1916] FIELD CROPS. 135 



Fertilizer experiments conducted witli cotton gave the highest increase over 

 the check plat, which received no manure, in the case of the plat receiving 

 nitrogen as nitrate of soda, potash in the form of sulphate, and phosphoric acid 

 as basic slag. The results of fertilizer trials over a period of 11 years are 

 regarded as showing that under the conditions existing at the experiment sta- 

 tion where the soil is loose and open, the application of commercial fertilizers 

 is not remunerative. 



Notes are given on selection work with cotton, and the results thus far se- 

 cured are regarded as encouraging although unfavorable weather conditions 

 reduced the yields. Minor experiments with peanuts, guinea corn, maize, 

 tobacco, Ilounceval peas, and species of Stizolobium are briefly noted. 



[Work with field crops on the government experiment farm at Akola, 

 Berar, for the year 1914-15], J. H. Ritchie {Dept. Agr. Cent. Prov. and Bcrar 

 [Indian Rpf. 1914-15, pp. 1-15, pi. i).— A description of the farm is given and 

 the lines of work are briefly noted. The results of experiments are presented 

 in tabular form. 



In a rotation experiment cotton followed by wheat and cotton followed by 

 tur proved the most profitable rotations under test. The wider spacing of cotton 

 plants, 15 in. each way or 15 by 20 in., proved most satisfactory, and this is con- 

 sidered due to the selection of seed that has been carried on and which has 

 influenced the branching habit of the plants. Topping cotton plants proved an 

 unproductive practice. Among the varieties, Rosea cotton as in former years 

 proved the most valuable, and selected Rosea gave better returns than the un- 

 selected strain. Poudrette was found to be the most economical manure for 

 cotton and juar grown in rotation. 



The production of green forage during the entire year, A. C. Tonnet.ier 

 (Min. Agr. Nac. [Buenos Aires], Dir. Gen. Ensehanza e Invest. Agr. [Pub.^i, 

 No. J,l (1915), pp. 125, pi. 1, figs. 32).— The value of green forage during the 

 entire year and the methods of producing it are discussed. The crops con- 

 sidered in this connection are the soy bean, cowpea, velvet bean, corn, non- 

 saccharin sorghums, millets, barley, vetches, horse bean, lupins, and Jerusalem 

 artichokes. Tables are given showing the composition of the different crops, 

 the time each occupies the land, the number of cuttings, the average quantity 

 of green forage produced, the average rainfall during the growing period, the 

 time of seeding, sprouting, and harvesting, and other popular information of 

 a similar nature. 



The number of temporary roots in the cereals, R. G. Wiggans {Jour. Amer. 

 Soc. Agron., 8 {1916), No. 1. pp. 31-37, pi. i).— This paper reports data gathered 

 with reference to the number of temporary roots in corn, wheat, einkorn, and 

 emmer. The results of the study are given in tables with brief comments. 

 The germination tests from which the data were obtained were made in the 

 laboratory at about optimum temperature and moisture conditions for seed 

 germination. The radicle is considered as the first temporary root and is in- 

 cluded in all the figures given. 



It is concluded from the results secured that the various groups of corn and of 

 wheat do not have a regular number of temporary roots. The dent corns and 

 pop corns tested had four temporary roots in a greater percentage of cases than 

 any other number. It is believed that the flint and probably the sweet corns have 

 one temporary root in more cases than any other number. The soft corns 

 varied greatly in all cases in the number of temporary roots produced. In the 

 various groups of wheat the greatest percentage produced five temporary roots 

 Instead of three as is ordinarily reported. 



