DM 15

DM 15

 

Soil and its Relation to Crop-Production

In order to form soil which is able to absorb manure effectively, it is necessary to neutralize the soil, i.e, -by mixing lime with it. However, if soil liming is excessive, manganese will be depleted and manganese deficiency will occure. As result, the usefulness of the soil may be lost completely. Therefore, when liming, it is important to add only the proper amount for neutralization. Before the application of lime the pH value must be determined-the pH reading indicates its hydrogen ion concentration. To determine this value Takemura’s simpklified pH Tester is recooended-it has been specifically manufactured of making on-site measuremnets.

*pH values suitable for vegetable growth: these are attached to the tester proper

*Amount of calcium carbonate necessary to provide soil with a pH value of 6.5, 10 area and 15 cm indepth.

soil claassification Sandy Loam Clay Peat Usage
pH value of original soil Brown with a small proportion of humus Black with a large proportion of humus Brown with a small proportion of humus Dark brown with a large proportion of humus Deep black with a very large proportion of humus Brown with a small proportion of humus Dark brown with a large proportion of humus Deep black with a very large proportion of humus Determine soil type by its appearance and touch, then measure can then be calculated by referring to the table.
4 250 500 900 1200 1500 1000 1500 1800 2500
4,5 200 400 700 900 1200 800 1100 1300 1800
5 150 300 500 600 800 600 800 900 1200
5,5 100 200 300 400 500 400 500 600 800
6 50 100 150 200 250 200 250 300 400

 

Suitable Crops Moisture Levels

Crop Proper moisture Crop Proper moisture Crop Proper moisture Crop Proper moisture Crop Proper moisture Crop Proper moisture
Iris  3  ̴5 Tulip  3  ̴5 Occidental  2  ̴3 Watermelon  4  ̴6 Pimiento  4  ̴6 Starwberry  4  ̴6
Carnation  3  ̴5 Rose  3  ̴5 Oriental Orchid  1  ̴2 Celery  4  ̴6 Grape  3  ̴5 Pea  3  ̴5
Foliage  3  ̴6 Freesia  1  ̴2 Cucumber  4  ̴6 Tomato  4  ̴6 Melon  3  ̴5    
Chrysanthemum  3  ̴5 Lily  2  ̴3 Potato  3  ̴5 Eggplant  4  ̴6 Lettuce  3  ̴5