Crushed apatite rock. Moderately available source of P, Ca and trace elements. 30% total phosphate (3-8 % available) and 48 % calcium (CaO) with 1/5 the neutralizing power of lime. Applications can last 5 years or longer, depending on soil conditions. Used in landscape and nursery applications to help plants adjust to transplant stress because it does not burn roots. 1-2# per plant for tree or shrub transplants, 500 to 4000# per acre depending on soil P and Ca deficiencies. Granular texture.
|NCO, 50# $23|