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The non-uniformity of distribution of seeds sown in a row influences their productivity. To analyse and eliminate the causes of non-uniformities, the straight motion of coulters must be separated fr...
In sample survey on field experiment, samples have to be sampled at random in principle, but samples are often taken systematically due to restriction of time, labor and plot area. In order to get inf...
Dry weight of rice plant is an important character for the vegetative diagnosis and growth forcast of this plant. However, it requires a long time and much labor to precisely estimate the dry weight, ...
Leaf area of rice plant is an important character for survey to elucidate its characteristics of dry matter production. However, it requires much time and labor to precisely estimate the leaf area, w...

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