. Plant propagation; greenhouse and nursery practice. plant a weaker solution (1 part to 500) is recommended. According tf) another source, damping-off may be prevented bytreating the soil with dilute iron or copper sulphate. 81. Pricking out (or off) is a ga/deners term for trans-planting- seedlings while yet so small they can easily belifted on a stick scarcely wider than a toothpick at itssharpened end. A better form consists of two pointswhich form a blttnt V. The seedlings are thus movedfrom the seed pans and placed in other flats at greaterdistances apart, say an inch, until better roote
. Plant propagation; greenhouse and nursery practice. plant a weaker solution (1 part to 500) is recommended. According tf) another source, damping-off may be prevented bytreating the soil with dilute iron or copper sulphate. 81. Pricking out (or off) is a ga/deners term for trans-planting- seedlings while yet so small they can easily belifted on a stick scarcely wider than a toothpick at itssharpened end. A better form consists of two pointswhich form a blttnt V. The seedlings are thus movedfrom the seed pans and placed in other flats at greaterdistances apart, say an inch, until better rooted. Prick-ing out is done also to avoid risk of damping-off (78). CHAPTER VPOTTING 82. Potting, placing of rooted plants in flower pots. 83. Potting soil should be light and friable so as tohandle easily, drain readily and withstand crusting andbaking after wetting. It should also be fertile in pro-portion to the needs of the plants to be grown in it—rich for some, poor for others. Also its friability mustvary; for ferns l)e looser than ftn FIG. 44—POTTING SOIL MIXED AND UNDER COVER This soil has been passed through a machine mixer and is sifted, also bymachine, ready for use. 84. Preparing an ideal soil for potting. The best gen-eral potting soil is made as follows: In spring aftergrass has begun to grow well, remove sod from an oldblue grass pasture or greenhouse sodding field wherethe soil itself is rich and deep. For convenience in han-dling, cut the sod in strips a foot or so wide, three inchesthick and as long as can be easily handled either in rec-tangles or in rolls, the latter perhaps preferred. Place thesods close together on the ground in a layer, grass side 54 pen rINC, 55 down, oil a well-drained space adjacent to the grccnhonse.(Mincniciit widths are (3 to 10 feet. On this layer placetwii nr three inches of well-rotted manure and sprinklepuheri/ed lime tui it—say, a scant ])ailful to the s(|uarerod Ivejieat alternate layers of sod and manure until al)
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