ISSN:
1573-5036
Keywords:
Ammonium
;
Fixed ammonium
;
Maize
;
Mineralization
;
Nitrate
;
Nitrite
;
Rhizosphere
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Significantly lower amounts of exchaneable NH4, soluble NO3 and clay-fixed NH4 forms of N were observed in the unfertilized fields with high rather than low-density cropped plots. Irrespective of planting densitites, the fixed NH4 content in soil increased with increase in the period of crop growth. N uptake by plant and total bacterial population of rhizosphere soil were significantly higher in the plots with the high than with the low-density planting. Availability of native fixed NH4 + to crops and biological utilization of a considerable amount of recently mineralized NH4 + in fixed form is indicated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02375055
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