University of Khartoum

Prediction of the Probability of Good Working Days for Agricultural Operations in Sinnar and Qadarif States

Prediction of the Probability of Good Working Days for Agricultural Operations in Sinnar and Qadarif States

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Title: Prediction of the Probability of Good Working Days for Agricultural Operations in Sinnar and Qadarif States
Author: Homeida, Azza Majdi Alsir; Khair, Israa Zain Alabdeen Ali Mohamed; Mohamed, Mohamed Elhadi Ibrahim
Abstract: This study was carried out aiming at the determination of good working days for agricultural operations (primary tillage, secondary tillage and planting) in Sinnar and Qadarif states for planting sorghum. Actual data of rainfall was taken from metrological authority for the two states for thirty years (1978-2007). A day with rainfall greater than 10mm is considered as not a good working day for the three operations. The probability of a good working day is calculated as: , where (x) is the number of days having rainfall greater 10mm for the period from 1st of May to 30th of November for thirty years. Using the moldboard plow for primary tillage, tandem disc harrow for secondary tillage, and row crop planter for planting, field capacity for each implement is calculated for a farm of 1000 feddan (or 420 hectares).With reference to the recommended time of operations from 1st to 15th of July for primary tillage, from 10th to 20th of July for secondary tillage and from 20th to 31st of July for planting, field capacities are 1.925, 2.066ha/hr for primary tillage, 2.687, 3.005ha/hr for secondary tillage and 2.492, 2.753ha/hr for planting for Sinnar and Qadarif states respectively. Taking the practical widths for each implement moldboard 0.7m, tandem disc harrow 6 m and row crop planter 4 m, the number of implements required are 5 moldboard plows, 1 tandem disc harrow and 2 row crop planters. Comparing these results with the results calculated using the model developed by (Omer M.E.Elshami and FawziH.E.Masoud, 2005) in which they used the soil moisture content parameters; the results are nearly similar with a difference of 1 working day. The results of this study can be used by farmers in scheduling their agricultural operations and selecting optimum sizes of machines.
URI: http://khartoumspace.uofk.edu/123456789/25600
Date: 2016-11


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