1. It has great significance for protecting blackland, improving ecological environment, and establishing ecological province.

2. Blackland element with fertility taller and celebrated, but come for years its fertility drops apparently.

3. The utility model relates to a blackland and clay root and stem crop ditch loosening machine for loosening soil.

4. Ceng Yin of advance childe serious side one character is inadvertent affront land and genuflect ground repents, forgive of invocatory blackland ground.

5. Then, fall season, we are crossed jump a few a thousand li to go those your people on this blackland ground swing Campagna of look for tender river the story of gas ileum.

6. Rhizo-box and field cultivation methods were used to study the delpletion and accumulation of organic P in maize rhizosphere on blackland and chernozem.