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An investigation of agricultural chemicals and chemical fertilizer used by golf links were carried out from June 1991 to May 1992. Immediately after or during the rainfall, sampling for drainage was s...
From 1991 to 2000, a rice cultivar, Koshihikari, was grown in the field, where either farmyard manure or chemical fertilizer was continuously applied. A minimal amount of herbicide and pesticide were ...
From 1991 to 2000, a rice cultivar Koshihikari was grown in the field, with either farmyard manure or chemical fertilizer continuously applied using a minimum of agricultural chemicals. After six yea...
From 1991 to 1994, a rice cultivar, Koshihikari, was cultured under dense (25 hills/m2) and sparse (17 hills/m2) planting with a low supply of agricultural chemicals and with continuos application of ...

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