Mapping a Survey for Soil Fertility in Tainal Watershed (Bazian plane) Sulaimaniyah Ecosystem Using Application of GIS

Abstract

Soil fertility parameters (nitrogen, phosphorus, potassium, calcium, magnesium, sodium, chloride, calcium carbonate, organic matter) were determined in soil samples that taking from deep 0 – 30cm. In greenhouses sowed with different vegetable cucumber, tomato, pepper, eggplant) in 24 villages of Tainal watersheds (Bazian city-As Sulaimaniyah). In the present study, a new technology of ArcGIS 10.1 was used for mapping. The results obtained from a survey area had 12 km2 (N 35.5731; E 45.1798) for soil fertility. Results show that farmers did not fertile soil based on soil analysis except some farmers in Bagajani sites (N 0.22%, P 92.6 ppm, K 0.038 mEq-L, O.M 2.85%, EC.0.23 dS.m-1).In the same area (N: 35.750, E:45.354), soil in villages (Shuwankara, Zyeka , Gawani ) have the heights ratio in nitrogen comparing to others ( 0.0380% , 0.325% ) . According to the results, all the greenhouses soil samples are low in fertility and need to add appropriate fertilizers. All the soils in other villages’ have the same problem accept one site they were using organic matter before sowing by two months. The study revealed that 82% of the samples were under critical threshold value for soil fertility.