Southeastern U.S. Vegetable Crop Handbook - 2021 - 31

TABLE 6. VEGETABLE SEED SIZES
Crop
Asparagus
Beans:
small seeded lima
large seeded lima
snap
Beets
Broccoli
Brussels sprouts
Cabbage
Cantaloupes
Carrots
Cauliflower
Collards
Cucumbers
Eggplants
Endive, Escarole
Seeds/Unit Weight
13,000-20,000/lb
1,150-1,450/lb
440-550/lb
1,600-2,200/lb
24,000-26,000/lb
8,500-9,000/oz
8,500-9,000/oz
8,500-9,000/oz
16,000-19,000/lb
300,000-400,000/lb
8,900-10,000/oz
7,500-8,500/oz
15,000-16,000/lb
6,000-6,500/oz
22,000-26,000/oz
Crop
Kale
Kohlrabi
Leeks
Lettuce:
head
leaf
Mustard
Okra
Onions:
bulb
bunching
Parsnips
Parsley
Peas
Peppers
Pumpkins
Seeds/Unit Weight
7,500-8,900/oz
9,000/oz
170,000-180,000/lb
20,000-25,000/oz
25,000-31,000/oz
15,000-17,000/oz
8,000/lb
105,000-144,000/lb
180,000-200,000/lb
192,000/oz
240,000-288,000/lb
1,440-2,580/lb
4,000-4,700/oz
1,900-3,200/lb
Crop
Radishes
Rutabaga
Spinach
Squash:
summer
winter
Sweet corn:
normal and
sugary enhanced
supersweet (sh2)
Tomatoes:
fresh
processing
Turnip
Watermelons:
small seed
large seed
Seeds/Unit Weight
40,000-50,000/lb
150,000-192,000/lb
40,000-50,000/lb
3,500-4,800/lb
1,600-4,000/lb
1,800-2,500/lb
3,000-5,000/lb
10,000-11,400/oz
160,000-190,000/lb
150,000-200,000/lb
8,000-10,400/lb
3,200-4,800/lb
TABLE 7. POPULATION OF PLANTS PER ACRE AT SEVERAL BETWEEN-ROW AND IN-ROW SPACINGS
In-row spacing (in.)
2
4
36 (3 ft)
42 (3.5 ft)
48 (4 ft)
60 (5 ft)
72 (6 ft)
84 (7 ft)
96 (8 ft)
87,120
74,674
65,340
52,272
43,560
37,337
32,670
6
87,120
58,080
49,783
43,560
34,848
29,040
24,891
21,780
17,424
14,520
12,446
10,890
8
65,340
43,560
37,337
32,670
26,136
21,780
18,669
16,335
13,068
10,890
9,334
8,167
10
12
18
21
24
30
448,046 224,023 149,349 112,011 89,609
261,360 130,680
174,240
149,349
130,680
104,544
87,120
74,674
65,340
52,272
34,848
29,870
26,136
20,909
17,424
14,934
13,068
10,454
8,712
7,467
6,534
12
74,674
43,560
29,040
24,891
21,780
17,424
14,520
12,446
10,890
8,712
7,260
6,223
5,445
14
64,006
37,337
24,891
21,336
18,669
14,935
12,446
10,668
9,334
7,467
6,223
5,334
4,667
16
32,670
21,780
18,669
16,335
13,068
10,890
9,334
8,167
6,534
5,445
4,667
4,084
18
29,040
19,360
16,594
14,520
11,616
9,680
8,297
7,260
5,808
4,840
4,149
3,630
24
21,780
14,520
12,446
10,890
8,712
7,260
6,223
5,445
4,356
3,630
3,111
2,722
30
17,424
11,616
9,957
8,712
6,970
5,808
4,978
4,356
3,485
2,904
2,489
2,178
36
14,520
9,680
8,297
7,260
5,808
4,840
4,149
3,630
2,904
2,420
2,074
1,815
48
10,890
7,260
6,223
5,445
4,356
3,630
3,111
2,722
2,178
1,815
1,556
1,361
Between-row
spacing (in.)
7
TABLE 8. CRITICAL PERIODS OF WATER NEED FOR
VEGETABLE CROP
Crop
Asparagus
Beans, Lima
Beans, Snap
Broccoli
Cabbage
Carrots
Cauliflower
Corn
Cucumbers
Eggplants
Lettuce
Melons
Onions, Dry
Peppers
Potatoes (Irish)
Radishes
Southernpeas
Squash, Summer
Sweetpotato
Tomatoes
Turnips
Critical Period
Brush
Pollination and pod development
Pod enlargement
Head development
Head development
Root enlargement
Head development
Silking and tasseling, ear development
Flowering and fruit development
Flowering and fruit development
Head development
Flowering and fruit development
Bulb enlargement
Flowering and fruit development
Tuber set and tuber enlargement
Root enlargement
Seed enlargement and flowering and English
Bud development and flowering
Root enlargement
Early flowering, fruit set, and enlargement
Root enlargement
2021 Vegetable Crop Handbook for Southeastern United States
TABLE 9. AVAILABLE WATER-HOLDING CAPACITY BASED
ON SOIL TEXTURE
Soil Texture
Coarse sand
Fine sand
Loamy sand
Sandy loam
Fine sandy loam
Loam and silt loam
Clay loam and silty clay loam
Silty clay and clay
Available Water Holding Capacity
(water/inches of soil)
0.02-0.06
0.04-0.09
0.06-0.12
0.11-0.15
0.14-0.18
0.17-0.23
0.14-0.21
0.13-0.18
TABLE 10. SOIL INFILTRATION RATES BASED ON SOIL
TEXTURE
Soil Texture
Coarse sand
Fine sand
Fine sandy loam
Silt loam
Clay loam
Soil Infiltration Rate (inch/hour)
0.75-1.00
0.50-0.75
0.35-0.50
0.25-0.40
0.10-0.30
31
Southeastern U.S. Vegetable Crop Handbook - 2021

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