628 EXPERIMENT STATION RECORD. 



benefit to cotton on Texas soils than to corn. The effect of Thomas phosphate 

 on corn was less than that of acid phosphate in the 4 tests and greater on 

 cotton in the 2 tests. 



" In the experiment on cauliflower the best results were secured with an 

 application of 300 lbs. acid phosphate per acre, 50 lbs. sulphate of potash, 250 

 lbs. cottonseed meal, with a top dressing of nitrate of soda, equivalent to 600 

 lbs. per acre of a fertilizer containing 8 per cent phosphoric acid, 5 per cent 

 j)olash. and 3 per cent nitrogen, followed by the top-dressing with nitrate of 

 soda. 



" Potash was effective in 2 experiments on tomatoes. Nitrogen also was 

 effective in one experiment. 



" Lime was most effective in the production of peanuts at Piock Island, acid 

 phosphate and potash being also effective. Acid phosphate and Thomas phos- 

 phate were most effective in the production of hay at College Station. 



" One cooperative onion experiment and three other experiments on onions 

 are reported. Potash gave no results in any of them. Phosphoric acid was 

 most effective at Clyde; cottonseed meal was also effective. Lime was appar- 

 ently most effective in one experiment at Laredo, but this soil is very rich in 

 lime. Nitrate of soda or cottonseed meal was most effective in another experi- 

 ment at Laredo. Barnyard manure was the only addition which had much 

 effect at Beeville." 



In 13 experiments with Irish potatoes acid phosphate produced results in 10 

 cases, cottonseed meal in all, and potash in 5. A mixture of equal parts acid 

 phosphate and cottonseed meal, or of 800 lbs. acid phosphate to 1,200 lbs. cotton- 

 seed meal, makes a good potato fertilizer for many Texas soils. On some soils 

 the use of potash also would be of advantage. 



" In the 71 tests with corn, cotton, and potatoes 59 tests responded to acid 

 phosphate, 45 to cottonseed meal, and 27 to potash. This confirms our con- 

 clusions from soil analyses in previous bulletins that Texas soils are likely to 

 be deficient in phosphoric acid first of all, next in nitrogen, and last and least 

 often in potash." 



Fertilizer experiments, P. Van Hoek and A. Raxjwerda (Dept. Landb., Nijv. 

 en Handel, Verslag. en Meded. Dir. Landh. [Xetherlands], 1911, No. 1, pp. 

 1-J,4). — This article summarizes the results of a large number of fertilizer ex- 

 periments conducted in different parts of the Netherlands to test the value of 

 mineral fertilizers and stable manui'e, different nitrogenous fertilizers and the 

 effect of seasonal infiuence on their action, sodium nitrate versus ammonium 

 sulphate, potash fertilizers on clay and peat soils, phosphatic fertilizers, lime 

 as fertilizer and as a remedy for club root of cabbage, compound fertilizers, and 

 fertilizers for valley soils (dalgrondeu). 



Among the more important conclusions it is stated that mineral fertilizers in 

 general gave better results than stable manure. 



With potatoes, ammonium sulphate gave the best yields on peat soils, cal- 

 cium nitrate on sandy soils, and sodium nitrate on clay soils. Taken as an 

 average for all three soils, however, the order of efiiciency was ammonium sul- 

 phate, sodium nitrate, calcium nitrate, and calcium cyanamid. On sugar beets 

 the relative efiiciency was sodium nitrate 100, ammonium sulphate 99.5, calcium 

 nitrate 99.3, and calcium cyanamid 9S.1 ; and with grain crops sodium nitrate 

 100, calcium nitrate 9S.1, ammonium sulphate 97.5, and calcium cyanamid 95.5. 



Kainit gave better results than a so-called patent potash fertilizer. The after- 

 effects of kaijiit were very pronoimced. Slag was the most efficient phosphatic 

 fertilizer on potatoes, followed in order by superphosphate, bone meal, and 

 Algerian phosphate. Lime, when applied for several consecutive years, was 

 verv efficient in the control of chjb root of cabbage. 



