Soils and fertilizers . the conditions enumerated above. 276. Response of sandy and of clay soils to fertilizers. —It is generally recognized that a sandy soil responds morepromptly to the appUcation of fertilizers than does a claysoil. There are probably two reasons for this : (1) Absorp-tion may not be so complete both on account of the particlesbeing larger, and because in many sandy soils the particlesare largely composed of quartz, which does not have theproperty of forming combinations with bases, as does cla-;(2) Drainage and aeration are Hkely to be better, as are mootof those conditio
Soils and fertilizers . the conditions enumerated above. 276. Response of sandy and of clay soils to fertilizers. —It is generally recognized that a sandy soil responds morepromptly to the appUcation of fertilizers than does a claysoil. There are probably two reasons for this : (1) Absorp-tion may not be so complete both on account of the particlesbeing larger, and because in many sandy soils the particlesare largely composed of quartz, which does not have theproperty of forming combinations with bases, as does cla-;(2) Drainage and aeration are Hkely to be better, as are mootof those conditions that make plant-food materials For these reasons, a sandy soil generally makesa greater response to fertihzers the first year, but shows le^seffect in subsequent years unless the treatment is the other hand, less fertilizing material is lost from a claysoil by leaching. 277. Cumulative need for fertilizers. — It is often re-marked that on land habitually fertilized there is a gradually. A sufficient supply of moisture makes a fertilizer more effective. Notethe greater response to fertilization in the vessels having more moisture. Vessel 78. Moisture 30 per cent,Moisture 15 per 30 per cent,Moisture 15 per 30 per 15 per cent, no fertilizer,no fertilizer,complete fertilizer,complete fertilizer,more fertilizer,more fertilizer.
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