136 EXPERIMENT STATION EECORD. 



Cotton experiments, 1913, R. J. Ricks, E. B. Ferris, C. T. Ames, and G. B. 

 Walker (Mississippi Sta. Bui. 164 (19W, PP- 3-21).— In this bulletin are found 

 tables giving temperature and rainfall data for 1913, the results of fertilizer 

 tests and planting distance experiments at tbe central station, variety and 

 fertilizer tests at the McNeill and Holly Springs substations, and variety tests 

 at the Delta substation. 



It is noted that no profitable results have been secured at the central station 

 from the use of potash, which has for the most part been applied in the form 

 of kainit, other than on soils where cotton rusts badly. During 1913 there was 

 rust in practically all of the experimental plats excepts those to which had 

 been applied barnyard manure and kainit. The increased yields from the 

 use of nitrogenous and phosphatic materials have also been small. However, 

 the reverse of this is true on the brown loam and piney woods soils of the 

 State, since these fertilizers give profitable returns when used there. In all 

 of the plats where acid phosphate was used it has been noted that the cotton 

 opened up much earlier in the fall. 



The results at the Holly Springs substation showed that "the use of both 

 nitrogen and phosphorus, either alone or in combination, has given very satis- 

 factory results. Phosphorus hastens maturity, and valley land that is slow 

 in maturing a crop can be very greatly benefited by its use. The use of potash, 

 either alone or in combination with other elements, appears to be unnecessary 

 in these soils. 



" On thin uplands, the use of an equal mixture of acid phosphate and cotton- 

 seed meal, at the rate of 200 to 800 lbs. per acre, gives very satisfactory 

 results, and has done so for the past 8 years. Two hundred lbs. of this mixture 

 has increased the yield of seed cotton in many instances over 500 lbs. per year. 

 On the more fertile soils the quantity of phosphorus may be increased to 

 advantage. After leguminous crops, acid phosphate alone, 200 to 300 lbs. per 

 acre, can be used to profit. 



"Where leguminous crops are to be grown (no legume will make satisfactory 

 growth on the thin uplands of this section without the use of about 2 tons 

 of crushed or ground limestone per acre), the use of 800 to 400 lbs. of rock 

 floats under the legume will give good results. Where the rock floats is mixed 

 with manure, or with compost, the phosphorus is made available for plant use." 



Recent trials with cotton in Grenada, G. Atjchinleck ( West Indian Bui., IS 

 {1913), No. Jf, pp. 35S-366).—A. brief note is given on some cultural trials and 

 on a bacterial disease that results fatally to cotton. 



Cotton production in the German colonies, K. Supf {TerJtandl. Baumivollbau 

 Kom., Eolon. Wii-fschaft. Kom., No. 1 {1913), pp. 3-32, pis. 5).— This discusses 

 the possibility of growing cotton in German East Africa and notes an attempt 

 by the natives to cultivate it. 



Cultivation of kapok to replace that of caoutchouc, O. Cantzler ( Verhandl. 

 BaummoUhau Kom., Kolnn. Wirtschaft. Kom., No. 1 {1913), pp. 52-68).— This 

 article discusses the possibilities of kapok as a crop in the German Colonies to 

 take the place of caoutchouc, the price of which is reported to be continually 

 decreasing. 



Germination of oats, C. Brioux (Vie A(jr. ct Rurale, 2 {1913), No. 47, pp. 

 531-533). — This discusses the results of experiments on the germinative ability 

 of oat seeds when aerated and when partially dried. 



Effect of certain artificial manures on the bushel weight of oats {Dcpt. 

 Agr. and Tech. Instr. Ireland Jour., 13 (1913), No. J,, pp. 705-707).— The results 

 give averages of experiments conducted at several centers in Ireland, presented 

 in tabular form, with the following conclusions : 



