摘要:

A mechanistic numerical model was designed to compare evaporation of soil moisture under steady versus fluctuating evaporativity. The model, written in IBM System/360 CSMP language, requires data on soil hydraulic characteristics and on potential evaporation. It calculates the rate and cumulative quantity of evaporation, as well as the change in profile water content and distribution, as functions of time. Computations carried out for a 10-day simulation illustrate the use of the model. The results confirm experimental findings that the diurnal cycle of evaporativity causes nighttime resorption of moisture and hence an appreciably higher average wetness in the soil surface zone. The results also predict that under cyclic evaporativity, the total evaporation tends to be lower than under the equivalent steady evaporativity.

ISSN:0038-075X    

出版商:OVID    

年代:1975

数据来源: OVID

摘要:

The pesticide methoxychlor, incorporated into a humic material by the fungus Aspergillus versicolor, was subsequently released by the action of another soil fungus (Marasmius oreades). This finding suggests an approach to the study of the retention and persistence of pesticides in soil.

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