WHEATGROWING IN AUSTRALIA. 19 



the department, and a table published for the information of wheat- 

 growers. The following is the classification for the season 

 1913-14: 



With regard to time of maturity varieties of wheat recom- 

 mended were classified as follows : 



Very Early. Bunyip, Florence, Firbank. 

 Early. Comeback, Thew, Steinwedel. 



Mid-season. Bobs, John Brown, Cedar, Warren, Federa- 

 tion, Bay,ah, Rymer. 



Late. Jonathan, Marshall's No. 3, Zealand, Yandilla 

 King, Cleveland, Huguenot. 



Very Late. Hayne's Blue Stem. - 



In respect of time of sowing the varieties mentioned above 

 were recommended in inverse order. 



Just as the farmer is advised as to the most suitable varieties 

 of wheat for his district, so experiments are conducted to ascer- 

 tain the most useful quantity of manure, and full particulars made 

 available in the agricultural gazettes or journals which are pub- 

 lished in the different States, as well as being made available in 

 bulletin form. The question of manuring is a very importanc one 

 to the wheatgrower, as it influences the yield greatly in most of 

 the principal areas, if not all. As Australian wheat soils possess 

 abundance of nitrogen and sufficient potash, but are mostly deficient 

 in phosphoric acid, the manure chiefly used on the wheatfields is 

 superphosphates.. There are some localities where further experi- 

 ment is required to definitely ascertain the most suitable fertiliser, 

 but in the main superphosphate is the requirement, and practically 

 the only manure used. This has been the course proved most satis- 

 factory by practical experience in wheatgrowing, and careful ex- 

 periment also with nitrogenous, pathonic, and phosphate manures, 

 singly and combined. Superphosphate has proved superior to bone- 

 dust or basic slag; sulphate of potash has not increased the yield, 

 while nitrogenous fertilisers, such as dried blood or sulphate of 

 ammonia, have proved either useless or harmful. In New South 

 Wales the quantity of superphosphate usually used is 56 Ibs. per 

 acre, and the same quantity is generally applied in Victoria, but in 

 South Australia the dressings are much heavier, running from 

 i cwt. to 2 cwt$. per acre. In New South Wales experiments 

 carried out clearly prove that larger quantities, say, 84-112 Ibs. to 

 the acre, do not result in bigger yields being obtained, while the 



