15 CAR pt. 6, Appendix B
for Application of Commercial Fertilizers
Table 1- Protective rate of commercial P fertilizer for grasses and clover. Values in lbs P₂O₅/acre.
| Low soil test p (0-50 lbs/acre) | Med. Soil test P (50-100 lbs/acre) | High soil test P (>100 lbs/acre) | Soil test P not known | |
|---|---|---|---|---|
| Fertilizer application rate (lbs P₂O₅/acre) | 80 | 40 | 0 | 0 |
Table 2- Protective Rate of Commercial Phosphate Fertilizer for Row Crops (in lbs P₂O₅/acre). Commercial P fertilizer should not be applied if soil test P is unknown.
| Crop | Low Soil Test P 0-50 lbs P/acre | Medium Soil Test P 50-100 lbs P/acre | High Soil Test P >100 lbs P/acre |
|---|---|---|---|
| Corn | 80 | 50 | 0 |
| Cotton | 60 | 30 | 0 |
| Grain Sorghum | 60 | 40 | 0 |
| Rice | 40 | 0 | 0 |
| Soybeans | 40 | 0 | 0 |
| Wheat | 60 | 30 | 0 |
for Application of Commercial Fertilizers
Table 3- Protective Rate of Commercial Phosphate Fertilizer for Fruits and Vegetables (in lbs P2O5/acre). Commercial P fertilizer should not be applied if soil test P is unknown.
| Crop | Low Soil Test P 0-50 lbs P/acre | Medium Soil Test P 50-100 lbs P/acre | High Soil Test P >100 lbs P/acre |
|---|---|---|---|
| Sweet Corn | 80 | 40 | 0 |
| Irish Potatoes | 80 | 40 | 0 |
| Tomatoes | 80 | 60 | 0 |
| Okra, Eggplant, Peppers, Cabbage, Broccoli, and Cauliflower | 80 | 60 | 0 |
| Sweet Potatoes | 80 | 80 | 0 |
| Watermelon, Cantaloupe, Squash, and Pumpkins | 60 | 50 | 0 |
| Cucumbers | 80 | 70 | 0 |
| Spinach, Collards, Mustard Greens, Kale, and Turnip Greens | 60 | 60 | 0 |
| Snapbeans | 90 | 45 | 0 |
| Pole Beans, Lima Beans, Dry Beans, and English Peas | 80 | 40 | 0 |
for Application of Commercial Fertilizers
Table 3- (Continued) Protective Rate of Commercial Phosphate Fertilizer for Fruits and Vegetables (in lbs P2O5/acre). Commercial P fertilizer should not be applied if soil test P is unknown.
| Southern or Summer Peas | 80 | 40 | 0 |
|---|---|---|---|
| Grapes | 80 | 30 | 0 |
| Strawberries | 90 | 90 | 0 |
| Blackberries and Raspberries | 60 | 30 | 0 |
| Blueberries | 60 | 0 | 0 |
Table 4- Protective Rate of Commercial Phosphate Fertilizer for Trees and Ornamentals (in lbs P2O5/acre). Commercial P fertilizer should not be applied if soil test P is unknown.
| Crop | Low Soil Test P 0-50 lbs P/acre | Medium Soil Test P 50-100 lbs P/acre | High Soil Test P >100 lbs P/acre |
|---|---|---|---|
| Fruit Trees - Pears, Cherries, Apples, Peaches, Plums and Figs | 0.3 lbs P2O5/tree | 0 | 0 |
| Pecans and Walnuts | 80 | 40 | 0 |
| Pine Nursery Seedlings | 60 | 30 | 0 |
| Christmas Trees | 50 | 0 | 0 |
| Ornamentals | 50 | 50 | 0 |
for Application of Commercial Fertilizers
Table 5- Protective rate for commercial P fertilizer for grasses and legumes. Values are in lbs product/acre.
| Fertilizer Type | Low soil test P (0-50 lbs/acre) | Med. Soil test P (50-100 lbs/acre) | High soil test P (>100lbs/acre) | Soil test P not known |
|---|---|---|---|---|
| 0-46-0 | 175 | 88 | 0 | 0 |
| 13-13-13 | 600 | 300 | 0 | 0 |
| 10-20-10 | 400 | 200 | 0 | 0 |
| Miracle Grow (20-27-5) | 300 | 150 | 0 | 0 |
| Scott’s weed And Feed (28-3-3) | Base rate on nitrogen needs | Base rate on nitrogen needs | 0 | 0 |
for Application of Commercial Fertilizers
Table 6– Protective rate for commercial N fertilizer. Values in lbs/acre.
