Estimation of soil tillage workdays in a semi-arid area
1992
Simalenga, T.E. | Have, H.
A soil water balance model which estimates soil moisture content on a daily basis was used to predict suitable days for tillage operations in a semi-arid area of Morogoro, Tanzania. The model was tested using sand clay loam soil and the results compared with actual values of soil moisture measured over a period of 2 years. Correlation coefficients of measured and predicted values ranged from 0.942 to 0.998. A workability criteria was established and it was found that the soil is workable when the soil moisture content is at or below 95% of field capacity. Eleven years weather data were used in the model to determine the occurrence of suitable field work-days. The average number of days suitable for soil tillage and planting operations were found to be 34 and 14 days respectively.
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