1 = Poor; 5 = Excellent
Compaction Alleviation: 1
Weed Suppression: 3
Biomass Production: 3
Erosion Control: 4
Disease/Pest Control: 3
P & K Cycling: 3
Ease of Establishment: 4
Nitrogen Fixer/Scavenger: Scavenger
Values Vary Greatly Depending on Maturity
Crude Protein: 18
NEL¹ Mcal/lb.: .60
DM Tons/Acre: 3-5
Days to First Harvest: 35
Days to Next Harvest: 25
¹- Net Energy for Lactation = Energy available after subtracting digestive and metabolic losses
²- Acid Detergent Fiber = Low values mean more digestible
³- Neutral Detergent Fiber = Low values mean cows can eat more
Ranking (Good, Better, Best):
Graze: Not Rated
Mono (lbs./acre): 8-12
Mix (lbs./acre): –
Forage (lbs./acre): 8-12
Aerial (lbs./acre): NR
Carbon/Nitrogen Ratio (C:N): Vegetative-20:1
Seeding Depth (in./with drill): 1/4
Bulk Density (lbs./ft.³): –
Aerial Application Rate: Not Rated
Germination Soil Temp.: 65 F
USDA Hardiness Zone: Frost
Days to Emergence: 3-5
Teff is mainly utilized for hay in pure stands or as an emergency hay crop. Other uses include grazing, silage, erosion control and green manure.
Teff is easy to establish due to its rapid germination (3-6 days) provided seed is planted in a firm seedbed and soil temperature is 65°F or higher. Seeding rates are 8-12 coated lbs./acre or 4-6 raw lbs./acre at a seeding depth of 1/8-1/4 in. Planting deeper will usually result in a complete stand failure. Stand failures may also occur when planting after small grains unless the stubble is thoroughly incorporated into the soil. Initial growth is slow until a good root system has been established.
In general, 50 lbs. of nitrogen/acre every year at planting will be adequate for good forage production. Small amounts of nitrogen may be needed after each cutting, however too much nitrogen causes severe lodging. Soil testing is important since teff needs adequate phosphorous, potassium and sulfur for optimum growth. For optimum forage quality, teff should be harvested in the pre-boot to early boot stage, approximately 45-50 days after planting at a cutting height of 3-4 in. Harvest regrowth in 30-45 days depending on environmental conditions.
Nitrate Toxicity is common when fertility or manure applications are followed by a period of drought or stress. Cut plants do not lessen in their nitrate levels as they cure. If high levels are suspected, forage should be tested for a period of a few weeks until levels subside. Though often linked to summer annual grasses, increased nitrate levels can show up in most cover crops and forages.
- Nitrates are concentrated more in the lower stalk– raising cutting height can reduce the risk
- When a stressful drought precedes a moisture event, it is recommended to delay harvest by 1-2 weeks
- Consider split applications of nitrogen (especially useful on summer annuals) to decrease nitrate accumulations
Prussic Acid poisoning can occur when feeding forage sorghums after periods of drought or other stress, including frost. Toxic levels dissipate usually after 2-3 weeks and will further decrease when ensiled. Prussic acid is most concentrated in new growth, so sorghum forages should not be grazed until they are at least 18 in. tall. Storing hay or silage for at least 30 days generally dissipates the concern.
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