EFFECT OF CORN PLANT SPACING ON OVT RESULTS

Daryl Bowman

RELATIONSHIPS BETWEEN FURROW OPENER, CORN

PLANT SPACING, AND YIELDD.C. Erbach, D.E. Wilkins, and W.G. Lovely

Agronomy Journal 65:702-704

FINDINGSLOOKING 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

RESPONSE OF CORN TO UNEVEN EMERGENCE

Emerson D. Hafziger, Paul R. Carter and E.E. Graham

Crop Science 31:811-815

MATERIALS AND METHODS7 ENVIRONMENTSILLINOIS AND WISCONSINTWO HYBRIDSHAND PLANTED AT 3 DIFFERENT

TIMES TO SIMULATE UNEVEN EMERGENCE

RESULTSLATE-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

INFLUENCE OF WITHIN-ROW VARIABILITY IN PLANT

SPACING ON CORN GRAIN YIELD

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

MATERIALS AND METHODS4 YEARS3 IRRIGATED LOCATIONSMEASURED WITHIN-ROW VARIABILITY AND CALCULATED SD

RESULTSGRAIN YIELDS DECREASED WITH INCREASED IN-ROW VARIABILITY

ESTIMATING CORN YIELD LOSSES FROM UNEVENLY

SPACED PLANTINGG. CARLSON, T. DOERGE, AND D. CLAY

SITE-SPECIFIC MANAGEMENT GUIDELINES37

CONCLUSIONSEXPECT 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

STAND ESTABLISHMENT VARIABILITY IN CORN

R.L. NIELSENDEPT. OF AGRONOMY,PURDUE

AGRY-91-01

CONCLUSIONSA SD OF 2 INCHES IS ABOUT THE BEST ONE CAN EXPECT

EFFECT OF PLANT SPACING VARIABILITY ON CORN

GRAIN YIELDR.L. NIELSEN

PURDUE

MATERIALS AND METHODSTWO CORN HYBRIDSONE FLEX EAR HYBRIDONE FIXED EAR HYBRIDONE YEAR5 LOCATIONS5 PLANT SPACINGS GIVING

VARYING UNIFORMITY

RESULTSHYBRID 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

FEASIBILITY STUDIES ON PLANTING CORN TRIALS

TO A STAND D. T. BOWMAN

CROP SCI. 27:1231-1234

MATERIALS AND METHODS10 RANDOM HYBRIDS IN 3

MATURITIES7 ENVIRONMENTSTHINNED TO A STAND VERSUS

PLANTING TO A STAND AT 110%

THINNING RESULTED IN MORE UNIFORM STANDSMATURITY TREATME

NTGRAIN YIELD

% STAND SD

EARLY THIN 5455 96 10.3**

NO THIN 5401 96 11.3

MEDIUM THIN 7991 98 10.5**

NO THIN 7956 98 12.3

LATE THIN 6525 100** 11.5**

NO THIN 6446 104 13.5

NO SIGNIFICANT ENTRY X TRT INTERACTION

MATURITY DF MS

EARLY 9 574471

error 120 486084

MEDIUM 9 699373

error 135 504835

LATE 9 546082

error 120 686359

CONCLUSIONSTHINNING RESULTED IN A MORE

UNIFORM STANDTHIS 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

MY CONCLUSIONSNO ONE HAS SHOWN A CONSISTENT

HYBRID X SPACING INTERACTIONALL ENTRIES ARE TREATED THE

SAME IN OVTsSURE PERFECT SPACING MAY

INCREASE YIELDS BUT NO ONE HAS SHOWED VARIABLE PLANT SPACING AFFECTS RELATIVE CORN PERFORMANCE