Affiner votre recherche
Résultats 1-10 de 33
Suggestions and instructions for growing orchids in the home Texte intégral
1957 | 1956
Suggestions and instructions for growing orchids in the home
1957 | 1956
Suggestions and instructions for growing orchids in the home Texte intégral
Clint McDade & Sons. | Henry G. Gilbert Nursery and Seed Trade Catalog Collection. | U.S. Department of Agriculture, National Agricultural Library
Suggestions and instructions for growing orchids in the home
1956
Suggestions and instructions for growing orchids in the home
1955
Verkade's lining out stock and azalea price list, for forcing and growing on for 1957 Texte intégral
1957
Verkade's lining out stock and azalea price list, for forcing and growing on for 1957 Texte intégral
1957
Verkade's lining out stock and azalea price list, for forcing and growing on for 1957
1957
Costs and returns in growing snap beans for processing, central Maine, 1955
1957
Schrumpf, William E. | Pullen, Winston E.
Costs and returns in growing green peas for processing in central Maine, 1955
1957
Schrumpf, William E. | Pullen, Winston E.
Handbook on bulb growing and forcing for bulbous iris, Easter lilies, hyacinths, narcissus, tulips
1957
Gould, Charles J. (Charles Jay)
A comparison of alfalfa hay and wilted alfalfa silage supplemented with additional grain or hay as roughage for growing dairy calves Texte intégral
1957
Thomas, J. C. | Sykes, J. F. | Moore, L. A.
Tillering Studies in Oats. I: Tillering Characteristics of Oat Varieties Texte intégral
1957
Frey, K. J. | Wiggans, S. C.
SynopsisSeveral spring oat varieties were found to have a high tillering capacity, while most winter varieties produced many tillers. The relative tillering capacities of the various spring varieties were similar for different planting rates and growing seasons.
Afficher plus [+] Moins [-]Een vergelijkend ecologisch onderzoek in opstanden van Quercus borealis Michx F. en Quercus robur L. Texte intégral
1957
Smeets, J.G.P.M.
Extensive investigations into the biotic, edaphic and climatic factors of the growth site and timber production figures showed that Quercus borealis Michx.f. was a very useful hardwood species for the Netherlands, especially on well drained but moist sites. The great-adaptability of this species allowed culture also on less rich and drier soils. Q.borealis was less suited for the improvement of rundown soils or for maintenance of better soils. Other trees with a lower C/N quotient of the litter may be grown for this purpose, or be mixed with Q.borealis.Red oak could only be sown in very dense stands and was unsuited for interspersing in other stands, especially if on poor and dry soils. Undersowing in stands of Scots pine was not satisfactory for soil maintenance. It would be useful if the purpose was to grow Q.borealis afterwards. This change must be in good time. Planting of Q . borealis was contrary to its growing requirements and growing qualities. Red oak should only be sown in very dense stands (1200-1500 litre acorns per ha); from the outset selective thinning must be consistently applied in these stands.
Afficher plus [+] Moins [-]