Site

Nitrogen applied
lb/a

Yield > 1 7/8” cwt/a

% Yield > 1 7/8” %

Mis-Shapen
Tubers %

Specific
Gravity

Imperial

160

357 AB*

86 B

2 B

1.065 A

O’Neill

310

400 A

88 B

4 B

1.071 B

Scottsbluff

160-205

319 B

95 A

19 A

1.073 A

Clone

Imperial

O’Neill

Scottsbluff

Means

standard

272 c*

298 B

264 bc

278 C

CO #3

369 ab

458 a

328 abc

385 A

CO #8

345 abc

460 a

387 a

397 A

TX #102

306 bc

357 ab

251 c

305 BC

TX #112

434 a

382 ab

319 abc

379 A

TX #223

368 ab

416 a

341 ab

375 A

TX #278

385 ab

452 a

343 a

33 A

TX #296

390 ab

363 ab

317 abc

356 AB

Note: Nitrogen applications were @ Imperial 160 #N/a, @ O’Neill 310 #N/a, and @ Scottsbluff 160 #N/a in 1999 and 205 #N/a in 2000 and 2001.

*Numbers in columns not followed by same lower case letter are significantly different at the 90% probability level and numbers not followed by same upper case letters significantly different at the 95% probability level.