FIELD CROPS. 431 



Cooperative fertilizer experiments -with cotton in 1897, J. F. 

 Duggar (Alabama College Sta. Bui. 91, pp. 13-103). — Fertilizer experi- 

 ments were made in 30 localities of the State to determine the best 

 fertilizer for the different soils. Of the reports received 20 gave defi- 

 nite indications, and these are discussed at length and tabulated in 

 detail, while those deemed inconclusive are considered briefly. Similar 

 experiments were conducted in 189G (F. S. II., 9, p. 120). 



In all experiments cotton seed meal and acid phosphate were applied 

 at the rate of 200 and 240 lbs. per acre, respectively. Kainit was 

 applied at the rate of 100 and 200 lbs. per acre. The fertilizers were 

 applied singly, in twos, and altogether. The application of 200 lbs. 

 cottonseed meal, 210 lbs. acid phosphate, and 100 lbs. kainit per acre 

 gave the best financial results in the greatest number of localities. 



Seeding grass without grain, C. 1>. Lane (New Jersey Stas. Rpt. 

 1897, pp. 190, 191). — A grass-seed mixture of red clover, alsike clover, 

 and timothy was sown during the summer on 3 well prepared and 

 manured fields. The first field had been in grass for 4 years, the second 

 had produced oats and potatoes, while the third had yielded a crop of 

 oats. A mixture of ground bone, muriate of potash, and acid phos- 

 phate was applied to the different fields at the rate of 400, 250, and 500 

 lbs. per acre, respectively, but the land which had produced potatoes, 

 having been manured for that crop, received no fertilizer before the 

 grass seed was sown. The first field yielded 3.2 tons of cured hay the 

 following -June; the 2 other fields yielded 2.5 and 2.1 tons of hay, 

 respectively. 



Commercial fertilizers for potatoes, W". II. Jordan (New York 

 State Sta. But. 137. pp. 605-624). — The work here reported is similar to 

 previous experiments (E. S. R., 9, p. 128). Fertilizer experiments includ- 

 ing 8 acres of land and 80 plats were made with potatoes on 4 farms on 

 Long Island. Four different fertilizer formulas were applied at the 

 rate of 500, 1,000, 1,500, and 2,000 lbs. per acre. Formula No. 1 con- 

 sisted of 192 lbs. nitrate of soda, 800 lbs. high-grade dried blood, 570 

 lbs. acid phosphate, 400 lbs. muriate of potash, and 38 lbs. land plaster, 

 aggregating 2,000 lbs. and containing 0.0 per cent nitrogen, 4.75 per 

 cent available phosphoric acid, and 10.31 per cent of potash. This 

 formula was made up with reference to the composition of the potato 

 plant, excepting that the phosphoric acid was in considerable excess. 

 Formula No. 2 was similar to No. 1 with the exception that the potash 

 was supplied as the sulphate. Formula No. 3 was composed of 127 

 lbs. nitrate of soda, 440 lbs. high-grade dried blood, 1,000 lbs. acid 

 phosphate, 400 lbs. muriate of potash, and 33 lbs. land plaster, also 

 aggregating 2,000 lbs. This mixture contained 3.8 per cent of nitrogen, 

 8 per cent available phosphoric acid, and 10.1 per cent potash, and was 

 made up in imitation of a fertilizer much used on Long Island. For- 

 mula No. 4 was similar to No. 3 but the potash was supplied as sulphate. 

 In these different formulas approximately one-fourth of the nitrogen 

 was nitric and the rest organic and the phosphoric acid was as largely 

 soluble as possible. 



