scholarly journals Farm Work Systems for Crop Rotation on Dried Paddy Field in Snowy Area

1989 ◽  
Vol 24 (1) ◽  
pp. 10-17
Author(s):  
Kazuhiko KURATA ◽  
Oritaro ENDO ◽  
Michiaki ITO ◽  
Kazuhiro NAKANO ◽  
Takashi NAGAI ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Paddy Field ◽  
Work Systems ◽  
Farm Work

scholarly journals Farm work systems for crop rotation on dried paddy field in snowy area. II. The case study on the mechanization and its utilization efficency for crop rtation on dried paddy field.

1989 ◽  
Vol 24 (2) ◽  
pp. 114-125
Author(s):  
Shizunori TAKAYAMA ◽  
Oritaro ENDO ◽  
Kazuhiko KURATA ◽  
Michiaki ITO ◽  
Kazuhiro NAKANO ◽  
...  
Keyword(s):  
Crop Rotation ◽  
Paddy Field ◽  
Work Systems ◽  
Farm Work

R.M.R. Values of Mechanized Farm Work on Paddy Field

1972 ◽  
Vol 1972 (15) ◽  
pp. 42-47
Author(s):  
Tosio NAITO ◽  
Michihiro NAKAJIMA
Keyword(s):  
Paddy Field ◽  
Farm Work

scholarly journals Nitrogen and phosphorus effluent loads from a paddy-field district adopting collective crop rotation

2012 ◽  
Vol 66 (5) ◽  
pp. 1074-1080 ◽  
Author(s):  
T. Hama ◽  
T. Aoki ◽  
K. Osuga ◽  
S. Sugiyama ◽  
D. Iwasaki
Keyword(s):  
Crop Rotation ◽  
Paddy Field ◽  
Surface Runoff ◽  
Paddy Rice ◽  
Rice Crop ◽  
Nutrient Load ◽  
Nitrogen And Phosphorus ◽  
Investigation Period ◽  
Rotation Crops

Japanese paddy rice systems commonly adopt the rotation of vegetables, wheat and soybeans with paddy rice. Crop rotation may, however, increase the nutrient load in effluent discharged from the district because more fertilizer is applied to the rotation crops than is applied to paddy crops. We investigated a paddy-field district subject to collective crop rotation and quantified the annual nutrient load of effluent from the district in three consecutive years. The total annual exports of nitrogen and phosphorus over the investigation period ranged from 30.3 to 40.6 kg N ha–1 and 2.62 to 3.13 kg P ha–1. The results suggest that rotation cropping increases the effluent nutrient load because applied fertilizer is converted to nitrate, and surface runoff is increased due to the absence of shuttering boards at the field outlets.

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