caa a22 4500 386326762 CHVBK 20180307111655.0 cr unu---uuuuu 161130e198901 xx s 000 0 eng 10.1017/S0014479700016471 doi S0014479700016471 pii (NATIONALLICENCE)cambridge-10.1017/S0014479700016471 Population, Growth and Water Use of Groundnut Maintained on Stored Water. IV. The Influence of Population on Water Supply and Demand [Elektronische Daten] The objective of this paper is to identify the major factors responsible for the differences in transpiration rate (T) between stands of groundnut grown at three row spacings on stored water in central India. A method of analysis is developed to distinguish between the impact on transpiration of ground cover (which varied threefold between spacings) and of root:shoot ratio, which was substantially greater in the wider row spacings. When the soil was wet, both T and the canopy conductance, gc, were approximately proportional to the fraction (f) of incident radiation intercepted by foliage. But when the soil water content decreased below a threshold value, T/f and gc/f decreased because of an increase in stomatal resistance. Stomatal closure in response to soil water stress occurred sooner in the denser stands, partly because of more rapid depletion of soil water. A second contributory factor was that the sparser stands (which had a relatively large root:shoot ratio) had a greater capacity to keep stomata open as the soil water deficit increased. Copyright © Cambridge University Press 1989 Simmonds L. P. Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD, England Azam-Ali S. N. Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD, England Experimental Agriculture Cambridge University Press 25/1(1989-01), 87-98 0014-4797 25:1<87 1989 25 EAG https://doi.org/10.1017/S0014479700016471 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0014479700016471 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Simmonds L. P. Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD, England NATIONALLICENCE 700 1- Azam-Ali S. N. Department of Physiology and Environmental Science, University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD, England NATIONALLICENCE 773 0- Experimental Agriculture Cambridge University Press 25/1(1989-01), 87-98 0014-4797 25:1<87 1989 25 EAG CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge