. Agriculture for southern schools. bs. potash to be supplied in kainit To furnish lbs. of kainit requires as many hundredweight ofkainit as 12 (the number of pounds of potash which the table shows iscontainedini cwt. of kainit) is contained times in Thus = cwt., or 246 lbs. of kainit are needed. Combining these three results: 507 lbs. cotton-seed meal 1 rnitrogen 33 ti6i lbs. acid phosphate (16%) IcontainJav. phos. acid 200 246 lbs. kainit J [potash 40 READY-MIXED FERTILIZER 105 Cost. 507 lbs. cotton-seed meal at $ per ton =1161 lbs. acid phosphate at $
. Agriculture for southern schools. bs. potash to be supplied in kainit To furnish lbs. of kainit requires as many hundredweight ofkainit as 12 (the number of pounds of potash which the table shows iscontainedini cwt. of kainit) is contained times in Thus = cwt., or 246 lbs. of kainit are needed. Combining these three results: 507 lbs. cotton-seed meal 1 rnitrogen 33 ti6i lbs. acid phosphate (16%) IcontainJav. phos. acid 200 246 lbs. kainit J [potash 40 READY-MIXED FERTILIZER 105 Cost. 507 lbs. cotton-seed meal at $ per ton =1161 lbs. acid phosphate at $ per ton = 246 lbs. kainit at $ per ton = 1914 lbs. Price asked for one ton of manufactured fertilizer Cost of home mixture affording same amounts of plant-food Saved in cash by $ A slight reduction in the amount saved must be made for the laborused. Advantage of home-mixing. — By mixing his fertilizersthe farmer can usually save several dollars per ton. He $ $ $ Fig. 66. - On left, Cotton Unfertilized ; on right, Cotton suppliedWITH A Complete Home-mixed Fertilizer can also make a variety of mixtures, adapted to each cropand to each field. io6 AGRICULTURE Fillers in fertilizers. — A full ton of the mixture is notalways needed to afford the desired amount of a full ton having the given percentage composition iswanted, add the necessary amount of some worthless mate-rial, such as ground stone or cinders. Such worthless addi-tions to fertilizers are called fillers. If manufacturers addthem it is for the purpose of making a fertilizer that theycan afford to sell at a low price. To avoid buying andhauling useless filler, use only the highest grades of manu-factured fertilizers. These are higher in price, but gener-ally furnish nitrogen, phosphoric acid, and potash at alower cost per pound than do low-grade, cheap choosing fertilizers, select that one in which a pound ofplant-food c
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