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... The results obtained by the study of these two methods with barley may be summarized as follows: The material used in this study consists of two varieties of barley known as New Zealand and Berkeley, respectively. Each variety consists of thirty pure lines of ten plants each, or three humdred plants in all. A comparison of the constants for the five characters when determined by using the average ...
... Of the 28 samples taken on 12 different dates at Huntley the average loss in weight was 76.5 percent of the green weight. Of the 30 samples taken on 10 different dates at Fallon, the average loss in weight was exactly the same as at Huntley. The highest loss was 81.6 percent at Fallon and 80.6 percent at Huntley; the lowest at Fallon was 71.7 percent and at Huntley 70.0 percent; the extreme range ...
... The dry-farm soils of Utah are remarkably well supplied with calcium carbonate, thus rendering the addition of this substance unnecessary even in the very remote future. The results of the study reported herein, together with those previously reported, do not show any such marked decrease in the nitrogen and humus supply of the surface cultivated dry-farm soils, as has been found by previous inves ...
... Soils derived mainly from volcanic ejecta can be recognized generally by the presence of glass particles, when such particles occur in noticeable quantity. From the data here presented, it appears that the soils examined fall into three general classes: (a) Very silicious soils containing large proportions of isotropic material of low refractive index and associated with comparatively large propor ...
farming systems; experimental design; least squares
Abstract:
... The estimation of the probable errors of a large number of small duplicate plats well distributed in the area devoted to a field experiment indicates that the precision of agricultural experiments can be increased by replicating the experiments on small plats. Replication is urged not only for giving greater precision in experiments in which the results justify the increased labor, but also for fu ...
... The problem of the water requirements of crops is very important. The factors which are commonly considered to influence water requirements of crops are many, but the most of them are speculative and but few empirical. The interest in this subject is new and consequently not much investigation has been made. The above-described experiments were carried on with the view of ascertaining more in deta ...
Triticum aestivum; Avena sativa; wheat flour; oats; food composition; chemical constituents of plants
Abstract:
... The wheat grown in mixtures with oats did not vary in composition and quality from that grown alone. The flour milled from such wheat contained practically the same percentage of crude protein and gluten, and exhibits nearly the same baking strength. The slight variations in these properties which were found, are no greater than were found in duplicate samples from adjacent plots of wheat treated ...
crops; roots; culture media; dry matter accumulation; soil water content
Abstract:
... A report is given of some of the important literature on the factors affecting the ratio of the tops of plants to roots. It was shown that with wheat seedlings growing in soil extracts the green weight, dry weight and length of roots was proportionately greater in the dilute than in the concentrated soil extract. Corn, wheat and peas growing a number of weeks in sand containing different amounts o ...
... At the Dickinson substation in North Dakota two-row hulled varieties of barley have produced larger yields than the other groups. Some of the data obtained on three groups of barley, the two-row hulled nodding bearded group, six-row hulled bearded group and the six-row naked hooded group in both plat and nursery trials are presented in this paper. An eight-year test, in field plats, of three varie ...