41. Once completed, the canal and its irrigation works largely boosted agricultural productivity in the Qin state. 42. The agricultural productivity is very low in Mizoram. 43. The territory is rich in archaeological evidence of its witnesses agricultural productivity ( olive oil, cereals ). 44. The area surrounding the springs consists of Sangamon River wetlands and low bluffs of marginal agricultural productivity . 45. By comparison, modern farming has ratios of 30 : 1 or more ( see agricultural productivity ). 46. The region has been able to sustain its agricultural productivity as it is below the Goyder Line. 47. "Many African countries have potential for great agricultural productivity , " said Borlaug, director of Sasakawa Global 2000. 48. For example, about 4000 BC the Nile was dammed to improve agricultural productivity of previously barren lands. 49. Since draft animals were rare, to say nothing of machinery, actual agricultural productivity was worse than before. 50. Scientific inventiveness, for example, will help raise agricultural productivity and provide ways of feeding the extra billions.
