Phos-Gro Range
Phos-Gro is Phosphorous-rich CCF fertiliser imported solely by Greenfield fertilisers for the NI/ROI markets.
Phos-Gro Contains specific Macro and Micro Nutrients that enhance the efficiency of the fertiliser when compared to other phosphate sources such as TSP.
Every granule in Phos-Gro contains 3 different chemical forms of Phosphate, for maximum utilisation, plus Sulphur, Calcium and Zinc.
Monocalcium Phosphate for fast root absorption.
Dicalcium Phosphate for medium term benefit.
Tricalcium Phosphate to ensure phosphorus availability as the crop continues to grow.
Benefits
Higher availability of Phosphorous over the growing cycle of the crop
Maximum synergy between P, Zn & S
Root growth stimulation and increase in floral fertility
Application
Phos-Gro is available as a straight or by our special range of seedbed fertilisers for autumn and spring application for precision application or spreading.
| Phos-Gro Range - NI Analysis | ||||||
| N | P | K | SO3 | Zn | Ca | |
|---|---|---|---|---|---|---|
| Phos-Gro 6-30 | 0 | 14.4 | 36 | +SO3 | +Zn | +Ca |
| Phos-Gro 9-20 | 0 | 21.6 | 24 | +SO3 | +Zn | +Ca |
| Phos-Gro 3-7-30 | 3 | 16 | 36 | +SO3 | +Zn | +Ca |
| Phos-Gro 5-5-25 | 5 | 12 | 30 | +SO3 | +Zn | +Ca |
| Phos-Gro Range - ROI Analysis | ||||||
| N | P | K | S | Zn | Ca | |
|---|---|---|---|---|---|---|
| Phos-Gro 6-30 | 0 | 6 | 30 | +S | +Zn | +Ca |
| Phos-Gro 9-20 | 0 | 9 | 20 | +S | +Zn | +Ca |
| Phos-Gro 3-7-30 | 3 | 7 | 30 | +S | +Zn | +Ca |
| Phos-Gro 5-5-25 | 5 | 5 | 25 | +S | +Zn | +Ca |
Sulphur
Sulphur is essential in the structural and enzymatic components in plants.
It is also a key component of some essential amino acids and is needed for protein synthesis. Chlorophyll synthesis also requires S. Sulphur is not readily translocated within plants, so all plants need a continuous supply of sulphur from emergence to crop maturity.
A sulphur deficiency at any growth stage can result in reduced crop growth and yield.
Calcium
Plays a very important role in plant growth and nutrition, as well as in cell wall deposition.
The primary roles of calcium: As a soil amendment, calcium helps to maintain chemical balance in the soil, reduces soil salinity, and improves water penetration.
Calcium is a secondary nutrient that is critical to crop development. It is needed in large amounts by all plants for the formation of cell walls and cell membranes, and it plays a vital role in soil structure. Due to the immobility of calcium in the soil and plant tissues, a continuous supply must be present for plants to access.
Zinc
An indispensable trace element for all plants. It is very important in the early stages of growth. Zinc influences the production of auxins. These are natural growth hormones, essential for youth growth. Some herbicides put the plant roots on non-active. Especially those of the sulfonylurea family. The roots do not absorb the zinc anymore. A zinc application will help with the following
reduce the stress of weed control
prevent the plant from growing less or stop growing
reduce the amount of herbicide without sacrificing the effect
or increase the effect of the herbicides with equal dosage
ensure continuous zinc absorption and guarantee the good quality of your crop.
(Source: BLGG AgroXpertus - The Netherlands)
Phosphorus
Phosphorus is one of the main three nutrients most commonly found in fertilisers and is the “P” in the NPK balance that is listed on fertilisers. The function of phosphorus in plants is very important. It helps a plant convert other nutrients into usable building blocks with which to grow.
As an essential nutrient, it forms several key plant structure compounds and is a catalysis in the conversion of numerous key biochemical reactions in plants.
Phosphorus is noted especially for its role in capturing and converting the sun's energy into useful plant compounds.
Phosphorus Deficiency
Phosphorus Deficiency
Phosphorus deficiency is more difficult to diagnose than a deficiency of nitrogen or potassium. Crops usually display no obvious symptoms of phosphorus deficiency other than a general stunting of the plant during early growth. By the time a visual deficiency is recognized, it may be too late to correct in annual crops.
Some crops tend to show an abnormal discolouration when phosphorus is deficient. The plants are usually dark bluish-green in colour with leaves and stem becoming purplish. Phosphorus is highly mobile in plants, and when deficient, it may be translocated from old plant tissue to young, actively growing areas.
Consequently, early vegetative responses to phosphorus are often observed. As a plant matures, phosphorus is translocated into the fruiting areas of the plant, where high-energy requirements are needed for the formation of seeds and fruit.
Phosphorus deficiencies late in the growing season affect both seed development and normal crop maturity.
The percentage of the total amount of each nutrient taken up is higher for phosphorus late in the growing season than for either nitrogen or potassium.
Availability of Phosphorus
Availability of Phosphorus
Soil pH
Precipitation of phosphorus as slightly soluble calcium phosphates occurs in calcareous soils with pH values around 8.0. Under acid conditions, phosphorus is precipitated as Fe or Al phosphates of low solubility.
Maximum availability of phosphorus generally occurs in a pH range of 6.0 to 7.0.
This is one of the beneficial effects of liming acid soils. The fertiliser efficiency of Phosphate can reduce to 52% at a pH of 6.0
Balanced Crop Nutrition
Adequate supplies of other plant nutrients tend to increase the absorption of phosphorus from the soil. Application of ammonium forms of nitrogen with phosphorus increases phosphorus uptake from a fertiliser as compared to applying the phosphorus fertiliser alone or applying the nitrogen and phosphorus fertilisers separately.
Applications of sulphur often increase the availability of soil phosphorus on neutral or basic soils, where the soil phosphorus is present as calcium phosphates.
Application Timing
Fixation of soil phosphorus increases with time of contact between soluble phosphorus and soil particles.
Consequently, more efficient utilization of fertiliser phosphorus is generally obtained by applying the fertiliser shortly before planting the crop.
This practice is especially effective on soils with high phosphorus-fixing capacities.
Soil Conditions and Compaction
Phosphorus absorption by the plant is decreased by low soil temperature and poor soil aeration. Starter fertilisers containing water-soluble phosphorus are much more likely to increase crop growth during cool weather.
Excessive soil moisture or soil compaction reduces the soil oxygen supply and decreases the ability of the plant roots to absorb soil phosphorus. Compaction reduces aeration and pore space in the root zone. This reduces phosphorus uptake and plant growth. Compaction also decreases the soil volume that plant roots penetrate, limiting their total access to soil phosphorus.
Placement
If a grower is looking for maximum return from high phosphorus investment on low-testing soils, band application, if possible, is best.
Otherwise broadcast application prior to drilling is the next best option.
This ensures an early, accessible phosphorus supply for developing seedlings and a nutrient reserve later in the growing season, when phosphorus demands remain strong.
Phosphorus Application at or before Drilling
High rates can be applied without injuring the plant
Nutrient distribution throughout the root zone encourages deeper rooting, while band placement causes root concentration around the band
Deeper rooting permits more root-soil contact, providing a larger reservoir of moisture and nutrients
Helps ensure full-feed fertility to help the crop take full advantage of favourable growth conditions throughout the growing season