34 ASSOCIATED SEEDS, INC. 
PERSIAN (Shaftal) Trifolium resupinatum 
A winter annual pasture and hay clover which is becoming more popular as the demand 
for more and better legumes increases. Well adapted in the South on heavy moist clay 
soils and on irrigated land, where it yields a high tonnage of good quality hay rela- 
tively easy to cure. Has proven satisfactory as a green manure crop for soil improvement. 
Plants spreading when grazed; but erect (1-2 ft.) when thickly planted and not grazed. 
Stems leafy, fine, numerous, soft and succulent; flower heads pink, very fragrant; seeds 
about the size of White Dutch, but shiny and dark green to purple. 
SUBTERRANEAN Trifolium subterraneum 
Subterranean is an unusual winter annual clover introduced from Australia. It has prostrate 
creeping stems, and the three leaflets forming each leaf are carried on upright stalks. 
Seed stalks short, turn downward to push into soil insuring reseeding the next year. 
Produces a heavy mass of vegetation which is hard to mow, but makes excellent 
grazing and is a real soil saver. Should be seeded with the first fall rains to make as 
much growth as possible before growth is slowed down by cold weather. Thrives on 
acid soils and leached-out hillsides, but must have well drained soils. Used for grazing, 
controls soil erosion, and makes excellent hay. 
WHITE DUTCH Trifolium repens 
The most popular clover for lawn grass mixtures. Grows best in the cool moist periods 
of the fall and spring, flourishing on well-drained, moist soils high in lime content. It 
adds forage value when sown with such grasses as Dallis, Carpet, Bermuda, and Ken- 
tucky bluegrass. Plants perennial, 3-12 inches; stems fine, numerous, leafy, creeping, 
soft and succulent; developing roots at the joints. Seeds very small, yellow to red, heart 
shaped. 
CROTALARIA 
The crotalarias, of which there are several hundred species though only a few of economic 
importance, are native to subtropical and tropical regions. They require a long growing 
season, high temperatures and fairly good moisture supply. Recommended by the U. S. 
Department of Agriculture as a trap crop for nematodes, which enter the roots but are unable 
to reproduce and soon die. 
Crotalaria spectabilis (Showy) 
The most commonly grown crotalaria to furnish green manure; it is unpalatable to stock 
and may be toxic. One of the best adapted summer legumes for enriching moist sandy 
soils in the vegetable and citrus orchard sections of the South and the Rio Grande 
Valley. May yield as high as 30,000-40,000 pounds of green growth per acre. The 
stalks are hollow to slightly pithy and decay quickly when turned under. Plants annual, 
5-7 ft. tall, bushy, widely branched when spaced; quick growing and leafy. The only 
legume thus far known to be completely immune to rootknot. Responds well to irri- 
gation. Crowds out noxious weeds and grasses, and is also a valuable erosion-control crop. 

Harvesting a clover seed crop 
