Foliar feeding, a term referring to application of essential plant nutrients to above ground plant parts, has been documented as early as 1844. Foliar applications have proven to be an excellent method of supplying plant requirements for secondary nutrients and micro-nutrients, while supplementing N-P-K needs for short and/or critical growth stage periods.
Not all fertilizers are suitable for use as a foliar spray. The primary objective of a foliar application is to allow for maximum absorption of nutrients into the plant tissue; therefore, foliar fertilizer formulations should meet certain requirements in order to minimize foliage damage.
1. Low Salt Index: Damage to plant cells from high salt
concentrations can be considerable, especially from
nitrates and chlorides.
2. High Solubility: Needed to reduce the volume of solution
needed for application.
3. High Purity: Needed to eliminate interference with spraying,
solution compatibility, or unexpected adverse effects on
N-RICH FOLIAR FERTILIZERS
N-Rich fertilizers meet and exceed all standards when it comes to foliar fertilizers. N-Rich's 20-14-12-6 has a salt index of 10, compared to other products that have salt indexes of 40 - 60. N-Rich fertilizers are very high in solubility and purity, thus making them safe to use and safe to handle.
Another benefit from using N-Rich Plant Food is its pH. The leaf surface of all field crops is acidic and the nutrients applied in a pH solution of 4.0 to 4.5 have the opportunity of moving directly into the leaf and being immediately available. Another advantage to using N-Rich fertilizers is its form. Foliar nutrients come in both a liquid and soluble powder form. Liquids do not contain as many nutrients as they rapidly become super saturated and crystallization can occur. Soluble powders on the other hand, can contain much higher amounts of the same nutrients and can act as safeners in application.
Timing: ALFALFA - Applications should be made as soon as there is enough leaf area to absorb nutrients. After each cutting - just as new growth appears.
CORN - First application should be made at the 3 - 4 leaf stage. An optional second application should be made at early silk.
SOYBEANS - Early applications can be made at V4 - V5. Second applications should be made during the flowering stage of growth(R3 - R5).
SUGAR BEETS - Foliar feed at the 6-8 leaf stage then every two weeks with N-Rich 20-14-12 or 25-15-15 up to cut off time.
SUNFLOWERS - Foliar feed with 10 - 12 lbs. N-Rich 20-14-12 when plants are 6 - 8 inches tall.
WHEAT - Early applications should be made in the spring when the plants are 3 - 8 inches tall. Later applications can be made at Feek's 10(early bloom).
SMALL GRAINS - Early applications should be made when plants are 3 - 6 inches tall. Later applications should be made when the plant is heading out.
Temperature: 65-85° F
Humidity: greater then 55%
Wind Speed: less than 15 mph