Print ISSN: 2077-5822

Online ISSN: 2618-1479

Keywords : ray

A Comparative Study of the Properties of Mica in Rhizosphere and Bulk Soil Under Different Plant Covering.

Salman K. Essa; Ali I. Hussein Al–Qaisi

Al-Qadisiyah Journal For Agriculture Sciences, 2018, Volume 8, Issue 1, Pages 92-105
DOI: 10.33794/qjas.2018.162658

Results of x-ray diffractions for Bulk soil, represented by the horizontal distance 50H, show the presence of low-crystalline chlorite, smectite and regular interstratified chlorite- smectite in soil under Citrus aurantium trees. Re sults of clay sample in soil of palm tree show a presence of smectite and swelling chlorite, while the presence of the interstratified minerals is very low. Also the results show a presence of swelling chlorite, smectite and Biotite in soil of Morus trees. Generally, the results show that the process of mica transformation into 2:1 minerals in the Bulk soil, is very weak.
The x-ray results show that the rhizosphere soil(0) of Citrus aurantium trees content is smectite and mica, with regular interstratified mica-smectite, while the results show the presence of smectite, chlorite, and regular interstratified chlorite- smectite and mica-smectite, in rhizosphere soil of palm trees. As well as the inspection of clay samples of Morus trees, show the presence of chlorite and smectite with two types of interstratified minerals, irregular smectite-mica and regular mica-smectite.
In general, the results of x-ray show that the transformation process of mica to 2:1 expandable minerals in rhizosphere soil exceeds the Bulk soil of all type of trees. While the superiority of mica weathering, and increase of Smectite content in all rhizosphere soils are taken as in the following sequence:
Morus trees soil > Palm trees soil > Citrus aurantium trees soil

Role of Gypsum and Corn Cobs in Linkage of Peds in Cracking Soils.

Raid Shaalan Jarallah; S. K.Essa

Al-Qadisiyah Journal For Agriculture Sciences, 2017, Volume 7, Issue 1, Pages 143-150
DOI: 10.33794/qjas.2017.124326

To study role of gypsum and corn cobs in linkage of fractions in cracking soils. Three soils (Al-Diwaniya , Al-Wihda and college of Agriculture / Abu Ghraib) were chosen for this study . They were treated with two levels of gypsum (0.5 and 1) % with one level (4%) of corn cobs . In this experiment , 2 kg of each studied soil were treated with same levels of corn cobs and gypsum above and incubated at 30 + 2 °C for 90 days and 80% relative moisture content at 33 kpa. And then the soils were sieved with 1 mm sieve to measured the x-ray diffractions . The results showed :
The intensity of clay minerals peaks which treated with gypsum and corn cobs were decreased comparing with control sample. We believed that the gypsum should be facculated on clay minerals surfaces and mask them to appear clearly , and suggested that the gypsum was played an important role in conjugated of soil particles. Results of X-ray diffractions showed that there was no evidence of interaction between organic matter (corn cobs) and clay mineral inter layers.