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Paddy field rice can conserve N in the soil under flooded conditions. However, residual soil N represents a potential environment concern when fields are no longer flooded. Winter annual grass cover c...
Land consolidation involving the joining of small paddy fields to form a large-size field has been promoted recently in Japan in order to increase the efficiency of rice production. However, the varia...
Labor-saving for fertilization has been strongly desired due to the shortage in labor and increasing scale of farming for rice cultivation. In order to clear these problems, the effect of application ...
The juvenile phase and photoperiodic sensitivity of 13 Japanese paddy rice varieties were investigated. The duration of juvenile phase was determined by counting the days of insensitivity to a short-d...
Emergence and establishment of seedling of paddy rice sown into flooded soil are poor but promoted when seeds are coated with O2 generator CaO2. It has been commonly understood that this is because C...
The present study was conducted to develop the basal fertilizer application methods which mitigate the damage due to cool weather at booting stage by investigating the relationships between the change...
Varietal difference of lodging resistance in paddy rice was studied using nine Japanese cultivars and thirteen foreign cultivars (cv. Kamenoo : KA, Aikoku : AK, Koshihikari : KO, Dobashi 1 : DO, Fujim...
Although seedling emergence and establishment is inhibited by soil reduction in the direct sowing of paddy rice into puddled and leveled soil, the reasons for this are not clearly understood. This exp...
The present investigation was undertaken to examine which physical and chemical characteristics of the culm associated with lodging resistance changed under different growth conditions using three var...
We investigated which cell wall components of the culm affect the bending stress of the culm using seven rice cultivars. A small difference in the cell wall composition was noticed among the cultivars...
To clarify lodging resistance of high yield examples, characters related to lodging of Shan You 63 (F1 hybrid rice) with 965 gm-2 of a brown rice weight were analyzed. There were various factors for e...
Analysis of the characteristics of grain production of 965 gm-2 obtained by Shan You 63 (F1 hybrid rice) in 1991 was carried out Absorption of nitrogen reached 21 gm-2 up to the time of heading, and a...
For the purpose of improving the deep irrigation method as a countermeasure of floral impotency due to cool weather by means of a reduction of the necessary water depth to protect young panicles, stu...
Chanenges to the Direct Sowing System of Paddy Rice Production in Hokkaido.

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