شماره 2 تاریخ انتشار 1989-09-23
- Pprediction of runoff and sediment from agricultural watersheds by a mathematical model 1:introducing answers
- The effects of N,P and K fertilizers on the concentrations of these elements in petioles and tubers of potato
- An economic study of dairy farms : a case study of dairy farms around shiraz
- Reesponse of laying hens fed on different dietary sulphur amino acid supplemented with maize oil
- Problems of rural social studies in khozestan iran