Author: R. P. White
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 14
Book Description
Phosphorus and Potassium Fertilizers Affect Soil Test Levels
Author: R. P. White
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 14
Book Description
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 14
Book Description
Soil Testing and Plant Analysis
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Selecting Fertilizers
Author: Albert Ronald Merz
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 24
Book Description
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 24
Book Description
Improving Potassium Recommendations for Agricultural Crops
Author: T. Scott Murrell
Publisher: Springer
ISBN: 9783030591991
Category : Agriculture
Languages : en
Pages : 476
Book Description
This open access book highlights concepts discussed at two international conferences that brought together world-renowned scientists to advance the science of potassium (K) recommendations for crops. There was general agreement that the potassium recommendations currently in general use are oversimplified, outdated, and jeopardize soil, plant, and human health. Accordingly, this book puts forward a significantly expanded K cycle that more accurately depicts K inputs, losses and transformations in soils. This new cycle serves as both the conceptual basis for the scientific discussions in this book and a framework upon which to build future improvements. Previously used approaches are critically reviewed and assessed, not only for their relevance to future enhancements, but also for their use as metrics of sustainability. An initial effort is made to link K nutrition in crops and K nutrition in humans. The book offers an invaluable asset for graduate students, educators, industry scientists, data scientists, and advanced agronomists.
Publisher: Springer
ISBN: 9783030591991
Category : Agriculture
Languages : en
Pages : 476
Book Description
This open access book highlights concepts discussed at two international conferences that brought together world-renowned scientists to advance the science of potassium (K) recommendations for crops. There was general agreement that the potassium recommendations currently in general use are oversimplified, outdated, and jeopardize soil, plant, and human health. Accordingly, this book puts forward a significantly expanded K cycle that more accurately depicts K inputs, losses and transformations in soils. This new cycle serves as both the conceptual basis for the scientific discussions in this book and a framework upon which to build future improvements. Previously used approaches are critically reviewed and assessed, not only for their relevance to future enhancements, but also for their use as metrics of sustainability. An initial effort is made to link K nutrition in crops and K nutrition in humans. The book offers an invaluable asset for graduate students, educators, industry scientists, data scientists, and advanced agronomists.
Soil Testing and Plant Analysis for Fertilizer Recommendations
Author:
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 80
Book Description
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 80
Book Description
Validation of Soil-test-based Phosphorus and Potassium Fertilizer Recommendations for Rice and Soybean
Author: Matthew Scott Fryer
Publisher:
ISBN: 9781339299709
Category : Fertilizers
Languages : en
Pages : 234
Book Description
The science of soil-testing for nutrient management and fertilizer recommendations is widely accepted among scientists and agronomists. Although this science is unsurpassed in predicting soil nutrient availability, soil-test interpretations are seldom validated. Major research objectives for irrigated soybean [Glycine max (L.) Merr.] and direct-seeded, delayed-flood rice (Oryza sativa L.) were to: i) validate the accuracy of Mehlich-3 soil-test P (STP) and K (STK) interpretations and ii) published critical tissue-P and -K interpretations in predicting the yield response to fertilizer at different significance levels (p≤0.05 to 0.25), iii) examine how seed nutrient concentrations are influenced by fertilization and crop response to fertilizer, and iv) evaluate how soil samples from two different depths (0-10 and 0-30 or -45 cm) influence crop response to fertilization. Seventeen (soybean) and 16 (rice) total field experiments were conducted in 2013 and 2014. Soil-P interpretations showed an overall accuracy of 40 (p≤0.05) to 55% (p≤0.25) for soybean and 35% (p≤0.05 and 0.25) for rice in predicting the yield response to fertilizer. Overall accuracy of STK interpretations regarding yield response predictions was 71 (p≤0.05) to 84% (p≤;0.25) for soybean and 14 (p≤0.25) to 20% (p≤0.05) for rice. Complete evaluation of critical tissue-P (soybean) and -K (rice) concentrations were unfeasible due to the lack of site-years in deficient categories. Rice tissue-P concentrations were 50 (p≤0.05) and 39% (p≤0.25) accurate in predicting the fertilizer effect on yield. Yield response to fertilizer was accurately predicted at 48 (p≤0.05) to 62% (p≤0.25) of the sites by tissue-K concentrations of soybean. Seed nutrient concentrations of soybean were influenced by fertilizer more frequently and to a greater measure compared with rice. Regression analysis of soil nutrient indices of the shallow and deep soil depths for both crops were relatively strong with a slope close to 1.0 suggesting nutrients at deeper depths had minimal effects on the yield response of either. With exception to STP in rice, nutrient concentration interpretations of soil and tissue for both crops and nutrients were affected by the significance level used to evaluate the data. Tissue concentrations were an inferior (soybean) and superior (rice) predictor of crop response to fertilizer.
