Tdbles 12 dnd 13. Photographed on 7"' August. 

 The Beets depicted on Tables 12 and 13 received a manuring of: 

 2.520 grams Nitrogen (N) in the form of Calcium Nitrate 



0.470 grams Potash (KjO) in the form of Muriate and Sulphate of Potash 



1.065 grams Phosphoric Acid (P2O5) in the form of Mono- Bi - Calcic Phosphate 

 0.400 grams Magnesia (Mg O) in the form of Sulphate of Magnesia 



1.160 grams Calcium Chloride as a means of protecting against heart-rot and dry-rot 

 No. 67 on Table 12 remained without Nematodes 

 No. 72 on Table 13 received an addition of Nematodes. 

 For experiments, such as those at present under consideration, the Nematodes are arti- 

 ficially reared in a mixture of sand and mould, very poor in plant food, and can thus 

 be added to the soil of the culture pot in any desired quantity. The moisture in the 

 soil remained normal until the middle of June but then until harvest became very small. 

 The Nematodes take away part of the nourishment from the beets, so that when there 

 is just sufficient amount of plant food for the beet, and if Nematodes are present, a 

 certain deficiency of nutriment must result, and an already existing deficiency will be in- 

 creased by the effect of the Nematodes. The amount of damage which they cause varies 

 in proportion to the number of nematodes present, also on nourishment of the plant, 

 and on the amount of moisture present in the soil. The infestation with Nematodes 

 being equal on a soil which would have just sufficient nourishment for the beets, if the 

 land was full of Nematodes, the damage done is more extensive in moist soils than in dry. 



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