A randomized complete block design experiment was conducted for two years, two locations per year and three months per location with three replications. The rates of dried, milled pure poultry and sheep manures incorporated per location at the onset of the research were 0, 30 and 60 % N. Initial soils and manures were analyzed for macro nutrients. Soil samples collected weekly, bi-weekly and monthly at soil depths (0 – 5, 5 – 10, 10 – 20 and 20 – 40 cm) for (1st, 2nd, 3rd, 4th, 6th, 8th and 12th weeks) were analyzed for total nitrogen (g kg-1) using standard procedures. Applied poultry and sheep manures increased soil total N compared with control. Across the soil depths, soil total N contents decreased. Highest application of manures improved soil total N with the trend of P60S30 > P60S0 > P30S0 > P60S60. Consequently, this research revealed that addition of poultry and sheep manures at 60 and 30 % N improved the soil total N. Further research is recommended to check this fact.
SAKA et al. (Fri,) studied this question.