Phosphorus in citrus soils: Removal and redistribution of phosphorus from the soil during twenty-eight years of cropping with citrus studied
AuthorsP. F. Pratt
W. W. Jones
Authors AffiliationsP. F. Pratt is Assistant Chemist in the Department of Soils and Plant Nutrition, University of California, Riverside; W. W. Jones is a Horticulturist at the University of California, Riverside.
Hilgardia 10(11):10-10. DOI:10.3733/ca.v010n11p10. November 1956.
Soil samples taken in 1955—from a 38-year-old citrus orchard—were compared with soil samples taken in 1927 when a long-term fertility trial with various fertilizer treatments was started. The main factors known to have influenced yields in the fertility trial are available nitrogen and structural conditions of the soil. The application of phosphorus fertilizers did not influence the yields or the quality of the fruit.
Also in this issue:Lemon industry in California: Economic objectives and operation of state marketing order for lemon products analyzed in terms of its effectiveness
House packing western lettuce: Changing methods of harvesting head lettuce in the Salinas district create problems for operators of packing houses
Reduction of wildfire hazard: Correct timing of prescribed burning of dead vegetation in timber reduces danger of uncontrolled fires in those areas
Gains of two types of lambs: Suffolk cross lambs from whiteface ewes showed slightly faster gains than Corriedale crosses in comparative study
Aqua and anhydrous ammonia: Good sources of nitrogen fertilizers but materials should be placed well away from plants to lessen chance of injury
Nitrate levels for vaiencias: Tree growth improved in soil and solution cultures when nitrogen was maintained at relatively high concentrations
Pest control sprays on oranges: Effects of oil and parathion sprays on orange fruit size and quality. subject of three-year study in southern California
B Vitamin content of avocados: Studies reveal California-grown avocados are in superior group of foods as source of pantothenic acid and vitamin B
Development of the flower and macrogametophyte of Allium cepa
Ontogeny and structure of collenchyma and of vascular tissues in celery petioles
Vessel development in celery