Soybeans!!!. Soil Fertility -pH of 6.2 to 7.0 -pH controls: lime (acid), anhydrous ammonia (base) -Potassium - 1.4 lbs. per acre -Phosphorous -.8 lbs.

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Presentation transcript:

Soybeans!!!

Soil Fertility -pH of 6.2 to 7.0 -pH controls: lime (acid), anhydrous ammonia (base) -Potassium lbs. per acre -Phosphorous -.8 lbs. per acre -Nitrogen: from atmosphere and soil nitrates

Excess nitrogen -slows and even stops nitrogen fixation by soybean plant.

Harvest by combine, using platform header

Drying Purpose: prevent mold, longer storage life.

Drying Requirements Ideal is 13%-16% moisture -12%-20% is acceptable -Temperature < 110º F

Soybean Diseases -Phytophthora Root Rot -Sclerotinia Root Rot -Brown Stem Rot -Phomopsis seed rot -Soybean Cyst Nematode

Phytophthora Root Rot -Caused by fungus from moisture -First seen in Ohio in Common in poorly drained, compacted soils.

Phytophthora Root Rot

Controlling Phtyo. Root Rot -Use of fungicides -Use resistant varieties -Use well-drained soils -Keep compaction to minimum

Sclerotinia Stem Rot -caused by sclerotinia fungus -white mold on dry beans -discovered in Nebraska

Sclerotinia Stem Rot

Sclerotinia Stem Rot Prevention -15 inch row spacing, more air circulation -Limited crop rotation, prevent spread -Using resistant varieties

Brown Stem Rot -fungus from crop residue -can reduce yields as much as 38%

Brown Stem Rot

Brown Stem Rot Prevention -Intense crop rotation -Use of no-till -Use resistant varieties -Narrow row widths

Phomopsis Seed Rot -Occurs in delayed harvest due to wet, rainy weather -Caused by three different fungi, and can survive winter

Phomopsis Seed Rot

Phomopsis 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

Soybean Cyst Nematode -microscopic roundworm, 1/64 inch in length -penetrates roots and feeds on vascular system. -can’t reproduce without host

Soybean Cyst Nematode

Soybean Cyst Nematode Prevention -crop rotation -plant resistant varieties -control weed hosts -maintain balanced fertility -plant early -clean equipment