X - 



agencies; Nature's cultivators (earth-worms &c.) ; Chemical and Bacteriologi- 

 cal disintegration ; Physical and Chemical properties of humus ; mixed soils 

 and soils formed at junction of geological formations specially rich. 



Chapter IV. Physical classification of soils. Diluvial, Alluvial and 

 Calluvial ; Light, Heavy, Warm, Cold, Moist, Dry; Garden soils; Pasture 

 land; Wheat soil; Ek-phasli and Do-phasli land ; stony, gravelly, gritty, sandy, 

 clayey and calcareous soils; peat; marsh ; Mechanical analysis ; different kinds 

 of loam; classifications of Settlement officers of different Provinces; Tilth, 

 sub-soil and pans. ......... pp. 44 to 51 . 



Chapter V. Chemical classification of soils. Chemical composition 

 of plants; classification according to chemical requirements of plants (moist, 

 nitrogenous, phosphatic, potassic, calcareous, ferruginous, siliceous, alkali 

 soils and sulphurous soils) ; excess of soluble salts, i. c over 2 parts of solid 

 in 1000 parts of water, injurious; why urine burns up plants; Schubler's 

 classification ; proportions of nitrogen and phosphorus needed; Ville's Normal 

 Manure; Five Plot and Ten Plot Experiments. ............ pp. 51 to 63. 



Chapter VI. Chemical classification of Indian soils. Chemical com- 

 positions of (i) Indo-Gangetic alluvium, (2) Black cotton-soil, (3) Red soils 

 of Madras, (4) Laterite soils, (5) Deccan alluvial tracts, and (6) Dharwar soil ; 

 Peculiarities of Indian soils with reference to Iron, Manganese, Lime, Magnesia, 

 Potash, Phosphoric acid, Sulphuric acid, Carbonic acid and Nitrogen ; Avail- 

 able phosphoric acid in Indian soils, high. ............ pp. 63 to 74. 



Chapter VII. Physical properties of soils. Weight, Porosity, Retenti- 

 vity for water, Capillarity, Hygroscopicity, Evaporation; Coagulation of soil 

 particles; shrinkage and expansion ; colour. ............ pp. 741078. 



Chapter VIII. Meteorological conditions affecting farming. Tem- 

 perature, specific heat, radiation, absorption and retention of heat; evenness of 

 temperature ; maximum and minimum temperatures for crops; soil tempera- 

 ture ; Inclination ; Electric influences; Sunlight; Rainfall, cause of monsoon, 

 amount and distribution of rainfall ; Elevation ; Effects of rainfall ; Hail and its 

 prevention; Weather-chart. ............ pp. 78 to 90. 



Chapter IX. Fertility and Barrenness. Absolute barrenness impos- 

 sible ; practical means of judging relative fertility ; absorbent coefficient of 

 soils; available plant food; acid secretions from rootlets exercising different 

 amounts of solubility ; the law of minimum ; specific causes of barrenness ; 

 usar soils and excess of soda salts. ............ pp. 911094. 



Chapter X. Theories underlying cultivation of soils. Objects of 

 cultivation ; Protracted cultivation for dry season ; but for rabi crops this may 

 be overdone; advantages and disadvantages of deep cultivation ; spacing for 

 fibre and other crops; Drilling and Hoeing; Jethro Tull and Lois Weedon 

 systems; climatic influence on the nature of tillage; nitrification; Drainage 

 and Irrigation; Bakharing ; Trenching ; Ridging or hilling; Subsoiling ; 



