Yasir E. Mohammed , Ahmed M. El Naim , Tarig E. Ahmed , Abdelatif A. Sulaiman , Omer A. Bakhit , Khalid A. Ibrahim (2019). Physiological Aspects of Yield Variation among Seven Groundnut Genotypes Cultivated Under Rain-Fed Conditions. International Journal of Sustainable Agricultural Research, 6(3): 117-124. DOI: 10.18488/journal.70.2019.63.117.124
A field experiment was conducted at two locations, in North Kordofan under rainfed conditions for two consecutive seasons (2005/06 and 2006/07), to study the physiological aspects of yield variation among seven groundnuts (Araichis hypogaea L.), genotypes (Barberton, Sodiri, Gubiesh, ICGV89171, ICGV93296, ICGV86744 and ICGV92126). The parameters related to morpho-physiological traits were measured: growth rate (CGR), relative growth rate (RGR), specific leaf area (SLA), net assimilation rate (NAR), leaf area (LA), leaf area (LAI) and yield. The results of the combined analysis showed that there were no significant (p =0.05) differences among varieties for the measured morpho-physiological traits throughout the season. Mean seasonal pattern of these traits indicated that the maximum LAI, SLA, CGR, RGR and NAR were attained 65 days after planting. Significant varietal differences were observed for pod yield, hay yield, 100-seed weight and pod maturity. The highest pods yields of 551, 545 and 540 kg ha-1 were recorded by Barberton, ICGV89171 and Sodiri, respectively.
This study is one of the very few studies which have investigated the effect of genotypes on growth and yield of groundnut related to morpho-physiological traits in the traditional rain-fed sector of North Kordofan, Sudan
Study on Temporal Alterations in Land Cover Types in Simien Mountain National Park, Northwest Ethiopia
Getinet Masresha (2019). Study on Temporal Alterations in Land Cover Types in Simien Mountain National Park, Northwest Ethiopia. International Journal of Sustainable Agricultural Research, 6(3): 125-136. DOI: 10.18488/journal.70.2019.63.125.136
This study was carried out in Simien Mountain National Park (SMNP) of Ethiopia to trace the temporal dynamics in land use types from the information generated through the analysis of land sat images. Results revealed that throughout the study period, variable extent of changes was observed in land use classes. In the first reference period (1972 - 1994), agricultural (9945.56 ha) and barren land (3066.6 ha) showed a remarkable increment whereas other land use types were decreased. In the second reference period (1994 - 2017), montane forest, grassland and shadow showed increasing trend with the dramatic change in grassland. In the first reference period (1972 - 1994), maximum negative rate of change was observed for Erica forest with deceleration rate of 83 ha/year which continued in the 2nd reference period (1994 - 2017) with the change decreasing rate of 16.6 ha/year. Maximum positive rate of change (74.6 ha/year) was observed for agricultural land followed by barren land (68.6 ha/year). In the second reference period maximum positive rate of change was observed for grassland with accelerated rate of change 260.5 ha/year whereas maximum deceleration rate (272.8 ha/year) was observed for agricultural land. At present, montane forest cover is increasing whereas agricultural land is decreasing dramatically contributing for the restoration of the ecosystem. However, intensified grazing was identified as a principal driver affecting ecological process in the Park; therefore, a long term strategy should be designed to meet the sustainable utilization of natural resources in the Park.
This study contributes to the existing literature by providing basic information for other researchers regarding land use change in Simien Mountains National Park, Ethiopia. In addition, this study documents the current trends land use dynamics in the Park.