caa a22 4500 477109519 CHVBK 20180405111604.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF00010461 doi (NATIONALLICENCE)springer-10.1007/BF00010461 The sensitivity of shoot growth of corn to the least limiting water range of soils [Elektronische Daten] [Alvaro da Silva, B. Kay] The least limiting water range (LLWR), the range in soil water content within which limitations to plant growth associated with water potential, aeration and mechanical resistance to root penetration are minimal, has been proposed as an index of the structural quality of soils for crop growth. An hypothesis that is implicit in the proposed use of LLWR as an index of soil structural quality is that crop growth is negatively related to the proportion of the total number of measurements in which the water content falls outside the LLWR (pout) and therefore given a certain climate positively related to the magnitude of the LLWR. The objective of this investigation was to test the hypothesis that plant response, specifically shoot growth rate of corn (Zea mays L.), can be functionally related to pout and the LLWR of soils. The study was carried out on a farm with a side-by-side comparison of no-till and conventional-till. Thirty two paired sampling sites were located along the two transects. The LLWR and pout were calculated for the 0-20 cm depth in each sampling site. Shoot growth rate (SGR) was measured during a 17 and 16 day period in 1992 and 1993, respectively that corresponded to the 10-11 leaf stage. Although the variation in pout accounted for a larger percentage of the variation in SGR than did LLWR, the correlation between SGR and LLWR was high and justifies further studies to determine if crop yield can be related to LLWR under different soil and climatic conditions. Kluwer Academic Publishers, 1996 corn nationallicence least limiting water range nationallicence shoot growth rate nationallicence soil structural quality nationallicence soil water content nationallicence LLWR : least limiting water range nationallicence pout : the proportion of the total number of measurements in which the water content falls outside the LLWR nationallicence SGR : shoot growth rate of corn nationallicence NT : no-till nationallicence CT : conventionaltill nationallicence CLAY : clay content nationallicence OC : organic carbon content nationallicence Db : bulk density nationallicence θ fc : soil water content at field capacity nationallicence θ wp : soil water content at wilting point nationallicence θ sr : soil water content at critical soil resistance nationallicence θ afp : soil water content with air-filled porosity at 10% nationallicence TDR : time domain reflectometry nationallicence da Silva Alvaro Escola Superior de Agricultura Luiz de Queiroz, Dept. de Ciência do Solo, Universidade de São Paulo, Bolsista do CNPq, 13418-900, Piracicaba-SP, Brazil aut Kay B. Escola Superior de Agricultura Luiz de Queiroz, Dept. de Ciência do Solo, Universidade de São Paulo, Bolsista do CNPq, 13418-900, Piracicaba-SP, Brazil aut Plant and Soil Kluwer Academic Publishers; gopher://gopher:wkap.nl 184/2(1996-06-01), 323-329 0032-079X 184:2<323 1996 184 11104 https://doi.org/10.1007/BF00010461 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00010461 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- da Silva Alvaro Escola Superior de Agricultura Luiz de Queiroz, Dept. de Ciência do Solo, Universidade de São Paulo, Bolsista do CNPq, 13418-900, Piracicaba-SP, Brazil aut NATIONALLICENCE 700 1- Kay B. Escola Superior de Agricultura Luiz de Queiroz, Dept. de Ciência do Solo, Universidade de São Paulo, Bolsista do CNPq, 13418-900, Piracicaba-SP, Brazil aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher:wkap.nl/ 184/2(1996-06-01), 323-329 0032-079X 184:2<323 1996 184 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer