36 



HORTICULTURE 



LECT. II 



spaces left precisely like 3, 4, 5 : fill these spaces with 

 the soil and subsoil taken from G, then go on trench- 

 ing A 2, and when H is reached finish off the work 

 with the subsoil E and the upper soil D. It will be 

 obvious that by placing this near H there is true 

 economy in time and labour over the old practice of 

 taking the trench out right across one end of the plot 

 and conveying the soil, it may be a long distance, to 

 the opposite end for filling in the last trench. 





Al 



3 4 



Ai 



PLAN 



SUBSOIL 



6 |8j 



" 



LONGITUDINAL SECTION 



FIG. 4. TRENCHING GROUND. 



By the method of trenching advised the best 

 and most workable soil is practically kept at the top 

 with the subsoil remaining below it. There is natur- 

 ally a little mixing as the work goes on and it is 

 good, also enough in the first instance. The sub-soil 

 steadily and surely improves, and the more quickly 

 if rough manure, leaves, or soft vegetable matter with 

 lime be spread on it before covering with the surface 

 soil. 



