Measured crop performance cotton 1955

Research Report No. 19 December, 1955

Measured -crop performance

COTTON

1955

w.

H. RANKIN, Research Associate Professor In Charge Variety Testing

and

F. W. BRITTAIN, Research Instructor

Department of Agronomy N. C. State College

rNTRODUCTION

Variety evaluation trials are co~ducted annually on farmer fields by

the records ot perrorne nco

or

cor ron varieties in general use as well as

those yet to be releas~d by ~he breeder.

T~ ~

r

L~~>~i,TIONS

The tests were conducted at three locations in

1955,

two in the Coasta f Pl eIn ar e a G:ld one in th9 Pie(~mont.

Rocords eccurnvie t e o fc,- s overe l ~)E'3scns indicate which varieties are

capebl2 of p~0ducing consistently superior yields as wefl as having other aesirod ~ua'i~!es.

The teating agency recognizes the cooperative spirit and civic-minded

ssr-vicc !en(~0r9d by t :-Ie -(e.r.r.er::; who f urnisoe d the fa-vd, prepared the sol l ,

cult ivete d :-he crop and arj:'l~ ir. harvestinq it. The agerc'y' e lso recognizes

t J-,e f; re cooperet ion of t ha County Agents who assjsted in rocating te st 5 ii"es

and observing these tests.

The tr:a!s were cond~cted as fol lows:

In Anson County on the farm of W. H. Waddel I~ Wadesboro, Rt. 10 County Agent, J. R. Potter and Assistants cooperating_

In Robeson County on the farm of J. Qc Parnel I and crop grown by

Daniel C. Bunnells, Parkton, I'J. C.

County Aqent, O. P. Qvens and assistants cooperating.

In V~la,/ne County on the farm of Luther va l l and crop grown by

lsaac ""'ur;ver, Pikevi

"e,

N. C.

Cour.r_{y Aaent ,} Go M. GoForth and assistants cooperating.

-AGEN.C I ES SPONSOR' NG ENTRfES

Coker Pedigreed Seed Co., Hartsvil Ie,

s. c.

~orth Carolina AgricuJturaJ Experiment Station

MANAGEMENT OF TEST FIELDS

Cultural practices, such as seed bed preparation, date of planting

J

fertilIzatTon, cultivation and borl weevil control measures were in accord with good farm practice and were the same for al ( entries in a given test.

Planting, thinning, pfcking and yield measurements were directly

supervised hy personnel of North Carolina Agricultural Experiment Statron~ Samples for number of bolls per pound) lint percentage, and staple length were obrained immediately prior to picking.

Samples for these determinations were processed Tn the research laboratories of N. C. Agricultural Experiment Station.

The so; Is used fer these tests were relatively free of wl It,

there-fore ~i It 5usceptibi lity records are not avai fable.

CRITERIA USED FOR EVALUATING COTTON VARIETIES

Yield of seed cotton per acre was obtained by picking sfx replicates of each variety, using 1/200 acra plots, obtaining the mean and multtplying

by 200.

Lint percentage was determined from two samples of seventy five bol Is

each for each variety.

Lbs. of lint per acre calculated using plot yields of seed cotton and

lint percentage figured~

Number of bolls requTred to make one pound of seed cotton was determined by wefghing two samples each seventy-five bol Is.

Staple length was determined on ginned samples by licensed cotton

SEASONAL COt·jD' T I ON S

Seasonal conditions for cotton production were very good from Apri r

15,

planting time, unti I August 10 when very heavy and frequent

rainfall occurred for approximately

30

days.

Good stands were obtained and excel lent bol I set preval led In the tests prior to the stor ms of Auqusr and Septpmber. During late August and September high rain~alI favored certain insects and diseases; hence there was extensive deterioration, resulting in reduced yields and low grada cotton.

Tha jn~9ct damage was very severe in Roheson County and t~e exc~ss;ve vegetative g!owth caused the few remaining bol Is to decay during t~e period of high rainfal I; therefore records obtained are so meoger and general ly abnormal that they are not included In the report.

_ _ _ _ _ __ A' _

Records of the

1955

cotton trials are given for two locations, one in the Piedmont and one in the Ccastal Plaino

One years record at a single location may not portray the true per-formance of a variety ove~ a wice range of s~asonaJ conditjons~ Records of

longer duration are usuer Iy more depenrlable. Therefore, records on the

varieties that have been evaluated for two and three years are also reported.

DrF~~R:NC~S

IN YIELD

---...-.--...-..

_-._---Small d:fferences ln yields should be considered cautiously since it is not possible to derermine absolute performing abi lity.

The size of difference that may have been due to chance has been computed

and listed at t:,e end of each table of

1955

yield data as "L.SoD." meaning "least significant difference". A similar value is not listed for records of

longer duration but the level for significance wf I I be somewhat smaller. The

-measures of chance difference should remind the reader not to over emphasize

small differenceso

CH00SlNG A COTTON

---Now varieties of cotton are being developed that produce yreJds and possess qualities equal to v~rieties now in most general use.

Cotton producers should be constantly on the alert for varieties that excel J In yield and other characteristics thct influence more profitable production: However, individuals and c~mmunities should consfder carefully the performance records before changing or bringing In new and untrierl varieties.

In choosing a cotton variety that is most 11kely to produce superior

yIelds and qualities, a nu~ber of charccteristics must be considered~ For

example: varieties that possess little or no

w;

It resistance may be very undesirable if rhe so l ( is infected with wiIt orqanisrns, LIkewise, large

bol l s are very important for efficient hand picking whi Ie this characteristic may be relatively unimportant if the cotton is harvested mechanical Iy~

CL,~ssrFICAT'ON OF COrrON VARIETIES FOR V~ILT RESISTANCE

Resistant Ccker lOa wilt

PIajns

Emprje P-502

N,.,n-resistant Stone vlfie 28 C,.,bal

Early Fluff

Data Non-avai lable

Tennessee 89

"".oore's

#1

Moore~s ~/~33

Entries

Coker 100

w:

It BRS Early Fluff

Empire P 502 Plains

Coker )00

Wi

It BRS

ttoore' 3 =#=I

ttoore1s SpeciaI

*Coker L. H.

