J . agric . Engng Res . (1996) 63 , 251 – 260 Improvement of Planosol Solum : Part 1 , Experimental Equipment , Methods and Preliminary Soil Bin Experiments with Ploughs K . Araya ; * M . Kudoh ; * D . Zhao ; F . Liu ; H . Jia *Environmental Science Laboratory , Senshu University , Bibai , Hokkaido 079-01 , Japan Heijian Agricultural Research Institute , Jiamusi , Heilongjiang , People’s Republic of China ( Recei y ed 1 0 April 1 9 9 5 ; ...

J . agric . Engng Res . (1996) 65 , 143 – 149 Improvement of Planosol Solum : Part 5 , Soil Bin Experiments with a Three-stage Subsoil Mixing Plough K . Araya ; * M . Kudoh ; * D . Zhao ; F . Liu ; H . Jia * Environmental Science Laboratory , Senshu University , Bibai , Hokkaido 079 – 01 , Japan Hejiang Agricultural Research Institute , Jiamusi , Heilongjiang , P . R . of China ( Recei y ed 2 January 1 9 9 6 ; accepted in re y ised f...

improvement of planosol solum part 3, optimization of design of drop-down ploughs in soil bin

Improvement of Planosol Solum Part 2, Optimization of Design of Roll-In Ploughs in Soil Bin

Improvement of Planosol Solum

Improvement of Planosol Solum Part 7, Mechanical Properties of Soils

Improvement of Planosol Solum. Part 10 Mixing of Wheat Straw and Corn Stalk into Subsoil

Improvement of Planosol Solum. Part 10 Mixing of Wheat Straw and Corn Stalk into Subsoil

Improvement of an Extremely Hard Soil, Planosol

Improvement of Planosol Solum Part 4, Field Experiments with Prototype Roll-In and Drop-Down