Publisher:
ISBN: 9781339299709
Category : Fertilizers
Languages : en
Pages : 234
Book Description
The science of soil-testing for nutrient management and fertilizer recommendations is widely accepted among scientists and agronomists. Although this science is unsurpassed in predicting soil nutrient availability, soil-test interpretations are seldom validated. Major research objectives for irrigated soybean [Glycine max (L.) Merr.] and direct-seeded, delayed-flood rice (Oryza sativa L.) were to: i) validate the accuracy of Mehlich-3 soil-test P (STP) and K (STK) interpretations and ii) published critical tissue-P and -K interpretations in predicting the yield response to fertilizer at different significance levels (p≤0.05 to 0.25), iii) examine how seed nutrient concentrations are influenced by fertilization and crop response to fertilizer, and iv) evaluate how soil samples from two different depths (0-10 and 0-30 or -45 cm) influence crop response to fertilization. Seventeen (soybean) and 16 (rice) total field experiments were conducted in 2013 and 2014. Soil-P interpretations showed an overall accuracy of 40 (p≤0.05) to 55% (p≤0.25) for soybean and 35% (p≤0.05 and 0.25) for rice in predicting the yield response to fertilizer. Overall accuracy of STK interpretations regarding yield response predictions was 71 (p≤0.05) to 84% (p≤;0.25) for soybean and 14 (p≤0.25) to 20% (p≤0.05) for rice. Complete evaluation of critical tissue-P (soybean) and -K (rice) concentrations were unfeasible due to the lack of site-years in deficient categories. Rice tissue-P concentrations were 50 (p≤0.05) and 39% (p≤0.25) accurate in predicting the fertilizer effect on yield. Yield response to fertilizer was accurately predicted at 48 (p≤0.05) to 62% (p≤0.25) of the sites by tissue-K concentrations of soybean. Seed nutrient concentrations of soybean were influenced by fertilizer more frequently and to a greater measure compared with rice. Regression analysis of soil nutrient indices of the shallow and deep soil depths for both crops were relatively strong with a slope close to 1.0 suggesting nutrients at deeper depths had minimal effects on the yield response of either. With exception to STP in rice, nutrient concentration interpretations of soil and tissue for both crops and nutrients were affected by the significance level used to evaluate the data. Tissue concentrations were an inferior (soybean) and superior (rice) predictor of crop response to fertilizer.
Phosphorus and Potassium
Author: Carl Harry Mueller
Publisher:
ISBN:
Category : Potatoes
Languages : en
Pages : 160
Book Description
Publisher:
ISBN:
Category : Potatoes
Languages : en
Pages : 160
Book Description
Soil Testing and Plant Analysis for Fertilizer Recommendation
Author: Karl Schneider
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 72
Book Description
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 72
Book Description
Soil and Crop Factors for Fertilizer Recommendations
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 26
Book Description
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 26
Book Description
Soil Fertility Manual
Author:
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 128
Book Description
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 128
Book Description