FIELD CROPS. 533 



of barley per acre, respectively. The differonce Is attributed in part to the fact 

 that the calcium cyanamid contains considerable lime and the soil is deficient 

 in this substance. On using 2 tons of lump lime and 10 cwt. of ground lime 

 per acre there were yields of 41.03 and 30.47 bu. of barley per acre respectively, 

 as comparetl with 24.06 bu. on an untreated plat. Land which was treated 

 with sulphate of ammonia and nitro lime had a thick growtli of the weetl 

 rolygonum avlcularc, of which the limed plats were almost free. Canadian 

 seed, Provence seed, and American seed produced yields of 9 tons 8J cwt., 



6 tons 13 cwt., and 6 tons 4 cwt. of green alfalfa per acre, resijectively. Seed in- 

 oculation did not produce a gain in a single instance with alfalfa, but showed a 

 slight advantage in the case of Mammoth White clover, and a marked increase 

 in yield with Dutch White clover. 



When a standard application of 12 tons of farmyard manure, .'I cwt. of sujx'r- 

 phosphate. and 1 cwt. of sulphate of potash per acre was supplemented by dif- 

 ferent mixtures, the application of 1 cwt. of sulphate of ammonia apparently 

 increased the yield of potatoes by 1 ton 12 cwt., while nitrate of soda and nitro 

 lime supplying the same nitrogen apparently improved the yield by 1 ton 2 cwt. 

 and 8 cwt. 2 quarters respectively, and 3 and 6 cwt. of magnesia apparently 

 increased the crop by 13 cwt. and 1 ton 5 cwt. respectively. Invicta proved the 

 most productive variety of swedes tested. The use of 70 lbs. of nitrate of soda 

 produced lower yields than the standard dressing alone, or that of standard 

 dressing with 6 cwt. per acre of a basic turnip manure containing lime. The 

 latter also, however, produced lower yields than the standard dressing alone. 



Yellow Globe mangel was the highest yielding variety tested. Top-dressings 

 in all cases resulted in a marked increase in yield, 1 cwt. of nitrate of soda 

 apparently excelling 1 cwt. of nitro lime. Common salt proved advantageous 

 up to 6 cwt. per acre with little to choose between 2 and 4 cwt. 



The highest yield of hay, 2 tons li cwt., followed an application of 12 tons of 

 farmyard manure per acre, while applications of (1) 10 cwt. basic slag and 1 

 cwt. sulphate of potash, and (2) 10 cwt. basic slag and 1 cwt. nitrate of potash 

 resulted in almost equally good yields. The lowest yields in the experiment 

 followed an application of 2 tons of lime per acre. 



Rotations, P. McConnell (Jour. Roy. Agr. 8oc. England, 69 (1908). pp. 

 17-32 ) . — Rotations are discussed with special reference to the cleaning of land, 

 economy of plant food, insect and fungus pests, soil texture, climate, arrange- 

 ment of fields, distribution and supply of labor, variety of crops, and live stock. 

 A summary of rotations as returned by correspondents includes courses of 3, 4, 

 5, 6, and more years. 



[Variety tests with peanuts and fodder crops], A. J. Brooks (Imp. Dept. 

 Agr. West Indicfi, Rptft. Hot. Sta. Dominica, 1908-9, pp. 32-35). — Among 4 varie- 

 ties of peanuts the Spanish and Carolina Running varieties yielded 1,940 and 

 1,137 lbs. per acre, respectively. Bascom corn and teosinte produced 12.7 and 12 

 tons of fodder per acre, respectively, and proved suitable for poor sandy soil in 

 a dry situation. Guinea grass and Rural Branching Doura produced 11.6 and 

 7..5 tons of fodder per acre, respectively. 



[Agricultural and botanical explorations in Palestine], A. Aaronsoiin 

 (U. S. Dcpt. Agr., Bur. Plant Indus. Bui. 180, pp. 20-33, 3()^')2, pis. 8, figs. 2).— 

 The carob tree yields a greater quantity of food matter i)er acre on arid soil 

 than the best alfalfa, the pods containing 40 per cent or more of sugar and from 



7 to 8 per cent of protein. It appears that berseem (Trifolium alcd'andriniun) 

 originated in Palestine, since it grows wild there as do T. carmeli, T. panor- 

 mitanum, and T. supinum. Atriplex palestina, .4. halimus, and A. leucoclnda 

 are well adapted to alkaline soils. A. Icucoclada grows from 3 to 6 ft. high and 

 is relished by sheep and camels. The stems and the leaves of the Palestine 



