the top six inches before sowing the seed. -In addition, in- 
corporate a fertiliser with an organic base at two ounces to 
_ the square yard. Wood ashes may be used in addition, if 
available, at four ounces to the square yard, 
Finally apply ground limestone to the surface of the ground 
at four to five ounces to the square yard where most flower 
crops and peas, beans, the cabbage family, radishes and 
turnips are to be grown. Lime is not necessary for potatoes, 
parsnips, beetroot and other root crops unless the ground 
is known to be very acid, and then a light dressing at two 
to three ounces per square yard may be necessary. Lime 
washes or works into the ground so quickly that it is never 
advisable to dig it in. Remember also that strawberries 
dislike lime, and need an acid soil for proper growth and 
development. 
(b) Sun 
P.M.Gs. can trap the sun’s rays as it 
were and ‘‘bottle them up’’ for the plants 
but they cannot manufacture them. A 
- sunny position, therefore, ensures the 
maximum results from P.M.Gs. Early in 
the Spring and late in the Summer the 
rows are at their best running East and 
West, because they catch the last of the 
sun’s rays and the earliest, too. 
(c) Soil warming 
Seeds often fail to germinate properly 
in the Spring because the soil is too cold. 
- When P.M.Gs. are put into position 14 days or so before 
seed sowing, the soil is warmed and the seeds thus grow 
perfectly. This is a point of vital importance to northern or 
midwestern gardeners, for by the use of P.M.Gs, it is possible 
for you to grow first class high quality crops of such items 
as sweet corn, musk melons and tomatoes far beyond the 
point at which this is possible without protection. Growers 
in Canada are now using P.M.Gs. to raise sweet corn well 
up into Ontario, and then follow this crop by using the same 
P.M.Gs. to finish off late crops of either tomatoes or melons. 
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