[343] 



SCIENTIFIC MANUAL. 



57 



Organic 

 Water. Matter. Ash. 



Average of all the grasses 14.3 79.9 5.8 



Average of grains and seeds 14.2 83.3 2.5 



Average of straw 14.4 80.2 5. 4 



Average of chaff and hulls 13.7 77.7 g .6 



Average of roots and tubers 85.7 13.4 ^.9 



Average of green fodder, 79.5 18.8 .7 



Scientific Agriculture - Pendleton. 



These analyses show how small is the per cent, of ash 

 ingredients in plants in proportion to the volatile part 



Nearly the whole of the volatile part, except the water 

 and ammonia, is derived from the atmosphere, while the 

 entire ash is derived from the soil. 



The following tabular view of the relations of atmos- 

 pheric ingredients to the life of plants, given by Prof. John- 

 son in "How Crops Feed," page 98, presents the subject 

 in a condensed form : 



TABULAR VIEW OF THE RELATIONS OF THE ATMOSPHERIC IN- 

 GREDIENTS TO THE LIFE OF PLANTS. 



OXYGEN, by roots, flowers, ripening fruit, and 



by all growing parts. 

 CARBONIC ACID, by foliage and green parts, 



but only in the light. 



AMMONIA, as carbonate, by foliage probably at 

 Absorbed , all times, 

 by Plants. ] WATER, as liquid, through the roots. 



NITROUS ACID, \united to ammonia, and dis- 

 NITRIC ACID, J solved in water through 



the roots. 



OZONE? | Uncertain. 



MARSH GAS? j 



N. / 



Not absorbed/ NITROGEN. 



by plants. \ Water in state of vapor. 



f OXYGEN, ) by foliage and green parts, but only 



OZONE, j in the light. 



Exhaled MARSH GAS, in traces by aquatic plants? 

 by Plants. ^ WATER, as vapor, from surface of plants at all 

 I times, 



| CARBONIC ACID, from the growing parts at all 

 I times. 



