Crop Identification - Alfalfa
Transcript of Crop Identification - Alfalfa
Crop Identification - Alfalfa Deep taproot and well-
developed crown Much branched stems up to 3
feet tall 3 leaflets in a pinnately
compound leaf, pubescent, with serrations on outer l/3 of leaflet
Flowers yellow or purple, raceme inflorescence.
Seed is borne one to several in a spiral pod
Kidney to mitt shaped Yellow to green to light brown,
turning dull reddish-brown with age.
Crop Identification – Red Clover Short-lived perennial acting as a
biennial Taproot system erect, branching
habit from a crown Stems pubescent; leaves palmately
compound, pubescent, with white variegation
Stipules prominent, with distinct green to reddish veining
Reddish flowers in head-type inflorescences at end of branches.
Seed is lemon-yellow to violet, with prominent nose nearly half as long as seed, giving appearance of boxing glove; a sample of seed will have a purplish cast.
Crop Identification – White Clover Stolon root system
Stems prostrate rooting at the nodes
Palmately compound leaf supported by erect petiole
Variegations on leaflets
White dense flower head on erect peduncle.
Seed is small, canary yellow to brown colored, and heart-shaped.
Crop Identification – Hairy Vetch Winter annual
Stems weak, pubescent, twining
Leaves pubescent, pinnate with 12-20 leaflets, terminating in a tendril
Flowers lavender, several to a raceme
Dehiscent seed pod, with 3 to 8 spherical, dull black (l/8 inch in diameter) seeds.
Crop Identification – Tall Fescue Cool season perennial
bunchgrass Stem erect, 2 to 3 feet tall Leaf with glabrous sheath,
blade flat, with rough upper surface and margin
Inflorescence an open panicle, with few to many florets per spikelet.
Seed is l/4 to 3/8 inch long, retains lemma and palea in threshing
Rachilla slender and found with cupped knob.
Crop Identification - Ryegrass Cool season bunchgrass Stem erect, 2 to 3 feet tall Leaf glossy on upper surface,
blade flat, and narrow, small auricles, glabrous sheath
Short membranous ligule Inflorescence is a slender spike
with spikelets attached edgeways to rachis.
Seed is somewhat flattened, about l/4 inch long, does not thresh free
Lemma awned, rachilla wedge-shaped, lies close to lemma.
Crop Identification - Kentucky Bluegrass
Perennial cool season grass Spreads by rhizomes Stems erect Leaf blade smooth, flat, or
folded, ends in a boat-shaped tip
Panicle type inflorescence 4-5 branches at lower node, spikelets crowded at ends of branches.
Seed is less than l/8 inch long, does not thresh free, persistent rachilla.
Crop Identification – Smooth Bromegrass
Perennial, cool season grass
Spreads by rhizomes
leaves smooth, with closed sheaths
Inflorescence is an open, erect panicle with elongated spikelets, no awns.
Seed is about 3/8 inch long, flattened, dark brown caryopsis shows through lemma and thin palea.
Crop Identification - Orchardgrass Perennial cool-season bunch
grass
Flattened leaf sheaths long membranous ligule
panicle-type inflorescence, with spikelets clumped at ends of few stiff branches; spikelets 2 to 5 flowered.
Seed does not thresh free; awn-pointed
Rachilla present
Lemma appears as if tip has been twisted quarter turn.
Crop Identification - Sudangrass Annual grass 6 to 8 feet
tall
Thin corn-like appearance
Inflorescence medium to large open panicle type.
Seed is brown, usually enclosed in golden-tan to purplish colored glumes; pedicels are not knobbed.
Crop Identification - Wheat Annual grass
Auricles wrap sheath
Stems 2-3 feet tall
Spike-type inflorescence; awned or awnless often 3 or more fertile florets per spikelet.
Seed hotdog bun shaped threshes free of lemma and palea.
Barley has very long and prominent auricles that clasp around the stem. The ligule is relatively short and inconspicuous. Waxy-coated leaves.
Wheat has short, slender, hairy auricles. The ligule is rounded.
Rye has very short, sharp pointed auricles with a hairy sheath and a small inconspicous ligule.
Oat auricles are absent and both the shealth and leaf margins have hairs. The ligule is relatively large and flat topped.
Crop Identification - Rye Winter annual
Stems 3-4 feet tall
Spike-type inflorescence long, slender, often drooping
Short awns; kernels partly exposed from glumes.
Seed size varies from small and slender to large and plump; color from light brown to greenish to dark brown.
