Global ETD Search
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Showing 1 to 6 of 6 for “"Bray-1"”.
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Predicting Maize Yield, Nutrient Concentration and Uptake in P and K Fertilized Soils: Pressurized Hot Water and Other Alternatives to Mehlich I Extraction in Guatemala Soils
… are available but are relatively untested [Bray 1, Mehlich III, Olsen and pressurized hot water (PHW)]. Pressurized hot water is relatively simple and inexpensive, but is not yet tested against other extraction methods under variable P or potassium (K) fertilization levels. To determine …
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Relationships of soil test phosphorus with soil properties and phosphorus forms
… by the four widely used soil extractants, i.e., Bray 1, Mehlich 1, Mehlich 3, and Olsen, represented less than 25 percent of the total P content in 43 Virginia soils from the Coastal Plain, Piedmont, and Ridge and Valley regions. Correlation between Bray 1 (1 minute and 5-minute shaking), Mehlich …
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Liquid swine manure as a phosphorus source for corn-soybean rotation
… soil P measured with three routine soil-P tests (Bray-1 P, Olsen, and Mehlich 3 P), and two environmental tests (Iron-oxide and Water extraction). The second study used a strip-trial methodology using precision agriculture technologies and its objective was to compare three statistical methods …
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Plant and soil effects from the surface application of poultry litter to unmanaged pasture
… Dystrochrepts) by the Mehlich 3 (M3) and Bray 1 (Bl) soil tests. Dry matter yields increased curvilinearly with rate of PL application. This yield increase was attributed to correction of N deficiency in pasture by the PL application. Lower levels of PL increased forage yields in 1992 …
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Nitrophosphate as an alternative phosphate fertiliser for acidic sandy soils
… from a commercial farm in Bothaville with a low Bray-1 P (15 mg kg-1), S (13 mg kg-1), ammonium acetate extractable Ca (79 mg kg-1) content and 5% clay. Results from the study indicated that the pH of soils treated with MAP(33) was higher than the pH of soils treated with nitrophosphate. The …
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Effects of extraction time and phosphorus speciation on soil test phosphorus (STP) in Illinois agricultural soils
The student, Anthony Miller, submitted this Thesis for approval on 2017-03-27 at 11:16.