Problems in soil fertility characterization by means of plant nutrient requirements
Wiersum, L.K.
Problems in soil fertility characterization by means of plant nutrient requirements - 1981 - Printed
36 ref.; Summary (En) Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0032-079X
In this discussion an attempt is made to consider the extent to which rates of uptake by roots, as established in plant physiological research, can be used as supply rates towards the roots in the soil system. Multiplying measured total root length or surface in the field with rates of water influx gives amounts of water use that are usually somewhat higher than those actually occurring in the field. This may be due to the fact that the level of activity of older roots is unknown and cannot be taken into account. The high influx values of mineral nutrients obtained in physiological research can only be used if we can delineate the size and location of the actively absorbing root surface, define the actual soil-root contact and obtain more information on activity variations of roots during periods of stress
English
1573-5036 (Revista en electrónico)
Fertilizers
Soil fertility
82-765113
Problems in soil fertility characterization by means of plant nutrient requirements - 1981 - Printed
36 ref.; Summary (En) Peer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0032-079X
In this discussion an attempt is made to consider the extent to which rates of uptake by roots, as established in plant physiological research, can be used as supply rates towards the roots in the soil system. Multiplying measured total root length or surface in the field with rates of water influx gives amounts of water use that are usually somewhat higher than those actually occurring in the field. This may be due to the fact that the level of activity of older roots is unknown and cannot be taken into account. The high influx values of mineral nutrients obtained in physiological research can only be used if we can delineate the size and location of the actively absorbing root surface, define the actual soil-root contact and obtain more information on activity variations of roots during periods of stress
English
1573-5036 (Revista en electrónico)
Fertilizers
Soil fertility
82-765113