Table 3. Above ground production (lb/ac) for fertilizer treatments on moderately grazed mixed grass prairie at Central Grasslands Research Extension Center, Streeter.

Fertilizer Treatment

 

Year

Control

May 1

24 lb

P/ac

May 1

48 lb

P/ac

June 20

24 lb

P/ac

June 20

48 lb

P/ac

June 20

33 lb

N/ac

June 20

66 lb

N/ac

Cool-season

grass

2000y

2174abcd

2736abcd

3166bcd

2512abcd

2671abcd

2034abc

1936abc

2001y

2656abcd

3127bcd

2520abcd

2740abcd

2131abcd

2877abcd

3291cd

2002x

1787ab

1868ab

1717a

2036abc

1931abc

1985abc

2198abcd

2003y

2447abcd

2535abcd

2522abcd

2292abcd

2337abcd

2932abcd

3435d

Warm-season

grass

2000

36

3

1

0

1

160

64

2001

0

18

0

0

192

1

0

2002

31

2

1

0

20

2

3

2003

0

0

61

62

65

0

0

Forb

2000z

676ab

532ab

918abc

1008abc

748abc

1421bc

1169abc

2001y

973abc

439a

828abc

649ab

773abc

620ab

441a

2002x

533ab

263a

325a

306a

364a

529ab

271a

2003z

1040abc

773abc

1656a

1220abc

797abc

656ab

539ab

Shrub

2000z

367

573

69

281

541

449

390

2001xy

191

247

189

174

263

255

315

2002x

88

218

111

92

226

187

269

2003xy

265

263

166

411

279

246

224

Total

2000y

3254

3844

4156

3801

3962

4066

3561

 

2001y

3821

3833

3538

3564

3362

3755

4048

 

2002x

2441

2352

2154

2434

2542

2705

2741

 

2003y

3753

3572

4407

3986

3479

3835

4199

1Means in a plant class followed by a different letter differ (P<0.05).

2 Means in the year column in each plant class followed by a letter differ (P<0.05).