Crop Identification - Barley Annual grass
Spike-type inflorescence; usually awned; 3 spikes per rachis node.
Six-row barlet all spikelets fertile, 2/3 of kernels have curved suture, l/3 straight
Seed - lemma and palea attached, awn broken in threshing:
Crop Identification - Oats Annual grass
Stems 3 feet tall
Leaves twisted counter clock wise
Open panicle-type inflorescence spikelets with large, papery glumes
Seed - plump; yellow, gray, or red, depending on variety
Lemma and palea do not thresh free
Awns, if present, attached to back of lemma.
Crop Identification Grain Sorghum Annual drought tolerant
grass
Corn-like appearance
Prominent midvein
Inflorescence is a panicle-like raceme; semi-compact; dark glumes.
Seed is round 3/32 inch in diameter, usually a rust-red or reddish brown in color.
Crop Identification – Pearl Millet Annual grass with
bunched habit Some to many tillers Leaf blades are long with
rough edges and a distinctive midrib
Ligule is large and hair-like. Inflorescence is a cat tail-like spike
Seed is small round and tan in coloration.
Seed threshes free of its rachilla on harvest.
Weed Identification – Canada Thistle
Perennial creeping roots extend several feet deep and several feet horizontally
Stems 2 to 5 feet tall, becoming increasingly hairy as they mature
Leaves dark green on upper side, grayish underside, usually with crinkled edges and spiny, somewhat lobed margins
Inflorescence 3/4 inch or less in diameter, composed of several lavender flowers and surrounded by bracts without spiny tips.
Seed - light brown, slightly tapered, about 3/16 inch long, with a ridge around the blossom end, almost banana-shaped.
Weed Identification Field Bindweed
Extensive perennial root system Stems smooth, slender, 2 to 7
feet long, and vine like Leaves ovate with spreading
basal lobes Flowers are funnel-like white or
pink colored, about 1 inch across Flower stalk has 2 bracts l/2 to 2
inches below the flower. Seed is brownish-gray, rough,
about l/8 inch in diameter, with 1 rounded and 2 flattened sides
Weed Identification - Johnsongrass Perennial grass with creeping
rhizomes and fibrous root system
Stems erect, l l/2 to over 6 feet tall
Leaves alternate, simple, 6 to 20 inches long l/2 inches wide
Open panicle type inflorescence.
Seed is nearly 1/8 inch long, oval, yellow to reddish-brown, with fine lines on the surface
Two knobbed rachilla are on each floret.
Weed Identification – Hoary Cress Perennial, roots deep, slender,
extending horizontally and vertically as much as 10 feet
Stems 1 to 1 1/2 feet tall, branching at top
leaves on lower stem spatulate, tapering to a slender base, upper leaves sessile covered with whitish pubescence.
Leaf margins wavy with shallow indentation
Flowers white, 4 petaled, small; borne in flat-topped clusters
Seed pod 2-parted, heart shaped. Seed is oval, rough about 1/16 inch
long, reddish-brown.
Weed Identification – Perennial Sowthistle
Perennial, roots extend several feet horizontally and vertically produce shoots from buds
Stems smooth, 3 to 7 feet tall, erect Milky juice exudes when stem is
broken Leaves are 4 to 8 inches long,
alternate, irregularly toothed, lobed, with spiny edges
Inflorescence up to l l/2 inches across, composed of several deep yellow flowers.
Seed - brownish, slender, about 1/8 inch long, slightly flattened, 5 to 7 longitudinal ribs running the length of the seed, a tuft of hair on one end that is easily broken off.
Weed Identification - Quackgrass Perennial grass with a sharp
pointed white rhizome Stems ½ to 3 feet tall; with
smooth culms and 3 to 6 nodes; Leaves with auricles, short
ligule, hairy lower sheaths, upper sheaths nearly glabrous;
Spike is composed of several spikelets with 3 to 7 short-awned florets.
Seed does not thresh clean, florets usually thresh in small clusters rather than singly
Rachilla oppressed to palea.
Weed Identification - Wild Garlic Perennial bulb roots small, at
base of bulb Stems 1 to 3 feet tall, smooth,
waxy Leaves slender, hollow, nearly
round, attached to lower half of stem
Aerial bulblets form in a cluster at top of stem are oval and smooth with shiny covering
Flowers greenish-white, small, on short stems above aerial bulblets.
Seed - black, flat on one side, about 1/8 inch long; formed only occasionally.