The methods to utilize the liquid-preserved acetic acid bacteria during yielding vinegar were established,and the main factors affecting its acid yield were studied in this paper.

Analysis on growth characters and production levels of two species of naked oat (Avena nuda) in Henan Province

In light of the production practice of Nanjing Changjiang tunnel shield segments,this paper elaborates in detail the concept and methods of creative management,from the perspectives of production resource allocation,regulations and rules stipulation,production process control,production level,and team building.

The ceramic proppant fracturing(CPF)pre-test for improving stabilized production of Low Cretaceous Yanchang group in Changqing oil-district--the effect evaluation;

Chlorophyll content of three rice varieties with different yield levels were studied in this experiment.

Based on the results from Shandong Sweet potato Regional Trials, unitizing Xu Shu 18 yield level, two quotas of environment effection on yield were estimated.

According to the actual situations of Xishan Mining Area including the geological conditions and technical equipments, this paper analyzes all factors influencing the increase of unit-yield level of Xishan Mining Area, and advances some suggestions on increasing the unit-yield level.