tennessee brown softrock phosphate 50lb
it is not a colloidal nor a hard rock but rather a unique reactive rock source of natural phosphate with nop certification for organic use. lab tests show an average content of 23% p2o5. compared to other phosphate sources test show it to contain the least amount of heavy metal contaminants.
rock phosphate - 100% organic fertilizer (50lb) planet
an organic untreated soft rock phosphate (0-3-0) with colloidal clay containing valuable trace minerals in addition to phosphorus. since phosphorus is lacking in most soils fertilizer applications are a must for superior results. calphos? contains a minimum of 3% available (and a minimum of 20%
rock phosphate for sale wholesale & suppliers - alibaba
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calphos soft rock phosphate - regular powder (50 lb)
not the same as the hard rock phosphate sold by most nurseries and farm suppliers which is not nutritionally as readily available. averages 20% p2o5 (3% immediately available) 20% ca; soft rock phosphate should be applied and worked in prior to planting; use at 5 lb/100 sq.ft. or 1 ton/acre on phosphate deficient soils less on fertile soils
11.21 phosphate rock processing - us epa
the standard industrial classification (sic) code for phosphate rock processing is 1475. the 6-digit source classification code (scc) for phosphate rock processing is 3-05-019. because the primary use of phosphate rock is in the manufacture of phosphatic fertilizer only
soft rock phosphate - fertilizer brokerage
soft rock phosphate is an important phosphate source that is actually a byproduct from the old time hard rock mining. in order to increase the purity of the higher analysis of the hard rock the soft rock was a clay impurity which was washed and then it was sent in this water through to a settling pond.
phosphate rock - an overview sciencedirect topics
phosphate rocks: phosphorus an element of phosphate strengthens roots and helps them to mature early. table 7.6 shows the rock phosphate analysis which contains 26.7% p 2 o 5.rock phosphate is recommended in organic farming as a source of phosphorus for plants.
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