Soil test calibration studies for formulation of phosphorus fertilizer recommendations for maize in Morogoro district, Tanzania. I. evaluation of soil test methods

1998 ◽  
Vol 29 (17-18) ◽  
pp. 2801-2813 ◽  
Author(s):  
D. A. Ussiri ◽  
P. N. S. Mnkeni ◽  
A. F. MacKenzie ◽  
J. M. R. Semoka
Keyword(s):  
Test Methods ◽  
Soil Test ◽  
Phosphorus Fertilizer ◽  
Fertilizer Recommendations

EVALUATION AND CALIBRATION OF PHOSPHORUS SOIL TEST METHODS FOR PREDICTING FERTILIZER REQUIREMENTS OF POTATOES

1957 ◽  
Vol 37 (2) ◽  
pp. 134-142 ◽  
Author(s):  
J. A. Smith ◽  
R. W. Sheard
Keyword(s):  
Soil Phosphorus ◽  
Test Methods ◽  
Soil Test ◽  
Phosphorus Fertilizer ◽  
Southern Ontario ◽  
Phosphorus Response ◽  
Soluble Phosphorus ◽  
Phosphorus Requirement ◽  
Fertilizer Rates

According to concepts and techniques developed by Bray, ten extracting procedures for soil phosphorus were compared and evaluated against phosphorus response collected from field potato trials conducted in various potato-growing areas of Southern Ontario over three years.A modification of the PA2 test, developed by Bray and his associates for the extraction of adsorbed + acid-soluble phosphorus, was chosen as most nearly fulfilling the requirements of a successful soil test under the conditions of this experiment.The soil test was calibrated against response to phosphorus fertilizer rates resulting in a phosphorus requirement table for potatoes.

scholarly journals Refining phosphorus fertilizer recommendations based on buffering capacity of soils from southern Brazil

2021 ◽  
Vol 45 ◽  
Author(s):  
Gilmar Luiz Mumbach ◽  
Luciano Colpo Gatiboni ◽  
Daniel João Dall’Orsoletta ◽  
Djalma Eugenio Schmitt ◽  
Douglas Luiz Grando ◽  
...  
Keyword(s):  
Buffering Capacity ◽  
Southern Brazil ◽  
Phosphorus Fertilizer ◽  
Fertilizer Recommendations

scholarly journals Online Fertilizer Recommendation System (OFRS): A Step Towards Precision Agriculture And Optimized Fertilizer Usage By Smallholder Farmers In Bangladesh

2020 ◽  
Vol 1 (4) ◽  
Author(s):  
M. A. Hossain ◽  
M. N. A. Siddique
Keyword(s):  
Precision Agriculture ◽  
Recommendation System ◽  
Smallholder Farmers ◽  
Fertilizer Application ◽  
Soil Test ◽  
Total Production ◽  
Soil Database ◽  
Fertilizer Recommendation ◽  
Fertilizer Recommendations ◽  
Input Cost

The recent progression and Green Revolution (approx. between the 1990s-2010s) in agriculture of Bangladesh resulted in an increase of total production despite yield-gap to ensure food security. But agriculture in Bangladesh is still backed-up by higher use of inputs (agrochemicals-fertilizers, pesticides; modern varieties, irrigation etc.) and inversion tillage. This conventional agrochemical-based smallholder agriculture may lead to soil and environmental degradation, soil acidification, and a decline in soil fertility. Therefore, it is significant to optimize input application in intensive agriculture, especially fertilizers. This paper introduces the potential online facilities of generating online fertilizer recommendations for smallholder farmers in Bangladesh to ensure proper usage of fertilizers and enable sustainable agricultural production. We also highlighted how the usage of fertilizers increased with an increase in total production over time. But the sustainability of production in the years to come still remain challenging. With the aim of sustainable crop production, reduction in the misuse of fertilizers and reduction of input cost by optimizing the present pattern of excessive fertilizer application, the Soil Resource Development Institute (SRDI) provides location-specific fertilizer recommendation through both the manual and soil test based interpretation of plant nutrients: soil database in Upzazila Nirdeshika and static laboratory soil analysis. Recently, SRDI developed web-based software named Online Fertilizer Recommendation System (OFRS). The system is capable of generating location-specific fertilizer recommendations for selected crops by analyzing the national soil database developed by this governmental institute. The software requires farmer field location, respective soil and land type, and crop type and variety information to generate crop-specific instant fertilizer recommendation. It was observed that by using fertilizer according to the recommended dose calculated on the basis of soil test values, farmers could harvest approx. 7-22% higher yield of different crops over usual farmers practice. If this system can be popularized and disseminated by effective agricultural extension, this would immensely contribute to the promotion of precision agriculture, input cost reduction and it would certainly enable us to optimize fertilizer application by the smallholder farmers in Bangladesh.

Comparison Of Three Soil Test Methods For Estimating Plant-available Silicon

2003 ◽  
Vol 34 (15-16) ◽  
pp. 2059-2071 ◽  
Author(s):  
Luciana de Lima Rodrigues ◽  
Samira H. Daroub ◽  
Ron W. Rice ◽  
George H. Snyder
Keyword(s):  
Test Methods ◽  
Soil Test

Validation of Soil‐Test‐Based Phosphorus and Potassium Fertilizer Recommendations for Flood‐Irrigated Rice

2019 ◽  
Vol 111 (5) ◽  
pp. 2523-2535 ◽  
Author(s):  
Matthew S. Fryer ◽  
Nathan A. Slaton ◽  
Trenton L. Roberts ◽  
Jarrod T. Hardke ◽  
Richard J. Norman
Keyword(s):  
Soil Test ◽  
Potassium Fertilizer ◽  
Irrigated Rice ◽  
Fertilizer Recommendations ◽  
Phosphorus And Potassium

scholarly journals Interlaboratory comparison of soil phosphorus extracted by various soil test methods

2001 ◽  
Vol 32 (15-16) ◽  
pp. 2325-2345 ◽  
Author(s):  
Peter J. A. Kleinman ◽  
A. N. Sharpley ◽  
K. Gartley ◽  
W. M. Jarrell ◽  
S. Kuo ◽  
...  
Keyword(s):  
Interlaboratory Comparison ◽  
Soil Phosphorus ◽  
Test Methods ◽  
Soil Test
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