Md. Code Regs. 15.20.08.07 - Nutrient Management-Phosphorus Transition Management Phase I
A. Except as
provided in §E of this regulation, if the soil sample analysis results
show a phosphorus fertility index value of 150 or greater, the Phosphorus
Management Tool, as provided in the Maryland Nutrient Management Manual,
Section II-C2, shall be used to determine the potential risk of phosphorus loss
due to site characteristics.
B. Low
Risk of Potential Phosphorus Loss.
(1) If the
risk for potential loss of phosphorus from the site is low according to the
Phosphorus Management Tool, nutrient recommendations by the consultant or
certified farm operator may use nitrogen plant needs as the limiting
factor.
(2) Nutrient applications
shall not exceed the amount of phosphorus removed by the planned crop over a
3-year period.
C. Medium
Risk of Potential Phosphorus Loss.
(1) Except
as provided in §C(2) of this regulation, if the risk for potential loss of
phosphorus from the site is medium according to the Phosphorus Management Tool,
total phosphorus applications related to crops anticipated to be planted in a
3-year period shall not exceed the amount of phosphorus removed by the planned
crops over the 3-year period, or the amount indicated by soil testing, in
accordance with the recommendations described in the Maryland Nutrient
Management Manual, Section I-B, whichever is greater.
(2) If BMPs are implemented by the operator
before or during the application of additional phosphorus that address site or
management characteristics which, according to the outcome of a recalculation
using the Phosphorus Management Tool, reduce the risk of phosphorus loss to
low, nutrient rates may be established as provided by §B of this
regulation.
D. High Risk
of Potential Phosphorus Loss.
(1) Except as
provided in §D(2) of this regulation, if the risk for potential loss of
phosphorus from the site is high according to the Phosphorus Management Tool,
phosphorus rates shall be limited to the expected amount removed from the field
by the planned crop or plant rotation immediately following the phosphorus
application, not to exceed two crops, or the amount indicated by soil testing,
in accordance with the recommendations described in the Maryland Nutrient
Management Manual, Section I-B, whichever is greater.
(2) If BMPs are implemented by the operator
before or during the application of additional phosphorus that address site or
management characteristics which, according to the outcome of a recalculation
using the Phosphorus Management Tool, reduce the risk of phosphorus loss to
medium, nutrient rates may be established as provided by §C of this
regulation.
(3) The operator shall
consider the implementation of management practices and technologies that are
effective in lowering the risk of phosphorus loss based on research and
demonstration of the University of Maryland, or other land grant university, or
by the United States Department of Agriculture, Natural Resources Conservation
Service, National Planning Procedures Handbook and practice standards adopted
for Maryland.
E. If the
soil sample analysis results indicate a phosphorus fertility index value of 500
or greater, no phosphorus may be applied.
Notes
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