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Crops in this Family: Corn, Wheat, Rice, Sorghum, Durum Wheat, Sugarcane, Barley, Oats, Rye, Timothy Grass, Canary Seed, Millet, Orchard Grass
Below is a tissue nutrient sufficiency table for the Grass Family (Poaceae), encompassing macro- and micronutrients, leaf water content (LWC), and Brix values across key growth stages. This table is generalized for common agricultural grasses (e.g., wheat, corn, rice, or pasture grasses like perennial ryegrass), as the Grass Family includes diverse species with varying nutrient needs. Data are synthesized from agricultural research on grasses (e.g., wheat and corn sufficiency ranges from sources like Kansas State University, Iowa State University, and regenerative agriculture insights), adjusted for typical grass physiology.
Growth stages are defined as:
- Vegetative (emergence to tillering)
- Stem Elongation (jointing to booting)
- Reproductive (heading to flowering)
- Grain Fill to Maturity (seed development to ripening).
- Harvest
Nutrient concentrations are in percentages (%) for macronutrients and parts per million (ppm) for micronutrients, with LWC as a percentage of fresh weight and Brix (°Bx) as soluble solids in leaf sap.
| Growth Stage |
N (%) |
P (%) |
K (%) |
Mg (%) |
Ca (%) |
S (%) |
||||||
|
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
|
|
Vegetative |
4.00 |
5.00 |
0.30 |
0.50 |
2.50 |
3.50 |
0.20 |
0.40 |
0.30 |
0.60 |
0.20 |
0.40 |
|
Stem Elongation |
3.00 |
4.00 |
0.20 |
0.40 |
2.00 |
3.00 |
0.20 |
0.40 |
0.30 |
0.60 |
0.20 |
0.30 |
|
Reproductive |
2.50 |
3.50 |
0.20 |
0.40 |
1.70 |
2.50 |
0.20 |
0.40 |
0.30 |
0.60 |
0.20 |
0.30 |
|
Grain Fill |
1.50 |
2.50 |
0.10 |
0.30 |
1.50 |
2.00 |
0.20 |
0.40 |
0.30 |
0.60 |
0.10 |
0.30 |
|
Harvest |
1.00 |
2.00 |
0.10 |
0.30 |
1.00 |
2.00 |
0.20 |
0.40 |
0.30 |
0.60 |
0.10 |
0.30 |
|
B (ppm) |
Zn (ppm) |
Mn (ppm) |
Fe (ppm) |
Cu (ppm) |
Mo (ppm) |
|||||||
|
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
|
|
Vegetative |
6 |
25 |
20 |
70 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Stem Elongation |
6 |
25 |
20 |
70 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Reproductive |
6 |
25 |
20 |
70 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Grain Fill |
6 |
25 |
20 |
70 |
20 |
100 |
50 |
150 |
5 |
15 |
0.10 |
1.00 |
|
Harvest |
5 |
20 |
15 |
50 |
20 |
75 |
30 |
120 |
4 |
10 |
0.10 |
1.00 |
|
LWC |
BRIX |
|||||||||||
|
Min |
Max |
Min |
Max |
|||||||||
|
Vegetative |
85 |
90 |
8 |
12 |
||||||||
|
Stem Elongation |
80 |
88 |
10 |
15 |
||||||||
|
Reproductive |
78 |
85 |
12 |
16 |
||||||||
|
Grain Fill |
70 |
80 |
8 |
12 |
||||||||
|
Harvest |
70 |
75 |
8 |
12 |
||||||||
Scanning Recommendation:
- Leaf selection should be similar to that of Corn or Wheat.
- Ensure that over 25% of the scan bed is covered with a single layer of vegetation.
