Agricultural Education. 225 



Friday, Dec. 15, 1865. 9 a.m. to 11 a.m. 



I.— CHEMrSTRY APPLIED TO AGEICULTUPE. 



1. Wliat are the sources of the nitrogen in plants ? How is it 

 tliiit the nitrogen whicli forms the largest part of the atmosphere is 

 not available to plants ? 



2. Describe the proj)erties of silica. In what i^arts of jilants is it 

 met with, and what purpose does it aj^pear to serve in them V 



3. What are the chemical changes which barley undergoes in 

 becoming malt '? 



4. Explain by reference to the principles of nutrition how the 

 rational use of the following feeding materials is aftccted by their 

 comjiosition : — linsced-cako. bean-meal, bran, Indian corn. 



5. State the principal differences between fi"esh and rotten dung as 

 to (1) comjiosition and (2) efficacy as manure. 



G. What is the composition of bones ? If I wish to convert 1 cwt. 

 of bone earth into soluble superj^hosphate, what quantity of sulphuric 

 acid must I employ ? State the chemical reaction between these sub- 

 stances and give the calcidation for the quantity. 



7. Sulphiu-ous acid and chloride of lime are severally used as dis- 

 infectants : exj)lain their action. 



8. What is the general composition of urine, and what changes do 

 the compounds contained in it severally undergo by keeping '? 



9. Give an account of the function of the leaves of plants so far 

 as chemical changes in the sap are concerned, and of the influence 

 of light and heat upon this function. 



Friday, Dec. 15, 1865. 11 a.bi. to 1 p.m. 

 II.— CHEMISTPY APPLIED TO AGPJCULTUPE. 



10. Mention some of the j)eculiarities of clay land, and explain the 

 princij)al chemical means of imjiroving it. 



11. Describe the advantages which result from deeji cultivation, 

 and mention instances in which land should not be ploughed deep. 



12. Trace the action of the atmosi^here in converting such a 

 mineral as felspar into valuable ingredients of a soil. 



13. What are the probable functions of Itumus in the soil? 



11. Explain how you can detect whether Peruvian guano is genuine 

 or adulterated. 



15. Give a brief description of the mode of analysing a soil, taking 

 the several steps in order. 



16. Mention some practical points on which you may obtain 

 definite information from soil-analyses. 



17. Can you determine by soil-analyses the relative fertility of 

 different soils ? Give reasons. 



18. In what states of combination does potash usually occur in 

 soils ? How may it be distinguished from soda, and the quantity of 

 it in a mixtui-e of the carbonates be determined ? 



VOL. II. — S. S. Q 



