FIELD CROPS. 



845 



a compilation of studies on the ash constituents, proteids, and carbo- 

 hydrates of the corn kernel, together with an account of the author's 

 investigations on the oil of corn (see p. 817). 



Clovers as green manures, F. T. Shutt {Canada Expt. Farms Rpt. 

 1897, pp. 138-146, pi. 1). — Experiments were made in green manuring 

 and in soil inoculation. A number of plats were sown to barley and 

 clover and the total clover residue, comprising the dead stems and 

 leaves and the roots to a depth of 9 in., and the amounts of fertilizing 

 constituents contained in this residue the following spring were deter- 

 mined for each plat. Mammoth red clover was sown on G plats at 

 different rates, but the plat sown at the rate of 10 lbs. per acre, although 

 not giving the largest amount of total residue, furnished the largest 

 amounts of fertilizing constituents. In the following table the data for 

 the other plats sown with this variety are omitted. The clover residue 

 was collected May 1. 



Fertilizer constituent per acre in the residue of different varieties of clover sown with barley. 



Variety. 



Mammoth red 

 Common red . 



Alsike 



Crimson 



Alfalfa 



Seed 

 per 

 acre. 



Lbs. 

 10 

 10 

 6 

 24 

 14 



Composition. 



Water. 



Per ct. 

 59.43 

 72. 50 

 71.58 

 62.82 

 61.54 



Organic 

 matter. 



Per ct. 

 33.19 

 23.61 

 22.63 

 33.01 

 34.79 



Ash. 



Per ct. 

 7.38 

 3.89 

 5.79 

 4.17 

 3.67 



Nitro- 

 gen. 



Per ct. 

 1.417 

 1.016 

 1.020 

 .827 

 1.075 



Residue 

 per 

 acre 



Lbs. 

 5, 955 

 6,125 

 3, 233 

 1, 322 

 2,212 



Fertilizing constitu- 

 ents per acre. 



Organic , , Kitro- 

 matter. Asl1 



Lbs. 

 1, 978 



1 , 446 

 732 

 478 



772 



Lbs. 



439 



238 



187 



60 



79 



Lbs. 



Inoculation experiments were made with Mtragin on horse beans and 

 mammoth red clover grown in pots. In each case plants were grown on 

 inoculated and uninoculated soil and from inoculated seed. The results 

 in each case were in favor of inoculation. Soil inoculation produced the 

 largest yields in the test with horse beans and seed inoculation in the 

 trial with clover. 



Experiments in fertilizing meadows (SelsJc. Khoz. i Lyesov., 184 

 (1897), No. 2, pp. 457-160). — Fertilizer experiments with nitrate of soda, 

 superphosphate, kainit, Thomas slag, compost, and barnyard manure 

 were made on a meadow which was divided into 26 plats of three-tenths 

 acre each. The soil was sandy, but contained a good proportion of 

 humus. From the results obtained for 2 years, it is concluded that the 

 use of nitrate of soda alone increases the yield of hay but slightly, while 

 with kainit or with superphosphate and Thomas slag its action becomes 

 more marked. The use of 040 lbs. of superphosphate gave an increase 

 of 2,81G lbs. of hay per dessiatiue (2.7 acres). Superphosphate was 

 most effective when applied in conjunction with kainit and with kainit 

 and nitrate of soda. An application of 1,720 lbs. of Thomas slag per 

 dessiatine resulted in an average increase of 2,800 lbs. of hay, while an 

 application of 9G0 lbs. increased the yield 2,460 lbs. Kainit alone 

 scarcely increased the yield, but 1,000 lbs. of kainit per dessiatine 



