Cassava is one of the three main kinds of potato (cassava, sweet potato and potato)in the world. Starch content in the root tuber of cassava is very rich. According to measurement,starch content of cassava is higher t...Cassava is one of the three main kinds of potato (cassava, sweet potato and potato)in the world. Starch content in the root tuber of cassava is very rich. According to measurement,starch content of cassava is higher than sweet potato by 70%, higher than potato by 155% andthus is a good food and fodder and can be made as noodles,cakes and biscuits. Moreover, cassava is also very useful in industries. Cassava is mainly applied to size and weave cloth in cotton milland textile mill and is an important export material.The adaptability of cassava is broad,it possesses the characteristics of drought-enduranceand poor-nutrient-enduranec. Baize is situated in Guizhou-Yunnan plateau where mountainsare high and slopes are broad.To plant cassava in large area in such region will be a good way forthe exploitation of poor moutainous region.However, in recent tens years, the cassava species inBaise mountainous region were merely the South Pacific Ocean purple bark species. Because of thelong time planting, the species tend to degenerate and the starch content rate decreases.In orderto popularize the four new species of cassava, the aUthors investigated and studied the growthadaptability, the root tuber output and quality of such four species. In 1996. the field test of thefour new species of cassava had been carried out. After the test, good results had been obtainedand the conclusion report is as follows:展开更多
The importance of agricultural innovations for raising the living standards of farmers has received substantial attention from the economic and political communities. In Ghana, cassava serves as an important source of...The importance of agricultural innovations for raising the living standards of farmers has received substantial attention from the economic and political communities. In Ghana, cassava serves as an important source of calorie and cash crop. Production constraints such as the cassava mosaic disease caused by virus have limit farmers access to productivity potentials and marketing. Breeding efforts attempting to address this constraints have had some success such as the mutant Tech Bankye virus resistant variety. This research, therefore, analysed the impact of some production input on mutant cassava productivity growth in Ghana with the use of Cobb-Douglas production function. Results show that farmers cultivate the mutant variety in addition to other traditional varieties to averse risking in marketing and income. The average cost of production of the mutant variety is higher compared to that of the traditional variety. Eighty percent of the farmers complained difficulty in accessing market for the mutant variety because it could not replace the traditional variety in terms of its texture for the local native ＂fufu＂ production and ＂ampesi＂ and also deteriorate quickly in storage. However, for industrial production of ＂gari＂ and starch, the mutant is the best. Both the mutant cassava and the traditional varieties showed increasing returns to scale, however, the returns to scale of the mutant variety were lower compared to that of the traditional variety. Also, the opportunity cost of forgoing the traditional varieties to cultivating the mutant variety was very high making adopted farmers hesitant to continue it cultivation.展开更多
文摘Cassava is one of the three main kinds of potato (cassava, sweet potato and potato)in the world. Starch content in the root tuber of cassava is very rich. According to measurement,starch content of cassava is higher than sweet potato by 70%, higher than potato by 155% andthus is a good food and fodder and can be made as noodles,cakes and biscuits. Moreover, cassava is also very useful in industries. Cassava is mainly applied to size and weave cloth in cotton milland textile mill and is an important export material.The adaptability of cassava is broad,it possesses the characteristics of drought-enduranceand poor-nutrient-enduranec. Baize is situated in Guizhou-Yunnan plateau where mountainsare high and slopes are broad.To plant cassava in large area in such region will be a good way forthe exploitation of poor moutainous region.However, in recent tens years, the cassava species inBaise mountainous region were merely the South Pacific Ocean purple bark species. Because of thelong time planting, the species tend to degenerate and the starch content rate decreases.In orderto popularize the four new species of cassava, the aUthors investigated and studied the growthadaptability, the root tuber output and quality of such four species. In 1996. the field test of thefour new species of cassava had been carried out. After the test, good results had been obtainedand the conclusion report is as follows:
文摘The importance of agricultural innovations for raising the living standards of farmers has received substantial attention from the economic and political communities. In Ghana, cassava serves as an important source of calorie and cash crop. Production constraints such as the cassava mosaic disease caused by virus have limit farmers access to productivity potentials and marketing. Breeding efforts attempting to address this constraints have had some success such as the mutant Tech Bankye virus resistant variety. This research, therefore, analysed the impact of some production input on mutant cassava productivity growth in Ghana with the use of Cobb-Douglas production function. Results show that farmers cultivate the mutant variety in addition to other traditional varieties to averse risking in marketing and income. The average cost of production of the mutant variety is higher compared to that of the traditional variety. Eighty percent of the farmers complained difficulty in accessing market for the mutant variety because it could not replace the traditional variety in terms of its texture for the local native ＂fufu＂ production and ＂ampesi＂ and also deteriorate quickly in storage. However, for industrial production of ＂gari＂ and starch, the mutant is the best. Both the mutant cassava and the traditional varieties showed increasing returns to scale, however, the returns to scale of the mutant variety were lower compared to that of the traditional variety. Also, the opportunity cost of forgoing the traditional varieties to cultivating the mutant variety was very high making adopted farmers hesitant to continue it cultivation.
