Show farm fertility every bushel of grain each on of bay every animal and animal product removed from tha eoll lessens the cupply ol 01 elements required tor fu lure crops it by the application ot lime purchased manure the use ol 01 fertilizers and ther growing of green manure crops fertility may be main talked it becomes a question ot economics whether the cost of seed and the labor required to grow ferell izing crops are profitable or not in ordinary agriculture and in localities where the demand for perishable fruit etc does not exist it may be doubtful whether the expense Is justifiable |