However, questions such as"Is corn a plant indigenous to China or an introduced crop?","How about its cultivation history on native land"and "When and how was it introduced into China?" have hitherto no recognized answers and remain a subject for further investigation.

Design and development of waste-cotton nonwoven substrate for soilless culture;

Adaptive fuzzy control system of circulating nutrient solution system in soilless culture;

Study on substrates mixed mainly with agricultural wasted staff in soilless culture of tomato;

Determination of Microelements in Tea and Its Cultivating Soil by Microwave Digestion-Atomic Absorption Spectrometry;

Studies on seed germination and soilless cultivation of Schizonepeta tenuifolia;

On the application of soilless cultivation of orchids in scientific and technological activities for middle school youngsters;

Purification of Liwahe creek which belonged to a eutrophic water body was studied by means of soilless cultivation techniques on artificial substratum from may, 1992 to March, 1998.

Effects of Nutrient Conditions on Yield and Quality of Hydroponics Pumpkin;

The confection of the nutritious liquid is a important technical problem in the hydroponics .

Pot experiments were carried out to study the optimal prescription of macroelements in nutrient solution for lettuce hydroponics.