أرسل هذا في رسالة قصيرة: Effect of biomats on runoff and water erosion under selected agro-environmental conditions

 _____     _    _     _  __   _    _     ______  
|  __ \\  | || | ||  | |/ // | || | ||  /_____// 
| |  \ || | || | ||  | ' //  | || | ||  `____ `  
| |__/ || | \\_/ ||  | . \\  | \\_/ ||  /___//   
|_____//   \____//   |_|\_\\  \____//   `__ `    
 -----`     `---`    `-` --`   `---`    /_//     
                                        `-`