dc.creator |
Msanya, B. M. |
|
dc.creator |
Mwasyika, T. A. |
|
dc.creator |
Amuri, N. |
|
dc.creator |
Semu, E. |
|
dc.creator |
Mhoro, L. |
|
dc.date |
2019-02-04T05:53:59Z |
|
dc.date |
2019-02-04T05:53:59Z |
|
dc.date |
2018-11-04 |
|
dc.date.accessioned |
2022-10-25T08:50:56Z |
|
dc.date.available |
2022-10-25T08:50:56Z |
|
dc.identifier |
https://www.suaire.sua.ac.tz/handle/123456789/2744 |
|
dc.identifier.uri |
http://hdl.handle.net/123456789/90829 |
|
dc.description |
Journal of Annals of Advanced Agricultural Sciences, 2018; 2 (4): 59-73 |
|
dc.description |
Pedolological characterization was done in Dodoma Capital City District, Tanzania.
Three soil profiles developed from in-situ weathering of granic rocks and designated as HIS-P1, HIS-
P2 and HIS-P3 were described. Fifteen samples were taken from genetic horizons and analyzed for
physical and chemical characteristics. The soils were generally very deep, with varying textures.
Whereas profile HIS-P2 was dominantly loamy, profiles HIS-P1 and HIS-P3 were both clayey but the
latter had heavy clay type. In profile HIS-P1, clay eluviation-illuviation was a dominant pedogenic
process manifested by presence of clay cutans in the subsoil. Profile HIS-P2 displayed redoximorphic
features due to fluctuating water table. Shrinking and swelling, and argilli-pedoturbation were typical
pedogenic processes in profile HIS-P3. Profile HIS-P1 had more developed structure (subangular
blocky) followed by HIS-P3 and lastly profile HIS-P2 which was structureless massive breaking into
weak subangular blocks. Whereas topsoil bulk density values of the soils were within acceptable
range, subsoil BD values are likely to cause problems of root penetration particularly for deep rooted
crops. Profiles HIS-P1 and HIS-P3 may present limitations to crop growth due to high pH values (>
7.5) in the subsoil which may limit availability of plant nutrients e.g. phosphorus. Organic carbon
and nitrogen were generally low and very low in all profiles with most values being < 1.25% and <
0.10%, respectively. Availabe P values were low to very low (< 7 mg/kg) throughout the three
profiles. Topsoil base saturation values were high (> 50%) in profiles HIS-P1 and HIS-P2 but very
high throughout proflie HIS-P3 (83 - 118%). Zn and Fe levels were rated as inadequate for crop
production. According to USDA Soil Taxonomy, the soils were classified as Typic Rhodustults (HIS-
P1), Fluventic Dystrustepts (HIS-P2) and Chromic Calcitorrerts (HIS-P3) corresponding to Haplic
Cutanic Acrisols, Haplic Cambisols and Calcic Mazic Vertisols in the WRB for Soil Resources. The
three soils had different physico-chemical properties, hence the need to characterize soils before
fertilizer recommendations is met. |
|
dc.format |
application/pdf |
|
dc.language |
en |
|
dc.publisher |
Isaac Scientific Publishing |
|
dc.subject |
Soil morphology genesis |
|
dc.subject |
Physical properties |
|
dc.subject |
Chemical properties |
|
dc.subject |
Soil classification |
|
dc.subject |
Dodoma |
|
dc.subject |
Tanzania |
|
dc.title |
Pedological characterization of typical soils of Dodoma Capital City District, Tanzania: soil morphology, physico-chemical properties, classification and soil fertility trends |
|
dc.type |
Article |
|