—Lancaster Farming, Friday, Nov. 29, 1957 16 Winter Cover Crops Help Maintain Soil Structure by Insulating Winter cover crops that reclaim lost plant nutrients, provide or game matter, and prevent ero sion can also play an important ■role in maintaining granular soil •structure, the U.S. Department of Agriculture says. Soil-management specialists at USDA’s Agricultural Research Center, Beltsville, Md., have found that cover crops planted early in the fall insulate the soil and prevent damage to soil struc ture by repeated freezing and (/* UJ Ul S </* UJ to UUI 3 thawing, Recommended cover crops in clude rye and other cereals, rye grass, annual bromegrass, vetch, and crimson clover. They may be used singly or in combination, de pending on local conditions. Although repeated freezing and thawing during the winter may improve soil by breaking up clods, these forces are frequently detrimental to soil-aggregate structure (clustering of fine soil particles) under certain field con I' » 4 u? 4 Sensational I YEAR-END SALE on NEW and USED farm equipment J®) I-S >‘ ir r *•<# !‘K ; r r / *• | SEffSATIOWAi., I . Year“Enti 1 " Ip . .-Used Equipment ✓ >;• f /" >*■ f Pocket Profitsi j y ? 1 Trade.Today • • .Up to 4 Years to Pay Your old equipment is worth more now than it ever will be worth again. Trade sow, without any interest or carrying charge before next work season. Take anywhere up to four crop years for pay- 1 ments with our special payment plan. JARED STAUFFER MARTINDALE, PA. A. L. HERR & BRO. QUARRYVILLE, PA. LITITZ PA HERR’S IMPLEMENT STORE ARTHUR S. YOUNG CO. WEST WILLOW, PA. KINZERS, PA, s.' XT' / X SPECTACULAR pavings s BRAND NEW and USED Equipment V *■» * S \ ■V.'v S v^w* ■’■ “ V- to ***%&& ■ * < w V > >/- *\ - ,V • * < ..._K x \ YOU s ditions. s The researchers point out that the protective insulation provided by vegetation reduces the number of times a soil freezes during the winter and the depth to which frost penetrates. Cover crops also promote and help to maintain large populations of earthworms and other earth-boring organisms, which increase infiltration and speed up drainage of excess wa ter from the surface soil. Laboratory and field tests at "■V, .T~ ~ ~ "/T V '-'/ 4 ‘ *, *' ? V /<* * > < ' . j N V*- * *•» /•••• Now you can buy new Case tractors, implements and ma chines at a big slash in price. We simply have to dear our floors for new 1958 shipments coming in soon. You get a ; double saving because 1958 prices are bound to be higher to meet increased costs for labor and materials. Come in now, before these amazing bargains are gone. Price tags are marked way down on used machines, too. We need the space for a flood of trade-ins from this red hot sale. You’ll be bowled over by the deals you can make in used equipment, both Case and other makes. This is the chance of the year to pick up serviceable items at pin money prices. Look over these values before they are snapped up by other smart buyers. * ■* See Your Local Case Dealer Today Beltsville indicate that break down of soil aggregates is a major problem at wet soils where freez ing and thawing takes place sev eral times during the winter months. This is a particularly common occurrence in the Mid dle Atlantic States. Freezing and thawing on un protected fields causes slumping of the soil granules when they be come wet. This condition leads to surface puddling, followed by crusting and cracking as the soil dries out in the spring if' I'x > ~* t Ji » *r ~| ifllT* , . - <> - A \ > s x S' s * t * KAYLOR BROS. RHEEMS, PA. WALTER BINKLEY & In other trials conducted by USDA researchers, different methods of tillage and replace ment of crop residues resulting in varying rates of soil deterioration in corn plots fomerly in sod. Corn was grown each year with a winter cover crop of rye or vetch. Tillage variations included plowing, plow-depth tillage with sweeps, and a mulch-till “once over” planter. Residues were chopped and disked and either turned under or left on the sur face. n %s* PTB 3> m A K (/) m I/) SON
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