Experimental Studies of Cultivation of Certain Vegetable Crops ... |
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12 inches 6-inch depth average yield beet plats broken line cabbage carrots celery CHIG RSITY CHIG UNIV UNIVE conserving moisture crop plants cubic centimeters cultivated plats difference in yield drying due to cultivation effects of cultivation effects of weeds evaporation experiments with corn factor FIGURE growing season growth Illinois Agr inches deep increase lateral spread line the scraped loam loss of moisture MICHIG UNIV UNIV milligrams moisture conservation nitrification nutrients onions plats of beets plats plats plats rainfall reached a depth Relation of cultivation represents the cultivated root system roots had reached rows RSITY SITY RSITY UNIV scraped plats SITY UNIVE soil moisture soil mulch soil temperature solid line represents studies surface soil taproot transplanting treatments uncultivated soil UNIV CHIG UNIV UNIV MICHI UNIV UNIV RSITY UNIV UNIV CHIG UNIVE SITY untrained tomatoes vated Scraped Wall Paper weed control weed plats Widtsoe yield of corn
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Page 71 - A modification of Student's table for use in interpreting experimental results.
Page 72 - Bui. 128:1-15. Morgan, JO 1912 The effect of soil moisture and temperature on the availability of plant nutrients in the soil. Amer. Soc. Agron. Proc. 3 (1911): 191-249.
Page 23 - ... Agriculture and the Central Experimental Farms, Canada, which read as follows: It is proposed that there be organized a society for horticultural science, the object of which should be more fully to establish horticulture on a scientific basis. The membership would naturally be made up of the horticulturists of the experiment stations and of the United States Department of Agriculture, together with other scientists whose work has a horticultural bearing. The meetings would be held in connection...
Page 10 - These facts were experimentally proved by the following series of experiments. The bulbs of mercury thermometers were placed one inch above the surface of both the cultivated and uncultivated soils. It was found that the thermometer over the cultivated soil would register at certain days about 10° F higher temperature than that placed over the uncultivated soil.
Page 72 - Stewart, R., and Greaves, JE 1909 A study of the production and movement of nitric nitrogen in an irrigated soil. Utah Agr. Exp. Sta. Bui.
Page 10 - It was found thai the thermometer over the cultivated soil would register at certain days about 10GF higher temperature than that placed over the uncultivated soil. In another experiment the bulbs of the thermometers were placed horizontally over the surface of both soils. It was discovered also in this case that the surface of the cultivated soil would be 7 or 8°P warmer in certain days than that of the uncultivated.
Page 13 - ... OF USE OF LOW-GRADE FERTILIZER. One of the greatest burdens of the fertilizer industry as now organized is the low percentage of plant food in the material which it sells to the farmer. What is recognized in the fertilizer trade to-day as a high-grade fertilizer would contain 4 per cent of nitrogen, 8 per cent of phosphoric acid, and 4 per cent of potash, while 90 per cent of the mixed fertilizer sold to agriculture is of lower grade than this, much of it 2-8-2 or equivalent low grades. This...
Page 1 - Careful studies were made of the root system of the several crops at various stages of growth in order to determine whether or not there is any correlation between the character and distribution of the roots and the response of the plants to cultivation.
Page 17 - I should say that, it was during the latter part of April or the first part of May.
Page 20 - This means that the odds are 399:1 against a difference as great as this being due to chance alone.