English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The effect of four sources of organic manures (alfalfa residue, cow, chicken and sheep) and their concentrations (0, 1 and 2%) on the enzymatic activity of three calcareous soils from Northern Iraq have been studied in a 45-day incubation experiment at 28C and 90% of the field capacity. During this period, the activity of urease, asparginase and glutaminase have been measured at a 2-week intervals. Results indicated that the more the concentration of the added manure, the more the activity of the enzymes. Addition of alfalfa residue resulted in more activity, followed by chicken manure, then sheep. The least effect was obtained in soils treated with cow manure.

EFFECT OF TYPE OF ORGANIC MANURE AND CONCENTRATION ON THE ENZYMATIC ACTIVITIES OFSOME CALCAREOUS SOILS FROM NORTHERN IRAQ