65 



Disftincc hcfirceri cdric rows (pp. "208-215) . — P^xperinients Avere 

 madi' ill Imnn with row^ from 3 to 8 feet apart, "seeded " with plant 

 cane and stiil)l)le. and trcatecl with coiiiiiicrcial fertilizers. The 

 amounts of cane |)er acre recjuired f(»r plantini>' at the difl'erent 

 distances, yield of cane, composition, and availal)le sugar j)er aciH' are 

 liiven. The residts were fa\'oral»le to a distance hetweeii the roAVs 

 nuicli less than the common distance of 7 feet. P2.\i)eriinenls in this 

 line will he continued. 



\'(irieties of cane (p, 21."J). — More than seventy varieties of cane 

 from all parts of the Avorld have been received throuoh the United 

 States Departments of State and Aoricultnre. A report on forty- 

 ei*>'ht of these \'arielies a'rown at the Station will l)e issued in a 

 separate bulletin. 



Effectn of fertilizei'H on siKjut'-cdiie (pj). •215-252). — "One of the 

 chief aims of this Station is to find a fertilizer that will produce a 

 niaximuni tonnaiiv with a maxininm sugar content upon the soils of 

 Louisiana.'" To this end experiments, classified as scientific and 

 ])opuh>r, were made on 7 plats. On the Z "' scientific plats " the 

 exiK'riinents were (1) with nitrogen, (2) with phosphoric acid, and 

 (;>) with i)otash. The objects were to test (1) the requirements of 

 the soil used for each ingredient, (2) the forms of fertilizers best 

 adapted to cane, and (J^) the quantity most profitable for cane. Pot- 

 ash, phosphoric acid and nitrogen were applied in different amounts 

 and forms of combination, each Avith an excess of the other ingre- 

 dients, in order to make a fair test of the requirements of the soil 

 for the ingredient in question and the specific effect of the latter 

 \\\w\\ the cane. In the " special nitrogen experiments." for instance, 

 a basal mixture containing phosphoric acid and potash is used, and 

 to this nitrogen is added in different amounts and dillerent forms of 

 combination. The mixtures containing the difi'erent quantities of 

 each form of nitrogen taken together are called a grou]). 'lliere 

 are thus in each special nitrogen experiment as many groups as there 

 are forms of nitrogen tested. The advantages of the duplication of 

 tests Avith each ingredient are well brought out l)y the details of the 

 re])ort. which are given in tables witli summaries in the text. They 

 include total yield, comi^osition as shown ijy analysis, and amounts 

 of available sugar.* 



Potuissu; fertilizers — Special pofaxh experiment^'. (])p. 21(5-221). — 

 In this experiment the object was to test fir.-t and primarily the 

 re([uirements of the soil used for potash, and secondly the form and 



* Tlie .liciier.il ]il;in of these exiieriiiu'iits (■(ii-resiioiuls with those made l)y a 

 nniuher of (Wiieri mentors and described in paj^cs ".M-^S of ("ircular No. 7 of the 

 Ollice of E.xperiinent Stations, on "Co-operative Experiments with Fertilizers," 

 and in more detail in bulletins published by the U. S. Dei)artnient of Agricul- 

 ture in ISS'J and ISS^i as " (Y)-oi)erative Experimenting as a Means of Showing 

 the Effects of Fertilizers and the Feeding Capacities of Plants," and as " Ifesults 

 of Field Experiments with Fertilizers," by W. O. Atwater. 



4000— No. 2 M 2 



