Title: Soybeans!!!
1Soybeans!!!
2Soil Fertility
- pH controls lime (acid), anhydrous
- ammonia (base)
- Potassium - 1.4 lbs. per acre
- Phosphorous - .8 lbs. per acre
-Nitrogen from atmosphere and soil nitrates
3Excess nitrogen
-slows and even stops nitrogen fixation by
soybean plant.
4Harvest
by combine, using platform header
5Drying
Purpose prevent mold, longer
storage life.
6Drying Requirements
Ideal is 13-16 moisture
-12-20 is acceptable
-Temperature lt 110ยบ F
7Soybean Diseases -Phytophthora Root
Rot -Sclerotinia Root Rot -Brown Stem
Rot -Phomopsis seed rot -Soybean Cyst Nematode
8Phytophthora Root Rot
-Caused by fungus from moisture
-First seen in Ohio in 1951
-Common in poorly drained, compacted soils.
9Phytophthora Root Rot
10Controlling Phtyo. Root Rot
-Use of fungicides
-Use resistant varieties
-Use well-drained soils
-Keep compaction to minimum
11Sclerotinia Stem Rot
-caused by sclerotinia fungus
-white mold on dry beans
-discovered in Nebraska
12Sclerotinia Stem Rot
13Sclerotinia Stem Rot Prevention
-15 inch row spacing, more air circulation
-Limited crop rotation, prevent spread
-Using resistant varieties
14Brown Stem Rot
-fungus from crop residue
-can reduce yields as much as 38
15Brown Stem Rot
16Brown Stem Rot Prevention
-Intense crop rotation
-Use of no-till
-Use resistant varieties
-Narrow row widths
17Phomopsis Seed Rot
-Occurs in delayed harvest due to wet, rainy
weather
-Caused by three different fungi, and can survive
winter
18Phomopsis Seed Rot
19Phomopsis Seed Rot Prevention
-crop rotation with wheat and corn
-Seed treatment for seed lots with low levels
of infection (70 to 90 germination)
-plow down crop residues for fields with
heavy disease pressure
20Soybean Cyst Nematode
-microscopic roundworm, 1/64 inch
in length
-penetrates roots and feeds on vascular system.
-cant reproduce without host
21Soybean Cyst Nematode
22Soybean Cyst Nematode Prevention
-crop rotation
-plant resistant varieties
-control weed hosts
-maintain balanced fertility
-plant early
-clean equipment