Fertilizer101 Resources Ferti Quote
"Civilization as it is known today could not have evolved, nor can it survive, without an adequate food supply."
-- Norman Borlaug

Phosphorus

Phosphorus (P) is another key member of the “big three” primary nutrients. Phosphorus is involved in many processes critical to plant development. Key among them is photosynthesis, where plants convert sunlight to energy. Phosphorus is also important to respiration, cell enlargement, cell division, energy storage, and energy transfer. This makes it a principal to the quality of the plant and the fruit it produces. P also moves easily from older plant tissue to new plant tissue. This is one way farmers can tell if their crops are deficient in phosphorus; they can look at the bottom (older) parts of the plant for signs of poor health.

Product Safety First

One question that inevitably arises with regard to any product, beyond the question of whether or not the product is usable for the purpose for which it was sold, is “Is it safe?”

There’s no question that fertilizer is suitable for the purpose for which it is sold. Typical estimates of the portion of total crop yield directly attributable to fertilizer run from more than 40 to 60 percent. But, just as any other product does, fertilizer faces the safety question. Fortunately, the fertilizer industry, U.S. industry trade association The Fertilizer Institute (TFI), and TFI’s European counterpart the European Fertilizer Manufacturers Association are not asking you to take their word for the answer to the first question. The industry has undertaken an extensive product safety testing program during the last decade, addressing not only the general product and handling safety of fertilizer materials.

Although phosphorus is common in the soil, most of it is inherently unavailable to plants. Only about four pounds of phosphorus per acre is an available form in most soil types. Farmers have to make up the rest of a crop’s phosphorus needs with fertilizer. Studies by crop fertility experts indicate that phosphorus deficiency may be more responsible for below-optimum crop yields around the world than other nutrient deficiencies or plant health problems.

As plants mature, phosphorus moves into the seed and fruit, helping the cells divide and grow in a regular and healthy manner. Cell enlargement and division directly affect crop size and weight (yield) and crop quality in the form of its shape and appearance, especially in the fresh produce market for fruits, vegetables, and ornamental plants.

As with nitrogen, phosphorus is lost from the soil through plant harvest and can be lost by surface water erosion. Unlike nitrogen, however, phosphorus moves very little in the soil. This makes placement of P absolutely critical. Research has shown that plant roots come into contact with only about three percent of the soil particles in the volume of soil in which the plant grows. The roots may never contact soil particles as little as an inch away from the seed or root.

Nitrogen Use, Loss and Removal Phosphorus and Fertilizer Products

Comments:

Submitted by: lora chan
October 20, 2011
I'm urgent want to purchasing potassic fertilizerfrom china.pls sent the price sheet to me.
Submitted by: BASAVARAJ
July 29, 2012
GOOD PACKAGE OF PRACTICE

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