OCR Text |
Show - ...... m i tm! i. . COnPOSITlON OF S0L. 'ronvy srainrnder"iriidwitiri)oi-dfiirHtn '!1 .r tmililj null underlaid with noil- Mrojis (Siiltsinl U the proper couibiun- tiuu. " " " ' Taking tin great run of soils the 'oiliitt'y ocv phosphorus, citldinii and iimiHia are (he ouly materials ueees iu.v to add to tttem. Ciilciuiii Is supplied best In form of (troii ud limestone: phosphorus In the form of baste slag phosphate or phos lihnto rock; the humus by the green manures, grasses and farm manure Here are some of the crop requirements: require-ments: Grains. Nitrogen, phosphorus. Potatoes. Nitrogen. Sugar Beets. Nitrogen, phosphorus, calcium, potassium. Peas, Clover, Alfalfa. Calcium, phosphorus, phos-phorus, potassium. Beaus. Phosphorus, potassium, calcium. cal-cium. Soils which hold moisture do not lack nitrogen. The drier a soli may bo,, as a rule, the greater Is the lack of nitrogen. nitro-gen. Tho dry soil remains poor In humus. In moist spots tho soil Is darker and humus content Increased. The heavy clay soils require a heavier dressing of phosphorus and a lighter dressing of nitrogen, while on the dry soil the reverse Is true. Wet, cold soila are for the moat part poor in potassium. With a few plain principles like these before them farmers ought to be able to gc forward and Increase production on their land 50 to 100 per cent. Plans of crop rotation should bring wheat aftercorn, clover after wheat (one or two "years) and potatoes after clover. Cowpeas, sugar boots, turnips and similar crops ought to have a place in the rotative scheme. |