Results 121 to 130 of about 40,209 (161)
Some of the next articles are maybe not open access.
Soil Science Society of America Journal, 1955
Abstract Two experiments were designed to test the effects of plant species, rates of fertilizer application, and superphosphate‐rock phosphate mixtures on the availability of rock phosphate. Vigo wheat and Kenland red clover were grown for 3 months on Pearman silt loam and the above‐soil‐portion of the plants ...
J. T. Murdock, W. A. Seay
openaire +1 more source
Abstract Two experiments were designed to test the effects of plant species, rates of fertilizer application, and superphosphate‐rock phosphate mixtures on the availability of rock phosphate. Vigo wheat and Kenland red clover were grown for 3 months on Pearman silt loam and the above‐soil‐portion of the plants ...
J. T. Murdock, W. A. Seay
openaire +1 more source
The Petrography of Rock Phosphates
The Journal of Geology, 1950Need for more extensive application of thin-section petrography to study of sediments, especially rock phosphates, is emphasized. The petrographic microscope alone is inadequate for investigation of these rocks, and often it will be necessary for the petrographer to employ X-ray diffraction, qualitative microchemistry, and other special methods.
openaire +1 more source
Fertilizer Research, 1992
The agronomic effectiveness of unground North Carolina phosphate rock (PR) and partially acidulated phosphate rocks (PAPR) prepared by acidulation of the PR with 30%, 40% and 50% of the phosphoric acid needed for complete acidulation, was determined in a 4 year field experiment on permanent pastures. The soil developed from volcanic ash, and was highly
S. S. S. Rajan, J. H. Watkinson
openaire +1 more source
The agronomic effectiveness of unground North Carolina phosphate rock (PR) and partially acidulated phosphate rocks (PAPR) prepared by acidulation of the PR with 30%, 40% and 50% of the phosphoric acid needed for complete acidulation, was determined in a 4 year field experiment on permanent pastures. The soil developed from volcanic ash, and was highly
S. S. S. Rajan, J. H. Watkinson
openaire +1 more source
Rock Phosphate Studies with Neutron Irradiated Rock Phosphate
Soil Science Society of America Journal, 1950Maurice Fried, Arnold J. MacKenzie
openaire +1 more source
Unconventional uranium in China's phosphate rock: Review and outlook
Renewable and Sustainable Energy Reviews, 2021Yanhua Zheng, Bernhard Geissler
exaly