http://repository.rjt.ac.lk/handle/123456789/4827 2026-04-13T06:35:38Z http://repository.rjt.ac.lk/handle/123456789/4838 Does Microcredit Play a Role in Improving the Technical Efficiency of Paddy Farmers? A Case Study in the Anuradhapura District of Sri Lanka Perera, S.M.S.D.; Dissanayake, S.N.; Rajapaksa, D.; Lankapura, A.I.Y. 2021-06-01T00:00:00Z http://repository.rjt.ac.lk/handle/123456789/4837 Avifaunal Diversity and Water Quality Analysis of Urban Wetlands of Colombo, Sri Lanka Munaweera, T.I.K.; Bandara, K.V.S.N. 2021-06-01T00:00:00Z http://repository.rjt.ac.lk/handle/123456789/4836 Effect of Harvesting Damages on Cyanide Levels in Different Tuber Zones of Two Commonly Cultivated Cassava Varieties in Mapalana, Sri Lanka Perampuli, P.A.B.N.; Singharathne, S.M.S.J.M. 2021-06-01T00:00:00Z http://repository.rjt.ac.lk/handle/123456789/4835 Occurrence and Sustenance of Arbuscular Mycorrhizae in Selected Dry Zone Agricultural Lands in Sri Lanka Arachchige, L.I.D.; Balasuriya, A.; Cseke, L.J.; Nathan, M.V.; Samarakoon, M.C.; Jayaneththi, J.P.H.U. Arbuscular mycorrhizae (AM) are one of the important symbiotic microorganisms that provide a primary natural pathway for soil/plant nutrient transfer. The prevalence of AM on Reddish Brown Earth soils in the dry zone was determined under three agronomic management regimes: least-, moderate- and well-managed at Kiralogama, Puliyankulama, and Medawachchiya, respectively, in the Anuradhapura District. Arbuscular mycorrhizae interactions were evaluated with varieties each; sesame (Sesamum indicum L.), bitter gourd (Momordica charantia L.), cowpea (Vigna unguiculata (L) Walp.), chilli pepper (Capsicum annuum L.) and tomato (Solanum lycopersicum L.), and locallycommon four weed/non-crop species; akmella (Synedrella nodiflora (L.) Gaertn.), balathana (Eleusine indica (L.) Gaertn.), kurakkan (Eleusine coracana (L.) Gaertn.), and wal-rubber (Euphorbia heterophylla L.) in pot experiments. Rhizosphere soils at the well-managed Medawachchiya site recorded the highest number of average live (1312) and dead (2637) spores per 100 g of soil retained on 125 µm sieve compared to the lowest live (459) spores at the least-managed site at Kiralogama. At both Kiralogama and Puliyankulama, live spore counts significantly increased with the progress of Maha rainy season. Increases in plant P and Zn concentrations showed strong positive correlations with AM colonisation. Significant differences of both AM colonisation and spore counts were observed in pot experiments depending on the weed/non-crop species and the variety of crops. Akmella (51.2 %), bitter gourd (var. Black - 69.1 %), Sesame (var. Mali - 76.7 %) and wal-rubber (76.8 %) were associated with high levels of AM colonisation as well as soil spore counts. 2021-06-01T00:00:00Z