In the poor regions of the world, the food supply from local land is a big challenge for eradicating extreme poverty. Sometimes, the technique employed are a big limitation for the agricultural production in those regions. For example, some local residents did not know how to produce agricultural food with low-cost technique on their land. At that time, the demonstration of the best techniques was very important to encourage local residents to carry out their agricultural activity as efficiently as possible. Such demonstration need to be carried out over a long period to allow them to deliver confidence and promote local residents to carry out the agricultural activity by themselves initiatively.
For this point, the arid-agricultural team of Lanzhou University (China) carried out field demonstration in Kenya and other African over many years to make sure that plastic film mulch-cropping technique is employed as a low cost, high yielding technique in dry areas.
After that, more and more local residents joined in employing this agricultural model to produce more food from local farmland, leading to an increasing food supply and more people working productively in agriculture (reducing habitual loafers for social stability).
I appeal to international organization to encourage more activities like those that the demonstration carried out in Africa, to encourage local resident to do the farmland work for effective, cost efficient production.
Some more information is from:
http://www.chinatoday.com.cn/english/society/2015-12/02/content_709109.htm
Prof. Zhanhuan Shang