| Forage type | Low soil test P (0-50 lbs/acre) | Med. Soil test P (50-100 lbs/acre) | High soil test P (>100 lbs/acre) | Additional applications |
|---|---|---|---|---|
| Warm season grasses | 80 | 80 | 80 | Add 50-60 lbs N/acre as needed |
| Cool season grasses | 45 | 45 | 50 | Add 50-60 lbs N/acre as needed |
| Improved warm season pastures | 45 | 45 | 50 | Add 50-60 lbs N/acre as needed |
| Alfalfa | 0 | 0 | 0 | |
| Warm season grass/clover | 0 | 0 | 0 | Add 80 lbs N/acre when clover is dormant |
| Cool season grass/clover | 60 | 60 | 60 | |
| Cool season grass on warm season grass | 60 | 60 | 60 | Add 60-80 lbs N/acre as needed |
| Warm season Perennial legume | 0 | 0 | 0 |
for Application of Commercial Fertilizers
Table 7– Protective rate for commercial N fertilizer. Values in lbs/acre.
| Forage type | N Rate | Additional application |
|---|---|---|
| Warm season grasses | 80 | Add 50-60 lbs N/acre as needed |
| Cool season grasses | 45 | Add 50-60 lbs N/acre as needed |
| Improved warm season pastures | 45 | |
| Alfalfa | 0 | |
| Warm season grass/clover | 0 | Add 80 lbs N/acre when clover is dormant |
| Cool season grass/clover | 60 | |
| Cool season grass on warm season grass | 60 | Add 60-80 lbs N/acre as needed |
| Warm season perennial legume | 0 |
for Application of Commercial Fertilizers
Table 8- Protective Rate of Commercial Nitrogen Fertilizer for Row Crops (in lbs N/acre).
| Crop | lbs N/acre | Comments |
|---|---|---|
| Corn | 120 | Based on yield of 125 bushels/acre; increase N rate by 30 lbs/acre for each 25 bushel increase in yield |
| Cotton | 100 | Reduce N rate if soil nitrate levels are high based on University of Arkansas recommendations |
| Grain Sorghum | 100 | Increase rate by 30 lbs/acre when yields are greater than 6,000 lbs/acre or when irrigated |
| Rice | 75-150 | Adjust N rates according to variety grown and crop rotation as recommended by University of Arkansas. |
| Soybeans | 0 | |
| Wheat | 90 |
for Application of Commercial Fertilizers
Table 9- Protective Rate of Commercial Nitrogen Fertilizer for Fruits and Vegetables (in lbs N/acre).
| Crop | lbs N/acre | Comments |
|---|---|---|
| Sweet Corn | 50 | Sidedress 50 lbs N/acre when plants are 12' |
| Irish Potatoes | 50 | Sidedress 40 lbs N/acre when plants are 6' |
| Tomatoes | 40 | Sidedress 30 lbs N/acre when fruit set begins |
| Okra, Eggplant, Peppers, Cabbage, Broccoli, and Cauliflower | 40 | Sidedress 30 lbs N/acre when appropriate |
| Sweet Potatoes | 40 | |
| Watermelon, Cantaloupe, Squash, and Pumpkins | 30 | Sidedress 30 lbs N/acre at flowering |
| Cucumbers | 40 | Sidedress 40 lbs N/acre when vines start to run |
| Spinach, Collards, Mustard Greens, Kale, and Turnip Greens | 30 | Sidedress 30 lbs N/acre after stand is assured |
| Snapbeans | 30 |
for Application of Commercial Fertilizers
Table 9- (Continued) Protective Rate of Commercial Nitrogen Fertilizer for Fruits and Vegetables (in lbs N/acre).
| Pole Beans, Lima Beans, Dry Beans, and English Peas | 20 | |
|---|---|---|
| Southern or Summer Peas | 20 | |
| Grapes | 30 | Sidedress additional 30 lbs N/acre each month during the growing season, as needed |
| Strawberries | 90 | |
| Blackberries and Raspberries | 30 | Sidedress 30 lbs N/acre following harvest |
| Blueberries | 60 | Apply additional 30-60 lbs N/acre/year when plants are 3 to 4 years old, as needed |
for Application of Commercial Fertilizers
Table 10- Protective Rate of Commercial Nitrogen Fertilizer for Trees and Ornamentals (in lbs N/acre).
| Crop | lbs N/acre |
|---|---|
| Fruit Trees - Pears, Cherries, Apples, Peaches, Plums and Figs | 0.3 lbs N/tree |
| Pecans and Walnuts | 40 |
| Pine Nursery Seedlings | 30 |
| Christmas Trees | 20 |
| Ornamentals | 25 |