING INTERACTION ALL ENTRIES ARE TREATED THE SAME IN OVTs SURE PERFECT SPACING MAY INCREASE YIELDS BUT NO ONE HAS SHOWED VARIABLE PLANT SPACING AFFECTS RELATIVE CORN PERFORMANCE