Modern agriculture, which seeks high output as its sole purpose, depends on new crop varieties developed by modern technology.
This has led to all sorts of problems because every new variety is introduced with a set of standardised or normalised cultivation technologies in which chemical fertilisers and pesticides are indispensable. Not only has modern agriculture brought problems
of food safety and environmental pollution, it has also resulted in problems such as pests and diseases because new varieties are
often unsuited to local climate and environment. In contrast, there
are many advantages in the conservation of traditional crop varieties which can enhance the biodiversity of the farmland, increase
output and guarantee food security. It is also an important factor in the development of ecological agriculture.
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