1918] FIELD CROPS. 337 



compared, Indigo giving the best average results for the past eight years. 

 Green manure supplemented by 1 cwt. of bone meal and 0.25 cwt. of potash 

 increased the yields of rice by 426 lbs. per acre in 1916, with a similar increase 

 of 474 lbs. in 1915 and a four-year average increase of 138 lbs. 



[Report of field crops work at the Samalkota Agricultural Station], G. R. 

 HiLSON and D. Balakkishnamurti (Dcpt. Agr. Madras, Rpt. Sa)ii(ilIcota, A<jr. 

 Sta., 1913-lJf. pp. Jf-lS; 1914-15, pp. 2-31; 1915-16, pp. 2-21; 1916-17, pp. 18).— 

 Variety, cultural, and fertilizer tests with sugar cane and rice (both wet and dry 

 paddies) are reported for 1913 to 1917, inclusive. 



Tests on limed and unlimed sugar cane plats showed an increased yield of 

 7,400 lbs. per acre in favor of the unlimed plat in 1916. Applications of 1,640 

 lbs. of castor-oil cake showed increased yields in 1915 and 1916 over applica- 

 tions of 10 tons of cattle manure and 820 lbs. of castor-oil cake. 



Plowing the dry rice paddies resulted in increased yields of both grain and 

 straw over the unplowed paddies. The residual effects of castor-oil cake alone 

 and in combination with potash and acid phosphate are reported in yields of 

 rice grain and straw for each year from 1909 to 1917, inclusive. Applications 

 of 820 lbs. of castor-oil cake and 2 cwt. of acid phosphate appear to have given 

 consistently higher yields than the untreated checks, whereas the castor-oil 

 cake supplemented by 1 cwt. of potash has given yields lower than the chec.k ;. 

 The green-manured paddy land supplemented by 2 cwt. of acid phosphate has 

 given increased yields since 1909. 



Tests with complete fertilizers supplemented by rice straw are also reported, 

 together with their residual effects. Applications of 4 cwt. of ammonium sul- 

 phate, 2 cwt. each of acid phosphate and potassium sulphate, and 5 tons of 

 paddy straw have shown increased yields of grain in the main crop four years 

 out of six, and in the second crop two years out of four, over a similar fertilizer 

 treatment without the straw. The yield of straw has been increased each year 

 since 1911 in the main crop, and in 1914 and 1915 in the second crop by the addi- 

 tion of the straw. 



Grasses and clovers under irrig'ation, J. M. Pitt {Agr. Gaz, N. S. Wales, 28 

 (1917), No. 2, pp. 77-82, figs. 4). — In addition to the grasses and clovers men- 

 tioned previously by McDiarmid (E. S. R.. 33, p. 228) the following are recom- 

 mended as worthy of trial in establishing pastures under irrigation in New 

 South Wales: Lolium westcrnivoldicum, Bronius japonicus, Eriochloa annulata, 

 Andropogon intermedius, Trifolium suMerraneum, Melilotus alba, Medicago 

 tuberculata, M. hispida, M. hispida sardoa, and M. hispida reticulata. 



Phalaris bulbosa is reported as being the most promising winter, spring, and 

 early summer perennial yet tested. B. inermis, Setaria nigrirostis, and 

 Boutelona curtipendula gave good results, while of the native grasses previously 

 mentioned Panicum prolutum and A. sericeus are reported as yielding large 

 quantities of forage and .seed. 



The Egyptian, red, and crimson clovers again gave good results. 



Effect of plants on others, B. L. Hartwell (Bui. R. I. State Col, 12 (1917), 

 No. 4, P- 23). — In 1913 buckwheat followed onions, rye, buckwheat, and redtop 

 in the field without fertilizer, with yields amounting to 21, 21, 13, and 10 bu. per 

 acre, respectively. The same crops were grown for two years in pots under 

 various fertilizer treatments, and were again followed by buckwheat in 1916, 

 resulting in yields in the same relative order as noted above. 



Alsike clover sown in 1916 yielded approximately 2 tons of hay per acre 

 after potatoes, rye, redtop, and squashes, 1.4 tons after red clover, and 1.3 tons 

 after alsike clover itself. 



