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Accueil du site → Master → Inde → 2015 → GENESIS, CLASSIFICATION AND EVALUATION OF SOILS IN PAKALA MANDAL OF CHITTOOR DISTRICT, ANDHRA PRADESH

Acharya N G Ranga Agricultural University, Guntur(2015)

GENESIS, CLASSIFICATION AND EVALUATION OF SOILS IN PAKALA MANDAL OF CHITTOOR DISTRICT, ANDHRA PRADESH

ANITHA, T

Titre : GENESIS, CLASSIFICATION AND EVALUATION OF SOILS IN PAKALA MANDAL OF CHITTOOR DISTRICT, ANDHRA PRADESH

Auteur : ANITHA, T

Université de soutenance : Acharya N G Ranga Agricultural University, Guntur

Grade : Master of Science in Agriculture 2015

Résumé partiel
The present investigation involves study of genesis, classification and evaluation of soils in Pakala mandal of Chittoor district, Andhra Pradesh. For this, seven representative pedons were selected in seven different locations of the study area covering all types of soils. All the seven pedons were described for their morphological features in the field and horizon-wise samples were collected and analyzed in the laboratory for physical, physico-chemical and chemical properties. The study area was characterized by semi-arid monsoonic climate with distinct summer, winter and rainy seasons. The pedons selected were located on plains (0-1%), very gently sloping (1-3%) and gently sloping (3-5%) topography. All the Pedons were developed from granite-gneiss parent material The morphological features indicated the presence of AC (Pedons 1, 2 and 6) and ABC (Pedons 3, 4, 5 and 7) profiles. The soils were shallow to very deep in depth, brown to dark greyish brown in colour, sandy clay loam to clay loam in texture and had crumb, sub-angular blocky and angular blocky structure. The clay content decreased with depth in pedons 3 and 6 whereas pedons 1, 2, 4, 5 and 7 had shown no specific trend with depth. Physical constants like water holding capacity, loss on ignition and volume expansion xiv followed the trend of clay content. The bulk density increased with depth in pedons 1, 2, 4 and 6 while the remaining pedons showed an irregular trend of bulk density with depth. The soils were neutral to slightly alkaline in reaction, non-saline and low to medium in organic carbo

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