The diminution of the morphological variation among the new wheat varieties owing to narrow genetic base makes it essential for the development of rapid and reliable methods for genetic purity maintenance during seed production, as well as for plant variety protection, seed certification, quality control and consumer protection. In the present study, attempts were made to distinguish and identify eighteen of wheat genotypes grown in Libya through chemical tests. The seeds were subjected to phenol, two modified phenol, Ninhydrin, NaOH and KOH tests. Based on the colour reaction of different genotypes. Varietal keys were developed for distinguishing the eighteen varieties. All the six chemical tests categorized the varieties from three to seven classes based on their colour reaction. Although, no single chemical test could distinguish all the varieties, but in combination the six chemical tests identified all the eighteen wheat genotypes individually. Therefore, these simple and rapid tests could be employed for varietal identification in most of cereal crops.
RADIA OMAR MOHAMED SALEM, SEHAM Mohamed Ali Ezweek, , (1-2018)

مجلة العلوم الأساسية والتطبيقية 2004 كثافة ألياف الصوف ونسبة الفقد في صوف الضأن البربري الليبي عبدالكريم أحتاش الملخص أجريت هذه الدراسة على عدد 18 رأس من الضأن البربري الليبي التابع لمزرعة الأغنام بمحطة أبحاث كلية الزراعة. كان متوسط وزن الجزة الخام 2.34 ± 0.21 كجم، وكان متوسط وزن الجزة الخام أثقل في الذكور من الإناث (3.31 ± 0.73 كجم، 1.72 ± 0.13 كجم على التوالي). كان متوسط نسبة الفقد في الصوف 29.7 ±0.26 % ، وكان تأثير عامل الجنس غير معنوي على هذه الصفة، ويعزى انخفاض نسبة الفقد إلى إجراء عملية التغطيس قبل الجز. وكان متوسط عدد ألياف الصوف في وحدة المساحة للضأن البربري الليبي 651 ± 22.2 ليفة/سم2 ، حيث كان تاثير الجنس على هذه الصفة معنوياً ( (P< 0.05 ، فقد بلغ متوسط عدد ألياف الصوف في الذكور والإناث 761 ± 25.6 ليفة/سم2 و 629 ± 19.5 ليفة/سم2 على التوالي. arabic 105 English 0
عبدالكريم امحمد احمد احتاش(12-2004)

A “soil carbon hotspot” (SCH) is a geographic area having an abundance of soil carbon, and therefore higher ecosystem services value based on avoided social costs of CO2 emissions. Soil organic carbon (SOC), soil inorganic carbon (SIC), and total soil carbon (TSC) are critical data to help identify SCH at the farm scale, but monetary methods of hotspot evaluation are not well defined. This study provides a first of its kind quantitative example of farm-scale monetary value of soil carbon (C), and mapping of SCH based on avoided social cost of CO2 emissions using both Soil Survey Geographic (SSURGO) database and field measurements. The total calculated monetary value for TSC storage at the Willsboro Farm based on the SSURGO database was about 7.3 million U.S. dollars ($7.3 M), compared to $2.8 M based on field data from averaged soil core results. This difference is attributed to variation in soil sampling methodology, laboratory methods of soil C analyses, and depth of reported soil C results. Despite differences in total monetary valuation, observed trends by soil order were often similar for SSURGO versus field methods, with Alfisols typically having the highest total and area-normalized monetary values for SOC, SIC, and TSC. Farm-scale C accounting provides a more detailed spatial resolution of monetary values and SCH, compared to estimates based on country-level reports in soil survey databases. Delineation and mapping of SCH at the farm scale can be useful tools to define land management zones, to achieve social profit for farmers, and to realize United Nations (UN) Sustainable Development Goals (SDGs) based on avoided social cost of CO2 emissions. arabic 24 English 105
Elena Mikhailova, Christopher Post, Mark Schlautman, Gregory Post, Hamdi Zurqani(1-2020)