Annual report of the Board of Control of the New York Agricultural Experiment Station . percentage ofprofit on the cost of fertilizer, while that of 725 gave the greatest netprofit of any treatment. Plat 731 receiving 10 tons barnyard manureper acre once in 3 years is not considered in the comparison of profits. Table V. Average of Three Years Results in Fertilizing TimothyMeadows (1905-07). PlatNo. Pounds of fertilizers usedper acre annually. Cost offertilizersper acreannually. Increaseof hayper acreannually. Value ofannual increaseat $10 per ton. Netgainperacre. 712713715 716718719 725731 32
Annual report of the Board of Control of the New York Agricultural Experiment Station . percentage ofprofit on the cost of fertilizer, while that of 725 gave the greatest netprofit of any treatment. Plat 731 receiving 10 tons barnyard manureper acre once in 3 years is not considered in the comparison of profits. Table V. Average of Three Years Results in Fertilizing TimothyMeadows (1905-07). PlatNo. Pounds of fertilizers usedper acre annually. Cost offertilizersper acreannually. Increaseof hayper acreannually. Value ofannual increaseat $10 per ton. Netgainperacre. 712713715 716718719 725731 320 acid phosphate 80 muriate of potassium 160 nitrate of soda 320 acid phosphate 160 nitrate of soda 320 acid phosphate 80 muriate of potassium 160 nitrate of soda 80 muriate of potassium 320 nitrate of soda 320 acid phosphate 80 muriate of potassium 10 tons of manure once in threeyears $2 241 844 48 6 72 4 086 32 13 04 1,211 1,6141,0792,111 4,1922,975 $3 41 4 946 05 8 07 5 3910 55 20 9614 87 $1 17 3 101 57 1 351 31 4 23 7 92 52 Report of the Department of Agronomy of the. 11 \ bushels per acre. 351 bushels per acre. Influence of Limestone and Natural Rock Phosphate on Soil Productivity. This grain was grown in southern Illinois, on land practically abandoned ten yearsbefore, and then purchased by present owner for $15 per acre. During the past ten yearsthe land has received only one application of manure, of 8 or 10 tons per acre, and limestoneand natural rock phosphate averaging $ worth per acre per year. (At present New YorkState prices for these materials the cost would be about $ per acre.) The soil on thisfarm is as light-colored and as deficient in organic matter as the hill-land soils of southernNew York. It is altogether probable that similar treatment with limestone and phosphoruswould give as satisfactory results on New York soils. (See Circular 168, Illinois Agricultural Experiment Station, Urbana, 111.) New Yoek Agbicultubal Expeeiment Station. 53
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