SynopsisSoft red winter wheats decreased significantly in test weight, increased significantly in kernel softness, and increased in amount of fine flour produced during milling of samples obtained over a delayed harvest period of about 45 days. Protein and ash percentages were unchanged. Small changes occurred in flour viscosities, dough miring characteristics and in cookie size and top grain.

SynopsisThe effect of temperature during the wheat fruiting period on dough mixing time and loaf volume of bread was studied graphically and statistically for 513 samples of bard winter and spring wheat varieties grown under a wide range of climatic and soil conditions. Loaf volume and mixing time decreased, in general, with increasing accumulated degrees F. above 90 during the last 15 days of die fruiting period.

SynopsisTwo varieties of spring wheat, Chinese and White Federation 38, flower earlier as the daylength increases, the former variety being much less sensitive to changes in photoperiod and temperature than the latter. Chinese was earlier under cool-temperature, short-day conditions, and White Federation 38 was earlier in a long-day, warm-temperature environment.

SynopsisApplication of microtechnics to wheat quality evaluation provides a means for obtaining the following information on as little as 100 g. of sample: moisture, protein, ash, 1,000 kernel weight, flour yield, dough development characteristics, absorption, and loaf volume. Microtechnics can have wide application for wheat breeders by providing quality information on early generations of hybrid populations.

SynopsisRain and sunshine had large opposite effects on the fermentation of wheat meal of 3 varieties of soft red winter wheat during a delayed harvest period of 46 days. The hypothesis is offered that these effects are the result of an activation by rain and the inactivation by sunshine of glutathione or other sulfhydryl compounds.

The effects of cropping systems and soil treatments on the nitrogen and organic carbon contents of Geary silt loam were studied in 1915, 1923, 1934, 1946, and in 1956 on the Agronomy Farm at Manhattan, Kansas. Losses of nitrogen and organic carbon were largest where the original contents of these constituents were highest. Losses were most rapid in the earlier years of the study. Largest losses occurred under a 3-year rotation of corn, soybeans (for hay), wheat. Losses tended to be lower in the continuous wheat plots than in plots under rotations including row crops and legumes in addition to wheat. Differences between losses of nitrogen and organic carbon under the different fertility treatments were small. However, losses were greatest under phosphate, and phosphate and potash treatments, and were smallest under the complete fertilizer treatment. Although alfalfa increased the nitrogen content of the subsoil slightly, the other crops in the rotation reduced it so that the rotation studied did not appreciably change the subsoil nitrogen content.

v | Kirjasto Aj-k | The influence of sowing time on the cultivation of winter rye and winter wheat in south Finland