178 SUCCESSFUL FKUIT CULTURE 



will be needed, but very few good crops are grown, even 

 under these conditions, without considerable cultivation. 

 A very cheap source of organic matter (humus) in the 



Fig. 91 Orange Tree in Tub 



soil may be produced by sowing cover crops of clover, 

 vetch or other leguminous crops about the time the 

 trees are maturing their main annual growth. If there 



