254 



INDEX 



Oat-grass, 204 

 Oats, 213 

 O'Brien, J)., 239 

 Ocean: 



as source of alkali, 21 



water, 18 

 Olives, 220 

 Onions, 217 

 Open drain, 172 

 Orange, 220 

 Orchard: 



grass, 202 



killed by alkali, 39 

 Organisms and soil fertility, 132 

 Origin of: 



alkali, 16 



hardpan, 123 

 Osterhout, W. J. V., 117, 118 

 Otto, R., 239 



Oudh Province, alkali in, 13 

 Outlets, 18S 



Pagnoul, A., 149, 152 



Parson, J. L., 190 



Patten, H. E., 150, 151, 152 



Peach, 220 



Pear, 220 



Peas, 200 



Peimersel, R. L., 80 



Pepper grass, as alkali indicator, 64 



Persia, alkali in, 13 



Peterson, Wm., 22, 30, 33 



Pfeffer, W., 36, 41 



Phillips, A. J., 190, 191 



Phosphates, effect on capillarity, 128 



Physical condition of soil, 119 



Pigweed, as alkali indicator, 64 



Pinckney, R. M., 174, 190 



Pittman, D. W., 53, 104, 203, 222 



Plant descriptions, 74 



Plants as indicators of alkali, 60, 63 



Plasmolysis of cell, 35 

 Plowing under alkali, 158 

 Plowmans' wort, as alkali indicator, 



64 

 Pomegranate, 221 

 Poplars, 221 

 Poncelet's formula, 178 

 Port Said, rainfall of, n 

 Potatoes, 216 

 Practical drainage, 167 

 Prairie grass, 206 

 Precipitation records, n 

 Preliminary survey, 1 76 

 Preparing solution of soil, 81 

 Prevention of water absorption, 34 

 Proso millet^ 208 

 Prune, 220 



Puchner, II., 144, 152 

 Punjab, alkali in, 13 

 Purple top: 



as alkali indicator, 63 



grass, 206 

 Pyrrocoma, as alkali indicator, 64 



Quantity of salts to reduce yields, 56 



R 



Rabbitt brush, as alkali indicator, 



63, 73 

 Radishes, 217 

 Rape, 209 



Rate of alkali movement, 14S 

 Reclamation: 



by cropping, 162 



methods, 154 



system in Egypt, 12 

 Red clover, 200 

 Red top, 203 



Reduced yields from salts, 56 

 Reducing evaporation, 155 

 Reh commission, 13, 14 

 Reh lands, 13 



