Experiments and Investigations. 479 



Soya Beans. — Six varieties of Soya Beans were included in the 

 Soya Bean Variety Trials. 



Maize. — Experiments have been conducted in connection with 

 "Cultivation," "Varieties," '; Planting-," and " Rotations." 

 Results of these trials will be furnished later. 



Spineless Cactus. — About one acre has been planted with varieties 

 of Spineless Cactus. These are required for distribution later. 



Rotations. — Experiments in connection with maize and wheat 

 rotations are being continued. 



New Importations. — Several new varieties of grasses, pulses, and 

 loot crops were introduced from A'arious places and grown, in most 

 cases, successfully. These included Sudan grass, vSesbania, Dahl 

 bean, Arotalaria, and Jack beans. 



Horticulture. — Spraying experiments for apple-bark blister, and 

 plum bark-cracking disease. For the former, bordeaux mixture, 

 followed by gargoyle red spraying oil has proved very efficacious. 



Pollination tests for Wickson plum : Satsuma has proved to be 

 the best pollinator. 



Tests with Hycol for the control of Black Peach Aphis and 

 Woolly Aphis. 



Fertility and sterility tests by bagging of blossoms. 



Experiments in retarding blossoming with peach, apricot, apple, 

 and pear. 



Chemistry . — Xitrification studies on the dry-land fertilizer rota- 

 tion plots, and on fallow and virgin soils. 



Glucose and starch yields of different vaiieties of maize. 

 The lime requirements of soils, qualitative and quantitative. 

 Methods of making tobacco extracts. 



Agricultural Engineering. — Analyses of charcoals made from 

 different timbers grown in the Union, together with engine trials. 



Entomology. — The control of Mylabris beetles : Results prove 

 tliat hand collecting is the most practicable and effective remedy. 



The protection of seed maize from birds and vermin. 



Storage of grain : Results show that weevils are not able to live 

 in grain stored in sn iron tank rendered air-tight })y sealing with 

 white lead. 



Agonomois grain moth : Results indicate that carbon bisulphate 

 and heat are the only effective killing agents. 



Destructive birds : The effectiveness of poisons is being studied. 



House flies : Dilute solutions of lime sulphur spray with a small 

 amount of sodium arsenite, have proved very effective in destroying 

 flies in stables, gutters, etc. 



Rodents — Protective measures : A separate article on the subject 

 appears in this number of the Journal. 



Plant Breeder. — Hybridization and selection of wheat, kaffir corn, 

 and maize for the improvement of existing varieties and the produc- 

 tion of new ones. 



