تاثير عمليات كشاورزي (ديم كاري ) در تخريب اراضي در استان زنجان (خدابنده )

An Investigation of the Effect of Agriculture (Dry Farming) on Land Degradation

Iran is one of the countries located in the desert belt of the world with this always having caused major problems. Beside the adherent susceptibility of Iran for desertification, maltreatment of natural resources has added to the intensification of this process. One of the most significant factors to he tackled is the agriculture issue. Therefore, it is essential to do more research on agricultural lands in different parts of the country especially in semiarid regions where the desert extension along with agricultural land deterioration is more pronounced. Research must be done to determine whether the region is suitable for agriculture or not, and if suitable what kind of agriculture should prevalently be prevalently applied so as not to face problems in either production or land utilization, also, to prevent land deterioration in the region. To achieve this, a region in Khodabandeh (Ghydar), Zanjan province was chosen for study. Based upon previous soil studies, some blocks of land were specified and then different kinds of agriculture on these blocks were compared in a completely randomized block scheme. Different maps of the region were produced using geographical information system (GIS). Yields in agricultural products were evaluated. Soil sampling in each part of the agricultural land was done. Soil factors in a depth of 0-30 centimeter were evaluated. Two classes of information, namely soil improvement factors of nitrogen, phosphorus, potassium, humus, lime as well as soil-deterioration indicating factors including pH, EC, SAR were measured. The study of factors in a Completely Randomized Block Scheme showed that there were significant differences among treatments (agricultural lands). A comparison of treatment means, using Duncan Mean Comparison indicated dry land farming on sloping land as the most unsuitable treatment and the treatment of multi cultivation irrigated land as the most suitable one.