QENERAL IISIDEX 



Absorption — 



— nitrogen, 142 



— nutrients, luxury, 110 



— nutrients by tomato, 109 



— salts, 48, 109, 112 



— salts, contact effects, 119, 120 

 • — salts, by injured roots, 101 



— - salts, from soil solution, 120 



— salts and of water, 74, 75 

 Accumulation — 



— salts, 48, 55 



— salts, aeration effects on, 57, 58, 116, 117 



— salts, bioelectric effects, 65, 66 



— salts, effects on buffer system, 130-134 



— salts, energy relations, 68, 146 



— salts, gradient, 53, 62, 89, 91 



— salts, hydrogen ion effects on, 67, 69 



— salts, leaves and stems, 96 



— salts, light and dark, effects on, 52, 79, 80 



— salts, and metabolism, 54, 55, 83, 126 



— salts, nature of, 62, 67-70, 120, 146, 147 



— salts, and respiration, 126-128, 133-135, 144, 147 



— salts, and respiratory quotient, 133-135 

 — ■ salts, salt status of roots, 77, 81-83 



— salts, selectivity, 48, 61, 110, 111, 132-134 



— salts, sugar status, 83 



— salts, temperature effects, 52, 58, 60 

 Acidity, soils, 13-16 



Adsorption, cations in soil, 12-16 



Aeration, culture solutions, 114-118; plates 2i, 25 



Aeration, effects on nitrogen metabolism, 145 



Alkali soil, 13-15; plates U, 5 



Aluminum, essentiality of, 29 



Amides in ])lants, 139-142 



Ammonia nitrogen absorjition, 142 



Ammonia nitrogen, metabolism, 136-141 



Anion respiration, 127 



Artificial cells, 69, 70 



Artificial cultures, 18, 104; plates 20, 21 



Artificial cultures in study of alkali, 123 



Artificial cultures in study of animal nutrition, 122 



Artificial cultures in study of biochemistry, 124 



Artificial i'lumination for plant growth, 20, 21; plates 6, 7 



Aspartic acid, 141 



Asparagine, 139, 141 



AspertjilluH, micronutrient requirements, 29, 31 



AstragaliLt,', effect of selenium, 44-45 



