SOILS 



Other hand, is made up of the remains of plants 

 decayed under the water of bogs and swamps. 

 Neither form of humus can be used alone, as 

 both are deficient in certain nutrient substances 

 necessary to secure good growth. Although 

 too light and open to be used alone, they are 

 excellent to mix with stififer soils in order to 

 make them more porous. 



MIXED SOILS 

 The largest part of our soil does not belong to 

 any of these three types but is a mixture of them. 

 A mixed soil is the one that gives the best results 

 as it contains not only the substances necessary 

 for good plant growth, but also the proper 

 physical properties. Some soils are in fairly 

 definite combinations, and have special names. 



LOAM 

 A loam is a soil containing from 40 to 60 per 

 cent, of sand, the remainder being clay. Often 

 a part of the clay and sand is replaced by humus 

 and the soil has a black appearance. This is 

 spoken of as black loam. A loam of this kind 

 makes a suitable soil for most plants. 



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