SOILS, CROPS AND FERTILIZERS. 



15 



Tons of Plant Food in Soils. 



Potash. 

 Tons. 



Sandy Soil 2.42 



Clay Soil 6.38 



Loam 8.70 



Humus 6.39 



Moisture Requirement of Common Crops. 



Water used Depth of Dry matter Acre inches 



matter. 



Tons. 



Barley 464.1 



Oats 503.9 



Com 270.9 



Clover 576.6 



Peas 477.2 



Potatoes 385.1 



Average 446.3 



23.165 



5,987 



3.939 



Approximate Amounts of Water Retained in Plowed and Unplowed Lands. 



1st foot 

 lbs. water. 



Land plowed 13.87 



Land not plowed 10.58 



Loss on unplowed 



3.29 



2nd foot 

 lbs. water. 

 20.66 

 17.98 



2.68 



3rd foot 

 lbs. water. 

 18.32 

 17.28 



1.04 



4th foot 



lbs. water. 



16.05 



13.94 



2.11 



Water Need of Crops versus Rainfall. 



Additional Manurial Requirements of 

 Crops. 



Grasses — Potash, lime and phos- 

 phoric acid. 



Cereals — Nitrogen and phosphoric 

 acid. 



Clovers — Manures supplying pot- 

 ash and lime. 



Legumes — Potash, phosphoric acid 

 (barnyard manure). 



Turnips — Phosphoric acid (also 

 barnyard manure). 



Mangels — Nitrogen (barnyard ma- 

 nure). 



Potatoes — General manuring. 



Water Required For One Acre of 

 Crop. 



Arerage Minitnum 



Amount Amount 



Clover 400 310 



Potatoes 400 325 



Water iLsed compated 

 with rain. 



2.15 

 2.19 

 2.24 

 2.57 



Wheat 350 300 



Oats 375 300 



Peas 375 300 



Corn 300 



Grapes 375 



Sunflowers . . . 2000 



Amount of barnyard manure re- 

 quired to replace the ingrediemta 

 abstracted from the soil by an acre 

 of each crop: 



Tons. 



Wheat 5 



Barley 5 



Oats 5 



Meadow Hay. . 6 

 Red Clover. . .10 

 Beans 10 



Tons. 



Potatoes 10 



Cabbage 20 



Carrots 10 



Turnips 15 



Swedes 12 



Mangolds .... 20 



