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Pressurized Hot Water: An Alternative Method Of Nutrient Extraction And Subsequent Analysis For Use In Small-Scale Agriculture, Kristy Susanne Crane
Pressurized Hot Water: An Alternative Method Of Nutrient Extraction And Subsequent Analysis For Use In Small-Scale Agriculture, Kristy Susanne Crane
Theses and Dissertations
Soil analysis for small acreage farms in developing countries is often inconvenient and prohibitively expensive using current procedures, yet the information gained from these soil tests could have economical and environmental benefits. The pressurized hot-water (PHW) extraction coupled with colorimetric or turbidimetric analyses shows promise as an alternative to current procedures. Accepted methods of colorimetric analysis for NO3-N and P exist but an alternative method to atomic absorption spectrometry for K analysis is needed. Of the many possible methods to quantify K, tests performed in the Brigham Young University (BYU) laboratory found sodium tetraphenylborate to be unsatisfactory and sodium cobaltinitrite …
Pressurized Hot Water And Dtpa-Sorbitol, Viable Alternatives For Soil Boron Extraction, Amanda Kathryn Shiffler
Pressurized Hot Water And Dtpa-Sorbitol, Viable Alternatives For Soil Boron Extraction, Amanda Kathryn Shiffler
Theses and Dissertations
Pressurized hot water and DTPA-Sorbitol are two relatively new soil boron (B) extraction methods with potential to replace the cumbersome hot water extraction. The objective of this research is to produce data in support of acceptance or rejection of these two alternative B extractions. The three soil tests were used to extract B from samples of calcareous sand and silt loam and limed, loamy fine sand treated with 10 levels of B and incubated for 7 and 28 d. As B application increased so did extractable B with each extraction method. High correlations (r of 0.977 to 0.999) were observed …