Perennial grass having stems 3 to 4 feet high,used especially in Africa and India for pasture and hay. 多年生草，莖高到米，用作牧草和干草，特別在非洲和印度。
Perennial South African grass having densely clumped flimsy stems,introduced into United States especially for erosion control. 南非多年生草，有密集簇生的莖，引入美國主要用于防腐。
Potassium manuring may be less critical in continuous grass farming than in ley farming. 在多年生牧草地施用鉀肥的迫切性比短期草地要小些。
Permanent grass has a number of advantages over clean cultivation, the system it superseded. 多年生牧草較之已被其取代的清耕有許多優(yōu)越性。
