I088 AGRICULTURAL BOTANY, CHEMISTRY AND PHYSIOLOGY OF PLANTS 



AGRICULTURAL 



BOTANY. 



, .CHEMISTRY 



AND 



PHYSIOLOGY 



OF PLANTS. 



ivel}^ [oats, peas and mustard ; 2) in the open field planted with oats. The 

 hnmogen u.^ed was of the chemical composition shown in the following 

 Table. 



Chemical composition of the humogen. 



Dry sample Wet sample 



Water 51-49 % 74-42% 



Organic substances 25.66 22.30 



Mineral substances 22.85 3.28 



100.00 100.00 



Total nitrogen i-49 % i-38 % 



Nitrogen soluble in water 0.08 0.48 



In the pot experiments, in accordance with the instructions of Prof. 

 BOTTOMLEY, bacterised peat was used at the rate of i part to 9 or ig parts 

 of soil, i. e. 89.4 or 44.7 tons per hectare, and the equivalent of nitrate of 

 soda used for moist Immogene was in the proportion of 20.9 or 10.4 cwt. 

 per acre. 



The results of the pot experiments demonstrate that under the condi- 

 tions existing when plants are grown under glass are regularly watered and 

 looked after, a good dressing with humogen may produce a considerable 

 development of the green parts, and consequently promote the growth of 

 green forage plants, but it has no advantageotis effect on seed production. 

 Under the natural conditions of growth in the open field it was not possible 

 in ordinary crops to detect any advantage resulting from the use of humo- 

 gen in quantities suitable for the practical farmer, or at the rate of 5 cwt. 

 per acre (i). 



847 - Growth of the Root System oi Medicago sativa. — Shistovskij, in IO.hvho- 



Fi/ccKiin Ce.tbrh'O-Xo.TfiurmeeHHaR rascma (The Agricultural Gazette of Southern 

 Russia), Year XVII, No. 30, pp. 6-7. Kharkov, August 1915. 



The following experiments were carried out by the Plant- Breeding 

 Section of the Regional Agricultural Experiment Station of Kharkov, the 

 object being to study of the growth of the root system of Medicago sativa in 

 its different phases of vegetation. 



Lucerne from a farm in the j^rovince of Ekaterinoslav was sown in 12 

 Rotmistrov boxes placed in the ground without any cover and filled with 

 soil from a lucerne field of the Station. Sowing was carried otit on the 21st 

 April, with ungerminated seeds, at the rate of 10-20 to each box. On the 

 2-3 May, all the plants except one were removed from each vessel. For some 

 time, namely until the plants had grown robust, they were watered everyday; 

 they were then allowed to grow under natural conditions, with only oc- 

 casional watering, once or twice a week. 



The roots were separated by washing with water six times, namely 

 when the plant had reached the age of i, 2, 2 14, 3, 3 V2 ^^^^ 4 rtTi^^nths ; for 



(i) Sec this litdlctin, May 191 6, No. 497. 



{Ed.) 



