The cotton plant in Egypt, studies in physiology and genetics . March 30th. 20c. /\ ---K^ 10° c. 2C10 )° / ^.b^ ^^^-<^^ March 31st \ ^^^— 20° / ^^^^^^ April Jst i ~~~~~~~ 10° Night 6 Noon a. Seed sou/n b. IrrigatedWeather normal 6 Night Fi(i. 29.^Temperatitre of the Seed Bed. Recoidecl by thermo-electric junction placed 5 cm. below surface onsouth side of rids;e. the weather, from the end of February until May. Thehabit of sowing on ridges running east and west secures ahigher soil-temperature on the south face. The tempera-ture of the seed bed before, during, and after optimumsow
The cotton plant in Egypt, studies in physiology and genetics . March 30th. 20c. /\ ---K^ 10° c. 2C10 )° / ^.b^ ^^^-<^^ March 31st \ ^^^— 20° / ^^^^^^ April Jst i ~~~~~~~ 10° Night 6 Noon a. Seed sou/n b. IrrigatedWeather normal 6 Night Fi(i. 29.^Temperatitre of the Seed Bed. Recoidecl by thermo-electric junction placed 5 cm. below surface onsouth side of rids;e. the weather, from the end of February until May. Thehabit of sowing on ridges running east and west secures ahigher soil-temperature on the south face. The tempera-ture of the seed bed before, during, and after optimumsowing-time was recorded electrically in 1911 (Fig. :29);the sudden rise shown at the moment of sowing (a) is dueto the scorched surface soil which fell into the hole,showing how effective is the heat insulation of dry soil,since the depth of the hole was only 4 cm. The heatabsorptivity and conductivity of the soil after irrigation {h) i6 THE COTTON PLANT IN EGYPT chap. 70 C. g — 60C. 5 g. 50°C. 5 ^l 40° C. Q, to 30° C. S = 20°C. f^ ^ 10 c. 2 g 10i». Mean Growth per day on Ten Afifi Plants, (main axis)
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Keywords: ., bookcentury1900, bookdecade1910, bookidcottonplanti, bookyear1912
