01183naa a2200241 a 450000100080000000500110000800800410001910000180006024500800007826000090015852005070016765000100067465300150068465300110069965300250071065300240073565300240075965300270078365300320081070000190084270000190086177300610088014176101993-07-05       1965    bl ---       0--  u    #d1 aBARLEY, K. P.  aThe influence of soil strangth on the penetration of a loam by plant roots.  c1965  aSUMMARY - Wheat and pea roots were grown through soil crumbs until they encountered cores of more finely structured earth. The cores were prepared from a loam at various bulk densities and matric suctions. Over a range commonly found in the field, the penetration and growth of the roots were controlled chiefly by the strength of the soil. Soil strength should be regarded as a property that has a general influence on root elongation, rather than as a limiting condition encountered in unusual soils.  aTrigo  aPenetracao  aRaizes  aRaizes - crescimento  aRaizes - penetracao  aSolo - profundidade  aSolo - textura arenosa  aSolos consistentes - raizes1 aFARRELL, D. A.1 aGREACEN, E. L.  tAustralian Journal of Soil Researchgv.3, p,69-79, 1965.