A field experiment was conducted at the Field of the college of Agriculture at Abu – Ghraib in Silt clay Loam soil at 2008 – 2009. Treatments included Cow manure at Levels 0, 20, 40 T. h-1 and Sheep manure at Levels 0, 20, 40 T. h1- in randomized complete blocks design with three replicates and their effects on increasing the availability of macro nutrients N, P, K, in soil and increasing the yield of Garlic. Samples of soil have been taken before planting and 150 days after planting.
Results showed that the highest concentration of N, P, and K on the higher level of availability of N, P, and K was at levels 40 T. h-1 of cow and sheep manure consequently . Also higher yield of Garlic was achieved at Level (40 T.h-1) as it reached 17.29 and 16.47 T.h-1 for each of cow and sheep manure consequently in comparison with control treatment (13.53) T.h-1. The results proved an increase in the number of leaves/plant as well as in the height by cm at this level of addition too.