Over the three successive crop years, 1931-32, 1932-33 and 1933-34 precision cultivation tests to ascertain the productivity of Norin 10 were carried out.
According to the practice of farmers, the rows were made at a width of 60 cm and seeds were sown at a distance of 13 cm. For this experiment, a field lot with uniform soil condition was selected, and the fertilizer was given for each row equally. A seed plate with holes at a distance of 2 cm was used for making the spacing regular. Two seeds were sown in each hole, and the desired density of stands was maintained by thinning or additional planting. In this way all care was taken for the uniform growth of individual plants.
The flour yield of Norin 1 ( + or - standard variety) in the crop year 1932-33 was 68%, while that of Norin 10 was 72.5%, whereas the amount of wet gluten of the former was 26.8% and that of the latter 28.2%.
6) Character test at the Iwate Agricultural Experiment Station:
a) Adaptibility for conditions of cultivation -
In order to obtain uniformity of soil conditions, the surface soil was first removed, the base soil was leveled, and then the well-mixed surface soil was overlaid evenly. On thus prepared field a conbination of the amount of fertilizer and spacing was designed according to the precision culture micro test method (the purpose of which was mainly to observe reaction towards nutrition and sunlight). The characteristics connected closely to yield were then tested. The following tables show the comparisons of the respective characters between Norin 10 (semi-dwarf type) and Norin 14 (normal type), both being derived from Turkey red x Fultz-Daruma.
Average number of kernels on one spike was 19-28 for Norin 14 (normal type) and 21-31 for Norin 10 (semi-dwarf type), while the 1,000 kernel weight for the former was 31-35.8 g and for the later 24.8-34.6 g, especially Norin 10 in case of much fertilizer and dense planting, the kernel weight became lower due to an outbreak of powdery mildew.