摘要:

Rates of NO3-disappearance under anaerobic conditions, from six widely differing soils, gradually increased and then became relatively constant when glucose was added in increments supplying 0.04 to 1.5 mg of C/g of soil. Maximum rates of NO3-loss ranged from approximately 9.3 to 13.7 percent/hr. Increased production of NH4+accompanied glucose additions in all soils. Results based on13N-labeled Ca(NO3)2showed that substantial amounts of NO3-were reduced to NH4+after 4 hr of anaerobic incubation, and15NH4+continued to increase until all or most of the15NO3-had been converted to NH4+, organic N, and gaseous forms (N2and N2O). Results seriously challenge the prevalent view that denitrification accounts for essentially all NO3-dissimilation in anaerobic soils.

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID

摘要:

A power-driven undisturbed soil core sampler was designed to obtain undisturbed soil cores from a much greater depth than the original hand-operated sampler.

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID

摘要:

Relations between sorptivity and diffusivity derived for nonswelling materials have been applied recently to swelling materials. It is shown here that such applications are invalid and that relations that are specific to swelling materials must be used. A possible relation between sorptivity and diffusivity for swelling materials is proposed here for the case of desorption. The results are used to reinterpret experimental observations.

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID