http://dspace.icrisat.ac.in:8080 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. 2012-02-22T08:16:17Z http://hdl.handle.net/10731/3718 Title: Nitrogen mineralization in lowland rice soils: the role of organic matter quantity and quality Authors: Sahrawat, K.L. Abstract: Ammonium production in wetland soils and sediments is the key process that impacts nitrogen (N) availability, wetland productivity and environmental quality. Significant relationships between organic matter content and mineralizable N have been reported for diverse groups of wetland rice soils. However, recent research also showed that in soils under intensified wetland rice production systems, the relationships between organic matter and mineralizable N are poor or not significant. The review of recent research suggests that both organic matter quantity and quality are influenced by prolonged submergence, which in turn affects mineralization and N supply in wetland soils. While organic matter quantity increases following prolonged submergence of soil; submergence also changes the chemistry and quality of soil organic matter, which influences N mineralization. The increase in N mineralization as a result of increase in organic matter quantity is countered by the change in the chemistry and quality of organic matter. The changes in chemical composition of soil organic matter and their influence on N mineralization in submerged soils are discussed with examples from recent research. 2009-12-31T18:30:00Z http://hdl.handle.net/10731/3717 Title: Inheritance studies in castor, Ricinus communis L. Authors: Kumar, A.A. (A. Ashok Kumar); Janila, P.; Sujatha, M.; Hemalatha, V. Abstract: In castor, Ricinus communis L. inheritance of anthocyanin pigment on stem (APS), bloom, capsule spinyness and cup shape of leaves is monogenic. Capsule spinyness is a co-dominant character and bloom is controlled by multiple alleles. Inheritance of papaya leaf lacination is digenic and shows dominant epistasis. Co-segregation studies revealed absence of linkage between the characters bloom, leaf shape, and APS 2009-12-31T18:30:00Z http://hdl.handle.net/10731/3716 Title: Effect of global recession on Indian agriculture Authors: Chand, R.; Raju, S.S.; Pandey, L.M. Abstract: This paper asssesses the impact of the global economic slowdown and financial crisis on India's agricultural sector 2009-12-31T18:30:00Z http://hdl.handle.net/10731/3715 Title: Unlocking the potential of agriculture in north-eastern hill region of India Authors: Birthal, P.S. 2009-12-31T18:30:00Z