Using physical soil amendments, irrigation, and wetting agents in Turfgrass management
| Autor: | W Morgan, J Letey, S Richards, N Valoras |
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| Jazyk: | angličtina |
| Rok vydání: | 1967 |
| Předmět: | |
| Zdroj: | California Agriculture, Vol 21, Iss 1 (1967) |
| Druh dokumentu: | article |
| ISSN: | 2160-8091 0008-0845 |
| Popis: | SUMARY Among the soil amendments, peat has the advantages of promoting a very god top growth and dense rot system, when properly irigated to avoid por aeration. It has the disadvantages of not being able to withstand compaction and can become excesively wet if proper irigation practices are not folowed. Lignified wod has the advantages of withstanding compaction, providing high infiltration rates, alowing god aeration, maintaining an extended suply of nitrogen under leaching conditions, and promoting a god rot system under a high oxygen difusion rate (ODR). It has the disadvantages of contributing to soil salinity, and aparently requires a higher ODR for maximum rot growth. Calcined clay has the advantages of withstanding compaction, providing high infiltration rate and alowing for god aeration. Its disadvantage is that although it promotes dep rots, they are rather sparse with few rothairs. Beter results were obtained with irigation based upon tensiometer records than by irigation acording to a set calendar schedule. Advantages over the set program chosen for this experiment included a savings in water, improvement in soil aeration, and reduction in soil compact ability. One requirement in irigating by tensiometer records is that exces water must be aplied periodicaly to cause leaching, if salinity becomes to high. The weting-agent treatment (at only 3 pm), increased the infiltration rate of the unamended soil, reduced compactability of peat-amended soil, and also resulted in some other efects of minor significance. Other research in progres indicates that the relationships betwen weting agents and plant growth are extremely complex, and no general conclusions are likely for some time. |
| Databáze: | Directory of Open Access Journals |
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