332 



INDEX. 



Limestone 127 



" decomposition of 13 



" ground 217 



Lucern, cultivation of 200 



M 



Magnesium, compounds of. 114 



Mangels, effects of salt upon 137 



Manufactured manures 224 



Manure, hen, composition of. 202 



Manures, ammoniacal effects of..76-SO 

 " decomposition of in 



the soil 144 



effects of.. 155 



" mechanical effects of 192 



" how mixed with soil 193 



" animal 196 



" liquid, value of. 199 



" farm, composition of 200 



" green, composition of... .206 



" loss of by exposure 201 



vegetable 203 



mineral 213 



" complete 228 



Marl 216 



Matter, two forms only 12 



" organic and inorganic 12 



Meadows, irrigated 175 



" permanent 282 



Mica, composition of. 125 



Mineral manures, value of 223 



Mixture of grasses 283 



Muriate of potash 220 



N 



Night soil, value of, for manure. ..200 

 Niter beds, for making nitric acid 67 



Nitrate of lime 113 



Nitric acid 31-65 



" combination of. 91 



" consumption of by 



crops 66-68 



" in the atmosphere 66 



Nitrogen, its properties 29 



" absorbed by water 30 



" its combinations 30 



" relation of to plant 



growth 84 



" developed in soils 85 



" inacropofhay 85 



" procured from the at- 

 mosphere 85 



" dissolved by water 86 



" in coal 87 



in fertilizers 89 



" how it enters into plants 92 



Nitrogen, in clover 63 



" in urine 1<J9 



Nutriment stored in plants 261 



Oats, cultivation of 298 



Onions, cultivation of. 322 



Orchard grass 283 



Organic elements 16 



Organic matter, properties of 33 



" combination of... 33 

 Organic elements, as plant food... 36 

 " how they en- 

 ter plants 37 



Oxalic acid 110 



Oxidation 23 



Oxygen, its properties 21 



" discovery of 21 



" soluble in water 22 



" consumed in burning 



coal 24 



" consumed in respiration. 24 

 " indispensable to plant 



growth 163 



" absorbed by porous soils.,138 

 Ozone 26 



Peas, cultivation of 302 



Phosphorus 115 



Phosphoric acid 114-116 



Phosphate of lime 114-219 



Pistil, the, and its parts 255 



Plants, how composed 35 



" inorganic elements of. 93 



" substance of, derived 



from the air 93 



" ash of. 94 



" mineral food of. 95 



growth, law of. 97-196 



" composition of. 102-105 



first growth of. 122 



" vary with the soil 151 



" structure and growth of.... 234 



" how they grow 235 



" nutrition of. 239 



" reproductive organs of 253 



" improvement of. 267 



Plant food, in an acre of soil 145 



" removed from the 



soil by crops 147-149 



Plant growth, laws of 152 



Plaster, its composition and uses....H3 



Plow, construction of 161 



subsoil, use of 162 



Plowing, effects of. 160 