5 1--24

Empire P 502

Plains Early Fluff

*Coker RH

49-

196

Moore's Big BoJ r

Moore's

33

L.S.D.

.05

*Advanced Experimentafs.

AVER~GE YISLD OF SEED COTrON

PIEDMONT

Seed Cotton Lbs.IA.ere

Cleveland Coo Anson Coo Anson Co. Average

1953

1954

1955 3 Year~

e60

846

1138 948

S9}.J. 870

775

846

820 850

843

838

864

756 891

837

77

N.S. 283

2 Yr. Ave.

846 t138

992

9

2 0

9

2

₄

9

22

7~ J040

89

2

8..~ ₈₅₇ 851

850 843 847

756

891

821+

87,1

₇₇₅

823

820 698

759

830

628

729

740

710

7

25

N.S. 283

-J955

PERFGRM/-\f\1CE CF COTTO~I VAhlETIES . ' _ H

ANSON COUNTY

Seed Stapre Borfs/Lb.

Lint Cotton

Lint

Length Of Seed

E.ltr

..

ies ~se/A Lbs ./A Percent 32nd., rn , Cotton

-Coker 100

wr

It

)955

B.R.S.

4~o r138

36

:4

82

~~~'1!·:er

100 WI

I

t

52~26

376

1044

36

34

89

,"',oora'" SpecIeI 35~· 1040

₃₄

₃₃

85

Ccke: _I~ \Vf

It

1953

B.R.S.

₃₄₅

985

35

33

73

*C0ke,· R.H.

51--ITl

340

945

36

33

89

PIC'i~ 330 891

37

33 91

~(:oh.er ~~~-Wi

It

;2~~36

3

25 902

36

34

87

Cf"b0~ 3J8 883

36

34

86

~~C,:)ker L~H..

..,,5J-..24

3J7

857

37

33

87

N;)cr-e-J"f4

-II

314

9

2

4

34

33

100

'J~Cokei" 3846~

314

898 ₃₅

₃₃

90

T~'.n~) 308

769

40

33 96

*Cjker l.H--52-27

299

830

36

33

87

Emp~ ~·e

295

843

35

33

96

Ear

Iy

"rWH-'

279

775

36

33

99

StoMvt··rte--2B

249

673

37

33

98

#.')or-~;s

33

248 710

35

32

9

2

*C:>ke'" R~~~9t'"1-')6

237

698

34

34

97

*T~"n'3 818 231

643

36

33

93

Nocret» 81g--801J 207

628

33

33

8 I'

L'»ScD. ~O5 283 Lbs

L:1~e!). .0

I

375

Lbs

Entries

Coker 100 Wi It B~R.S.

Plains

Early Fluff

Empire P 502

L.S.D • •

05

fAoore's Specia 1

ttoor efs =#=!

tsoore"5 Big 80IJ

Plains

Early Fluff

Coker

faa

Wi It

B.R.S.

fAoore'5

33

*Coker R.H.

49-19 6

*Coker L.H.

51-24

Emp're P 5('2

L. S.D.

.05

*Advanced Experimentals.

AVERAGE Y' ELO OF SEED COTTO~'J

COASTAL PLAfN

Seed Cotton Lbs ,/,I\,cre

2 Tests 2 Tests J

Test

Ave)3 Yrs.

1953 f9~L

_.J252-.

5

Tests

1586

r466

88r 131 J

1526 13!4

J067

1302

1384

1404

953

1247

J168

1336

632

1045

257

N.

s.

294

Ave.

3

Tests

2 Yrso

1366 1169 1268

1426

J065

1246

1364

1020 1(92

1314

1067

119'

1404

953

1179

1466

881 (174

1324

965

1145

1486

74J

1114

1300

908

1104

1336

632 984

N.S.

294

J955

PERFORMANCE OF COTTON VARIETiES

WAYNE COUNTY

Seed StapIe Bol Is/Lb.

u

nt Cotton Lint Le ngt h Of Seed

Entries

~s./~

_Lhs

o/A

Percent 32ndo In. Cotton

Mcore's Special 397 J169

34

33

62

*Coker

3846

395

J098

36

34

74

Plains

395

1067

37

33

70

*Ccker

R.H.

5JcrI77

385

1040

37

33

82

M~ore's

#1

383

lo65

36

34

83

CobaI

365

f014

36

34

64

*T~nne 618

364

985

37

33

73

Tennlt

89

362

9c'4

40

33

76

N,nnrQ'~

#33

357

965

37

33

75

M"orefs Bj9 ~,JJ ~j57 In~:e

35

34

64

Early Fluff ~43

953

36

33

73

*Caker

L.H.

5j~24

336

9('8

37

34

74

*C~k-er

In"

,,'i

It 52'W13~

335

881

38

33

74

Coker J

no

wr

It J~55 B.R.S.

317

88J

36

31+

79

*C~ker

L.H.

52~27 311

s4n

37

34

72

C~ker 100.~11t 52--~h 302

796

38

33

75

Coker

roo

WT It

1953

G.R.S.

286

8J6

35

33

77

5tonevT I!f} 2f..l 263

7ro

37

33

69

*Coker R.H. 4<;>--I!)h

259

741

35

33

81

EmpIre

234

632

37

33

65

L.S.D.

&05 294