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Partial Acidulation of Rock Phosphate for Increased Productivity in Organic and Smallholder Farming

Cicek, Harun; Bhullar, Gurbir S.; Mandloi, Lokendra S.; Andres, Christian and Riar, Amritbir (2020) Partial Acidulation of Rock Phosphate for Increased Productivity in Organic and Smallholder Farming. Sustainability, 12 (2), p. 607.

[thumbnail of sustainability-12-00607-v3 (1).pdf] PDF - Published Version - English

Document available online at: https://www.mdpi.com/2071-1050/12/2/607


There is a need to investigate and identify locally available organic substrates with acidifying potential, which can be used as an additive in rock phosphate (RP)-organic material composting mixtures. This paper reviews attempts to increase P availability in the context of smallholder, low-input and organic farming, and presents a case study from Central India that used a participatory approach to address P deficiency issues in cotton-based organic systems. Study was conducted from 2010 to 2014 through 61 on-farm trials and investigated the agronomic effectiveness of buttermilk-acidulated RP compost. The application of buttermilk-acidulated RP manure resulted in higher yields of cotton in all field trials and higher yields of soybean in all but one field trials. While on majority of the farms (18 out of 28), wheat yields increased with the application of buttermilk-acidulated RP compost, a quarter of the field trials (7 out of 28) exhibited yields lower than farmers’ practices. The study showed that it was possible to develop a locally adoptable solution to an agronomic constraint using locally available resources including the indigenous knowhow. Buttermilk proved to be an effective acidulating agent that can be added to RP-amended compost.

EPrint Type:Journal paper
Keywords:Abacus, FiBL6516602
Subjects: Crop husbandry > Composting and manuring
Soil > Nutrient turnover
"Organics" in general > Countries and regions > India
Farming Systems > Farm nutrient management
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > International
Deposited By: Cicek, Harun
ID Code:37965
Deposited On:10 May 2020 01:32
Last Modified:19 Jun 2023 07:30
Document Language:English
Refereed:Peer-reviewed and accepted

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