1058 EXPERIMENT STATION RECOED. 



The wide variation in the effect of green manures plovred under at different 

 times, Causemann {Deut. Landw. Presfie, 30 {1903), No. 31, pp. 263, 364).— The yield 

 of the following crop of rye on light sandy soil was in every case larger when lupines 

 were turned under September 28 than when turned under July 31. 



Phosphorus versus lime in plant ash, P. Q. Keegan {Nature [^London], 66 

 {1902), No. 1722, p. 655). — Analyses of the ash of the leaves of a number of plants 

 are reported in support of the view that a certain proportion of lime in the soil (say 

 3 or 4 per cent) interferes with the assimilation of phosphorus and is so inimical 

 to the life of certain so-called calcifugous plants which require a definite amount of 

 phosphorus for the healthy performance of their physiological functions. 



An unusual result of fertilizing on a sandy moor soil, Clausen {Jour. Landir., 

 51 {1903), No. 1, pp. 77-80, fig. 1). — Pot experiments are reported in which the yield 

 of grain of oats was much larger and of straw smaller in case of fertilizer containing 

 no phosphoric acid than in one containing that element. The experiments are to be 

 repeated. 



Results of experiments with potash fertilizers on moor meadows, Bach- 

 MANN {Fuhlinffs Landw. Zlg., 52 {1903) , No. 7, pp. 251, 252).— A comparison of kainit 

 and 40 per cent potash salt in which the results favored the latter, both as fall appli- 

 cation and as spring application. Applications of lime were apparently more bene- 

 ficial in case of the kainit than in case of the other salt. 



On potash and on alkaline phosphatic nitrogenous bone fertilizer, 

 J. B. SoBRiNHo {Bol. Agr. Sao Paulo, 3. ser., 1902, No. 12, pjp. .^W-^Off).— This article 

 discusses the sources of jjotash and describes the method devised by Ilienkoff and 

 Engelhardtof the agricultural-chemical institute of St. Petersburg for preparing bone 

 fertilizer ])y treatment with caustic potash. 



The manufacture of animal fertilizers {U Engrais, 18 {1903), No. 15, pp. 

 353-355). — The preiiaration of fertilizers from by-products of tallow refining, from 

 poudrette, dried meat and blood, and ground bone is discussed. 



Commercial fertilizers, H. A. Huston and W. J. Joxes, Jr. {Purdue Univ. Spec. 

 Bid., Mar., 1903, j)p- 40). — "This bulletin contains the detailed report and summary 

 of fertilizer inspections made in 1902, the full text of the Indiana fertilizer law, a list 

 of manufacturers who have registered raw materials (nitrogen and potash com- 

 pounds), and a list of all fertilizers registered that were on sale April 1, 1903." 

 Analyses of 679 samples are reported. 



Analyses of commercial fertilizers, AV. C. Stubbs {Louisiana Stas. Bui. 73, 2. 

 ser., ]ip. 1-173, 177-189). — This 1)ulletin gives the text of the State fertilizer law; 

 statistics of the fertilizer trade in Louisiana; brief notes on the sources of fertilizing 

 materials, the purchase and valuation of fertilizers; and tabulated analyses of several 

 thousand samples of fertilizing materials, including mixed fertilizers, acid phosphates, 

 cotton-seed meal, bone, tankage, dried blood, nitrate of soda, sulphate of ammonia, 

 muriate of potash, sulphate of potash, kainit, bat guano, slag, floats, and boneblack. 



Inspection of fertilizers in 1902 and analyses of wood ashes and miscel- 

 laneous fertilizing materials, F. W. ]\1(>kse et al. {New Hampshire Sta. Bui. 97, 

 pp. 12). — Analyses of 81 brands of fertilizers inspected in cooperation with the State 

 board of agriculture and 9 samples of ashes, 2 of superphosphate, 1 each of South 

 Carolina floats, ground bone, tankage, cotton waste, nitrate of soda, and sulphate of 

 potash, 2 of insecticides, and 5 of muck, are re])orted. The text of the fertilizer law 

 which went into effect in 1901 is given. 



Some facts about commercial fertilizers in New York State, L. L. Van Slyke 

 {Neiv York State Sta. Bui. 230, jyp. 18).— This bulletin discusses the importance of tlie 

 fertilizer trade in the State and points out "how better economy may be realized in 

 purchasing plant foods." The recommendations include (1) the purchase of high- 

 grade fertilizers, and (2) the purchase of unmixed materials. The more economical 



