A STUDY OF SOME FACTORS AFFECTING SOIL TEMPERATURE IN SOME SOILS OF EGYPT.

Karem, H. M. A.; Mohamed, M. M.; Mashhour, A. M. A.; Wakeel, A. A. A. AI.

doi:10.21608/jssae.2005.227509

A STUDY OF SOME FACTORS AFFECTING SOIL TEMPERATURE IN SOME SOILS OF EGYPT.

Document Type : Original Article

Authors

Soil and Water Dept. Fac. of Agric., Al—Azhar Univ., Cairo, Egypt.

10.21608/jssae.2005.227509

Abstract

A ﬁeld study was carried out at El-Menia and El-Sharkia regions. Two locations were chosen for each region. Each one was divided into two areas. One of them was cultivated and the other was left without cultivation. Daily soil temperature for 2.5 ,5.10 and 20 cm soil depths at 8 AM. and 14 PM. was estimated during two seasons of (199912000) years in three cases of soil moisture levels which are 100% 75% and 50% of the soil ﬁeld capacity, The obtained results indicated that : 1- There is a positive signiﬁcant correlation between air and soil temperature. The soil temperature values made the following ascending order: July> Aug.>Jane> May for summer season and Nov.>March>Dec. > Feb? Jan. for winter season. 2- The previous relation was affected by the soil texture according to the following ascending order sandy b clayey for Ei-Sharkia soil and loamy sand > clayey for El-Menia one. 3- The soil temperature decrease with soil depth increase. 4- Also. highly signiﬁcant correlation was obtained between soil and air temperature where the maximum values were recorded at 14 PM Soil temperature variations were noticed for the unplanted soils than in planted soils, 5- Highly signiﬁcant relation was obtained for soil temperature at lower moisture levels at 50% of ﬁeld capacity.