Effect of age of farm, corm size and manure fertilizer treatments on morphological criteria of Saffron (Crocus sativus L.) under Mashhad conditions

In order to study the effects of farm age, corm weight and different amount of manure fertilizer on corm yield and stigma yield of saffron (Crocus sativa L.), an experiment was conducted based on randomize block design with three replications, for different age of fields, in agricultural research field of Ferdowsi university of Mashhad in three years (2009 to 2011). Treatments were corm weight in 4 levels (>4, 4-8, 8-12, (5.1 gr.m-2) was observed with 20 ton.ha-1 manure, corm weight of 8-12 gr in the field with 3 years age, whereas, the highest corm yeild (725 gr.m-2) was obtained with corm weight (>12gr), 30 ton.ha-1 manure in the field with 3 years age. An optimal stigama yeild obtained with 8-12 gr corm weight, 20 ton.ha-1 manure fertilizer in the field with 3 years age.