10.—(1) Without prejudice to paragraph 11 below, organic manure shall not be applied to land where the application would result in the total nitrogen in kilograms contained in organic manure applied in each year to land on the farm (including that deposited by animals whilst grazing) exceeding the specified amount calculated in accordance with paragraph (2) below.
(2) For the purpose of paragraph (1) above, the specified amount is the sum of–
(a)the number of hectares of grassland on the farm multiplied by 250kg; and
(b)the number of hectares of agricultural land other than grassland on the farm multiplied by 170kg.